Cognitive function assessment method, device, electronic device and storage medium

Abstract

The present application provides a cognitive function assessment method, device, electronic device and storage medium, which relate to the computer field. The cognitive function assessment method includes: obtaining a stereoscopic EEG signal set when a user performs a preset cognitive function assessment test task; based on the stereoscopic EEG signal set, obtaining a brain state assessment result corresponding to the preset cognitive function assessment test task; obtaining an initial cognitive function assessment result when the user performs a preset cognitive function assessment test task; based on the brain state assessment result and the initial cognitive function assessment result, obtaining the user's cognitive function assessment result for the preset cognitive function assessment test task. This solution adds an analysis of the degree of connectivity of the user's brain areas, so that the cognitive function assessment results are no longer based solely on the subjects' answers and behaviors. The initial cognitive function test results are calibrated by the degree of connectivity of the user's brain areas, reducing the errors caused by the subjective judgment of the examiner and improving the accuracy of the final results.

Description

Technical Field

[0001] The present application relates to the field of computers, and in particular to a cognitive function assessment method, device, electronic device and storage medium. Background Art

[0002] At present, when it is necessary to evaluate the cognitive level of a user, the Wechsler Adult Intelligence Scale (WAIS) is mostly used to evaluate the cognitive level of the user being tested. The Wechsler Intelligence Scale measurement method has a complex structure. It not only has a verbal subtest, but also an operational subtest. It can provide three IQ scores and multiple subtest scores at the same time, which can better reflect the overall picture of a person's intelligence and measure various intelligence factors.

[0003] However, the Wechsler Intelligence Scale, which is widely used at present, only evaluates the subjects from two aspects: the answers and behaviors of the subjects. In addition, the test results require the subjective judgment of the examiner, which will reduce the accuracy of the evaluation. Summary of the invention

[0004] The present application provides a cognitive function assessment method, device, electronic device and storage medium to solve the problem of low accuracy of user cognitive function assessment results obtained by the prior art.

[0005] In a first aspect, the present application provides a cognitive function assessment method, comprising: obtaining a stereoscopic EEG signal set when a user performs a preset cognitive function assessment test task, wherein the stereoscopic EEG signal set includes stereoscopic EEG signals of each of a plurality of preset brain regions; based on the stereoscopic EEG signal set, obtaining a brain state assessment result corresponding to the preset cognitive function assessment test task, the brain state assessment result characterizing the degree of connectivity between all brain regions contained in the stereoscopic EEG signal set; obtaining an initial cognitive function assessment result when the user performs the preset cognitive function assessment test task, the initial cognitive function assessment result being obtained based on the answers and behaviors made by the user when performing the assessment test task; based on the brain state assessment result and the initial cognitive function assessment result, obtaining the cognitive function assessment result of the user for the preset cognitive function assessment test task.

[0006] In an embodiment of the present application, the final cognitive function assessment result is obtained by combining the initial cognitive function assessment result and the brain state assessment result. Since the initial cognitive function assessment result is obtained based on the answers and behaviors made by the user when performing the assessment test task, and the brain state assessment result represents the degree of connectivity between all brain regions contained in the stereo EEG signal set, the cognitive function assessment result is no longer limited to the user's answers and behaviors, but also needs to be calibrated with the initial cognitive function assessment result through the connectivity of the user's brain regions, thereby reducing the error caused by the subjective judgment of the examiner and improving the accuracy of the final result.

[0007] In combination with the technical solution provided in the first aspect above, in some possible implementations, the method of obtaining a stereoscopic EEG signal set when a user performs a preset cognitive function assessment test task includes: obtaining an initial stereoscopic EEG signal set corresponding to the preset cognitive function assessment test task, the initial stereoscopic EEG signal set including multiple single EEG signals, the single EEG signal being a stereoscopic EEG signal collected by a single collection unit for collecting EEG signals of multiple preset brain regions, the preset multiple brain regions being brain regions involved in performing the preset cognitive function assessment test task; based on the initial stereoscopic EEG signal set, obtaining the brain region stereoscopic EEG signals of each of the multiple preset brain regions.

[0008] In an embodiment of the present application, stereoscopic EEG signals of each of a plurality of preset brain regions are obtained through an initial EEG signal set, so that a brain state assessment result representing the degree of connectivity between brain regions can be obtained based on the stereoscopic EEG signals of each brain region.

[0009] In combination with the technical solution provided in the first aspect above, in some possible implementations, the brain state assessment result corresponding to the preset cognitive function assessment test task is obtained based on the stereoscopic EEG signal set, including: selecting stereoscopic EEG signals of any two brain regions from the stereoscopic EEG signal set to obtain a connectivity coefficient characterizing the degree of connectivity between the two brain regions; and obtaining a brain state assessment result characterizing the degree of connectivity between all brain regions contained in the stereoscopic EEG signal set based on all connectivity coefficients corresponding to the preset cognitive function assessment test task.

[0010] In the embodiment of the present application, since all connectivity coefficients corresponding to the preset cognitive function assessment test task can comprehensively and fully reflect the connectivity relationship between all brain regions corresponding to the preset cognitive function assessment test task, the brain state assessment result obtained based on all connectivity coefficients corresponding to the preset cognitive function assessment test task can accurately reflect the connectivity degree between all brain regions contained in the stereo EEG signal set.

[0011] In combination with the technical solution provided in the first aspect above, in some possible implementations, the step of selecting stereo EEG signals of two brain regions from the stereo EEG signal set to obtain a connectivity coefficient characterizing the degree of connectivity between the two brain regions includes: selecting stereo EEG signals of two brain regions from the stereo EEG signal set; and calculating the connectivity coefficient of the two brain regions based on a preset formula and the stereo EEG signals of the two brain regions, wherein the preset formula is: Wherein, N is the number of sampling points, θ1(n) is the phase of the stereo EEG signal of one brain region at the nth sampling point, θ2(n) is the phase of the stereo EEG signal of another brain region at the nth sampling point, i is the imaginary unit, and PLV is the connectivity coefficient.

[0012] In an embodiment of the present application, when obtaining the connectivity coefficient characterizing the degree of connectivity between two brain regions, every sampling point in the stereoscopic EEG signals corresponding to the two brain regions is fully taken into consideration, so that the obtained connectivity coefficient can comprehensively and accurately reflect the degree of connectivity between the two brain regions.

[0013] In combination with the technical solution provided in the first aspect above, in some possible implementations, the cognitive function assessment result of the user for the preset cognitive function assessment test task is obtained based on the brain state assessment result and the initial cognitive function assessment result, including: using the Kalman filtering method to fuse the brain state assessment result and the initial cognitive function assessment result to obtain the cognitive function assessment result of the user for the preset cognitive function assessment test task.

[0014] In an embodiment of the present application, the Kalman filtering method is used to fuse the brain state assessment results and the initial cognitive function assessment results. Since the Kalman filtering method performs closed-loop management of errors when fusing the brain state assessment results and the initial cognitive function assessment results, the errors can be limited to a certain range, thereby improving the accuracy of the obtained cognitive function assessment results.

[0015] In combination with the technical solution provided in the first aspect above, in some possible implementations, after obtaining the cognitive function assessment result of the user for the preset cognitive function assessment test task, the method further includes: based on the cognitive function assessment result of the user for each preset cognitive function assessment test task, obtaining an overall cognitive function assessment result characterizing the overall cognitive function of the user.

[0016] In the embodiment of the present application, since the overall cognitive function assessment result takes into account the cognitive function assessment result of each preset cognitive function assessment test task, the overall cognitive function assessment result can accurately represent the user's overall cognitive function.

[0017] In combination with the technical solution provided in the first aspect above, in some possible implementations, the preset cognitive function assessment test tasks include at least one of motor association, other-induced listener emotions, natural-induced listener emotions, common sense rationality, emotion induction, passive attention, habituation ability, visual working memory, visual-spatial memory, attention perception, feature perception, imagery ability, semantic perception, digital working memory and language production.

[0018] In the embodiment of the present application, through various preset cognitive function assessment test tasks, the user's cognitive function can be comprehensively assessed, thereby improving the applicability of the present solution.

[0019] In a second aspect, the present application provides a cognitive function assessment device, including an acquisition module and a processing module. The acquisition module is used to acquire a stereoscopic EEG signal set when a user performs a preset cognitive function assessment test task, wherein the stereoscopic EEG signal set includes stereoscopic EEG signals of each of a plurality of preset brain regions; the processing module is used to obtain a brain state assessment result corresponding to the preset cognitive function assessment test task based on the stereoscopic EEG signal set, wherein the brain state assessment result characterizes the degree of connectivity between all brain regions contained in the stereoscopic EEG signal set; the acquisition module is also used to acquire an initial cognitive function assessment result when the user performs the preset cognitive function assessment test task, wherein the initial cognitive function assessment result is obtained based on the answers and behaviors made by the user when performing the assessment test task; the processing module is also used to obtain the cognitive function assessment result of the user for the preset cognitive function assessment test task based on the brain state assessment result and the initial cognitive function assessment result.

[0020] In a third aspect, an embodiment of the present application further provides an electronic device, comprising: a memory and a processor, wherein the memory and the processor are connected; the memory is used to store programs; and the processor is used to call the programs stored in the memory to execute a method provided in the above-mentioned first aspect embodiment and / or any possible implementation method in combination with the above-mentioned first aspect embodiment.

[0021] In a fourth aspect, an embodiment of the present application further provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a computer, the method provided in the embodiment of the first aspect above and / or in any possible implementation manner in combination with the embodiment of the first aspect above is executed. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 A schematic diagram of a process flow of a cognitive function assessment method shown in an embodiment of the present application;

[0024] Figure 2 A schematic diagram of an electroencephalogram signal shown in an embodiment of the present application;

[0025] Figure 3 This is a structural block diagram of a cognitive function assessment device shown in an embodiment of the present application;

[0026] Figure 4 A structural block diagram of an electronic device shown in an embodiment of the present application. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0028] It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it is not necessary to further define and explain it in the subsequent drawings. At the same time, in the description of this application, relational terms such as "first", "second", etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the term "include", "comprise" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also includes other elements that are not clearly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of more restrictions, the elements limited by the sentence "including one..." do not exclude the existence of other identical elements in the process, method, article or equipment including the elements.

[0029] Furthermore, the term "and / or" in this application is merely a term used to describe the association relationship between associated objects, indicating that three relationships may exist. For example, A and / or B may represent three situations: A exists alone, A and B exist at the same time, and B exists alone.

[0030] The technical solution of the present application will be described in detail below with reference to the accompanying drawings.

[0031] In order to solve the problem of low accuracy of the user's cognitive function assessment results obtained by the prior art, the present application provides a cognitive function assessment method, device, electronic device and storage medium.

[0032] See also Figure 1 , Figure 1 A flowchart of a cognitive function assessment method provided in an embodiment of the present application is shown below. Figure 1 Describe the steps it involves.

[0033] S100: Acquire a stereoscopic electroencephalogram signal set when the user performs a preset cognitive function assessment test task.

[0034] The stereo EEG signal set includes stereo EEG signals of respective preset multiple brain regions.

[0035] For example, the preset multiple brain regions may include at least two brain regions of the occipital lobe, anterior insula, anterior cingulate gyrus, prefrontal lobe, striatum, orbitofrontal lobe, amygdala, temporal lobe, Nie joint, anterior cingulate gyrus, frontal lobe, intraparietal sulcus, precentral sulcus, frontal eye movement area, cingulate gyrus, precuneus, parietal lobule, temporo-occipital junction, visual cortex, occipital visual area, cerebellum, motor cortex, inferior frontal gyrus, middle temporal gyrus, thalamus, fusiform gyrus, lingual gyrus, precentral gyrus, inferior frontal gyrus, parietal lobe, etc. The various brain regions in the above examples can be randomly combined as needed to obtain multiple brain regions, which are not listed one by one here.

[0036] Optionally, the preset cognitive function assessment test tasks may include at least one of motor association, other-induced listener emotions, natural-induced listener emotions, common sense rationality, emotion induction, passive attention, habituation ability, visual working memory, visual spatial memory, attention perception, feature perception, imagery ability, semantic perception, digital working memory and language production.

[0037] It is understandable that different preset cognitive function assessment test tasks correspond to different brain regions. For example, the brain regions involved in motor association include the occipital lobe and frontal lobe, and the brain regions involved in others inducing listeners' emotions include the temporal lobe, prefrontal lobe, amygdala, and nepal joint. Please refer to Table 1 for details:

[0038] Table 1

[0039]

[0040]

[0041] The task names in Table 1 are the names of the tasks corresponding to each test type. For example, when the test type is motion association, the name of the corresponding test task can be Biological Motion. It is understandable that the task names in Table 1 can be set flexibly, and it is only necessary to ensure that the names of the test tasks of each test type are unique. Therefore, the task names in Table 1 cannot be understood as limitations on this application.

[0042] As shown in Table 1, different preset cognitive function assessment test tasks have different test forms. For example, when users perform the preset cognitive function assessment test task of motion association, they need to be tested visually. For example, a video of a little man walking composed of dots is played for the user, and the user is required to judge the walking direction, or a pair of rotated pictures at different angles (two pictures are a pair of rotated pictures), and the subject is required to judge whether the two pictures can be overlapped by simple rotation; when users perform the preset cognitive function assessment test task of others inducing listeners' emotions, they need to be tested auditorily. For example, audio of different scenes is played for the user, and the user is required to judge the audio of the scene content of the audio. The above examples are only for ease of understanding. The test forms of different preset cognitive function assessment test tasks can be set according to actual needs, and their specific test forms are not limited here.

[0043] When the test is visual, the user needs to look at the screen and watch the corresponding pictures or videos. When the test is auditory, the user needs to wear Bluetooth headphones to complete the test. When the test is a two-choice decision, the user needs to answer according to the prompts on the keyboard or screen, or the main tester (tester) can do it on behalf of the user.

[0044] The stereo EEG signal set when the user performs a preset cognitive function assessment test task can be pre-acquired and stored in a database, and can be directly called when needed; or it can be acquired in real time when needed.

[0045] In one implementation, the specific process of obtaining a stereoscopic EEG signal set when a user performs a preset cognitive function assessment test task includes: first obtaining an initial stereoscopic EEG signal set corresponding to the preset cognitive function assessment test task; and then obtaining stereoscopic EEG signals of each of multiple preset brain regions based on the initial stereoscopic EEG signal set.

[0046] The initial stereo EEG signal set includes multiple single EEG signals, where the single EEG signal is a stereo EEG signal collected by a single collection unit for collecting EEG signals of multiple preset brain regions, and the preset multiple brain regions are brain regions involved in performing preset cognitive function assessment test tasks. The brain regions involved in performing preset cognitive function assessment test tasks can be found in Table 1, which will not be repeated here.

[0047] Optionally, the initial stereo EEG signal set can be pre-acquired and stored in a database, and can be directly called when needed. Alternatively, it can be acquired in real time when needed. The specific process of collecting the initial stereo EEG signal using the stereo EEG signal acquisition system is well known to those skilled in the art, and will not be repeated here for the sake of brief description.

[0048] When the user performs a preset cognitive function assessment test task, if the user needs to perform multiple different preset cognitive function assessment test tasks in succession, the collected stereo EEG signals can be marked at the beginning of each preset cognitive function assessment test task to facilitate subsequent distinction of the stereo EEG signals corresponding to different preset cognitive function assessment test tasks.

[0049] For example, a marker signal may be sent to the corresponding Trigger channel through the parallel port of the stereo EEG device to mark the stereo EEG signals of different time periods, so as to distinguish the stereo EEG signals corresponding to different preset cognitive function assessment test tasks. The marker signal may be a peak value that is much larger than the fluctuation range of the stereo EEG signal. Figure 2 As shown, Figure 2 The horizontal axis is time t, and the vertical axis is voltage magnitude (in mV). Figure 2 The highest thin peak corresponding to time point a on the left is the marking signal for the start of the preset cognitive function assessment test task.

[0050] Optionally, each response made by the user in performing a preset cognitive function assessment test task can also be marked. Figure 2 As shown, Figure 2 Each thin peak on the right represents a response from the user, and thin peaks of different heights represent different responses.

[0051] At the same time, when collecting the user's stereo EEG signal, the user's response, such as answer, judgment, etc., can also be recorded synchronously, so as to obtain the initial cognitive function evaluation results later. The specific method and principle of obtaining the initial cognitive function evaluation results will be described in detail in the subsequent content, and the specific acquisition method will not be introduced here.

[0052] S200: Based on the stereoscopic EEG signal set, obtaining a brain state assessment result corresponding to the preset cognitive function assessment test task.

[0053] The brain state assessment results characterize the degree of connectivity between all brain regions included in the stereo EEG signal set.

[0054] In one implementation mode, the specific process of S200, that is, the specific process of obtaining the brain state assessment result corresponding to the preset cognitive function assessment test task based on the stereoscopic EEG signal set can be: first, select stereoscopic EEG signals of any two brain regions from the stereoscopic EEG signal set to obtain the connectivity coefficient characterizing the degree of connectivity between the two brain regions; then, based on all connectivity coefficients corresponding to the preset cognitive function assessment test task, obtain the brain state assessment result characterizing the degree of connectivity between all brain regions contained in the stereoscopic EEG signal set.

[0055] For ease of understanding, take the preset cognitive function assessment test task of inducing listener emotions by others as an example. Since the brain areas corresponding to the listener's emotions induced by others include the temporal lobe, prefrontal lobe, amygdala, and Nie joint, the stereo EEG signal set includes stereo EEG signals of the brain areas corresponding to the temporal lobe, prefrontal lobe, amygdala, and Nie joint. Based on the stereo EEG signal set, the connectivity coefficients of any two brain areas in the stereo EEG signal set are obtained, that is, the connectivity coefficients of the six brain area combinations of temporal lobe-prefrontal lobe, temporal lobe-amygdala, temporal lobe-Nie joint, prefrontal lobe-amygdala, prefrontal lobe-Nie joint, and amygdala-Nie joint. Then, based on the six connectivity coefficients, the brain state assessment results are obtained.

[0056] Optionally, based on all connectivity coefficients corresponding to the preset cognitive function assessment test task, a brain state assessment result characterizing the degree of connectivity between all brain regions contained in the stereo EEG signal set is obtained, and the average value of all connectivity coefficients can be used as the brain state assessment result; or, weight values ​​can be preset for different connectivity coefficients, and the weighted average value of all connectivity coefficients can be used as the brain state assessment result; or, the sum of all connectivity coefficients can be used as the brain state assessment result. Among them, the weight values ​​corresponding to different connectivity coefficients can be set according to actual needs, and there is no limitation here.

[0057] Optionally, the specific process of selecting the stereo EEG signals of any two brain regions from the stereo EEG signal set to obtain the connectivity coefficient characterizing the degree of connectivity between the two brain regions may be: first, select the stereo EEG signals of any two brain regions from the stereo EEG signal set; and then calculate the connectivity coefficient of the two brain regions based on a preset formula and the stereo EEG signals of the two brain regions.

[0058] The preset formula can be N is the number of sampling points, θ1(n) is the phase of the stereo EEG signal of one brain region at the nth sampling point, θ2(n) is the phase of the stereo EEG signal of the other brain region at the nth sampling point, i is the imaginary unit, and PLV is the connectivity coefficient. The larger the connectivity coefficient, the higher the degree of connectivity between the two brain regions.

[0059] S300: Obtaining an initial cognitive function assessment result when the user performs the preset cognitive function assessment test task.

[0060] The initial cognitive function assessment results are obtained based on the responses and behaviors made by the user when performing the assessment test tasks.

[0061] Among them, the Wechsler Intelligence Scale measurement method can be used to evaluate the answers and behaviors made by the user when performing the evaluation test task to obtain the initial cognitive function evaluation result. Alternatively, other methods can be used for evaluation, as long as the initial cognitive function evaluation result can be obtained based on the answers and behaviors made by the user when performing the evaluation test task, and the specific evaluation method is not limited here.

[0062] S400: Based on the brain state assessment result and the initial cognitive function assessment result, obtain the user's cognitive function assessment result for a preset cognitive function assessment test task.

[0063] Optionally, after obtaining the brain state assessment result and the initial cognitive function assessment result, the sum of the brain state assessment result and the initial cognitive function assessment result may be used as the cognitive function assessment result of the preset cognitive function assessment test task.

[0064] Alternatively, the average of the brain state assessment result and the initial cognitive function assessment result is used as the cognitive function assessment result of the preset cognitive function assessment test task.

[0065] Alternatively, the weight values ​​corresponding to the brain state assessment result and the initial cognitive function assessment result are preset, and the weighted average of the brain state assessment result and the initial cognitive function assessment result is used as the cognitive function assessment result of the preset cognitive function assessment test task. Among them, the weight values ​​corresponding to the brain state assessment result and the initial cognitive function assessment result can be set according to actual needs, and there is no limitation here.

[0066] Alternatively, the brain state assessment result and the initial cognitive function assessment result are fused using the Kalman filter method to obtain the user's cognitive function assessment result for the preset cognitive function assessment test task. The specific process and principle of fusing the two data using the Kalman filter method are well known to those skilled in the art, and will not be repeated here for the sake of brief description.

[0067] It is understandable that the brain state assessment result and the initial cognitive function assessment result are obtained in different ways, and therefore, the score intervals of the brain state assessment result and the initial cognitive function assessment result may be different. At this time, the brain state assessment result and the initial cognitive function assessment result can be standardized so that the score intervals of the standardized brain state assessment result and the initial cognitive function assessment result are the same, and then based on the standardized brain state assessment result and the initial cognitive function assessment result, the user's cognitive function assessment result for the preset cognitive function assessment test task is obtained.

[0068] For example, A represents the brain state assessment result, and B represents the initial cognitive function assessment result. The score interval of the brain state assessment result is [0,10], and the score interval of the initial cognitive function assessment result is [0,5]. Then the brain state assessment result can be divided by 10, and the initial cognitive function assessment result can be divided by 5. That is, the standardized brain state assessment result is A / 10, and the standardized initial cognitive function assessment result is B / 5. Then, the cognitive function assessment result is obtained based on A / 10 and B / 5.

[0069] It can be understood that the above examples are only for ease of understanding. The score ranges of the brain state assessment results and the initial cognitive function assessment results can be set according to actual needs, and the specific method of standardization can also be set according to actual needs. There is no restriction on the specific score ranges and standardization methods here.

[0070] In one embodiment, after S400, that is, after obtaining the user's cognitive function assessment results for the preset cognitive function assessment test task, the cognitive function assessment method also includes: based on the user's cognitive function assessment results for each preset cognitive function assessment test task, obtaining an overall cognitive function assessment result that characterizes the user's overall cognitive function.

[0071] Among them, each cognitive function assessment result may be added together to obtain a total cognitive function assessment result.

[0072] For example, the user performed three types of preset cognitive function assessment test tasks: motion association, listener-induced emotions by others, and listener-induced emotions by nature, which means there are three cognitive function assessment results. If the cognitive function assessment result corresponding to motion association is X1, the cognitive function assessment result corresponding to listener-induced emotions by others is X2, and the cognitive function assessment result corresponding to listener-induced emotions by nature is X3, then the total cognitive function assessment result is X1+X2+X3.

[0073] Alternatively, the average of all cognitive function assessment results may be used as the total cognitive function assessment result.

[0074] For example, the user performed three types of preset cognitive function assessment test tasks: motion association, listener-induced emotions by others, and listener-induced emotions by nature, which means there are three cognitive function assessment results. If the cognitive function assessment result corresponding to motion association is X1, the cognitive function assessment result corresponding to listener-induced emotions by others is X2, and the cognitive function assessment result corresponding to listener-induced emotions by nature is X3. Then the total cognitive function assessment result is (X1+X2+X3)÷3.

[0075] Alternatively, a weight value is preset for each cognitive function assessment result, and then the weighted average of all cognitive function assessment results is taken as the total cognitive function assessment result. The weight value of each cognitive function assessment result can be set according to actual needs and is not limited here.

[0076] For example, the user performed three types of preset cognitive function assessment test tasks: motion association, listener-induced emotions by others, and listener-induced emotions by nature, which means there are three cognitive function assessment results. If the cognitive function assessment result corresponding to motion association is X1, the weight value is k1; the cognitive function assessment result corresponding to listener-induced emotions by others is X2, the weight value is k2; the cognitive function assessment result corresponding to listener-induced emotions by nature is X3, the weight value is k3. Then the total cognitive function assessment result is (k1X1+k2X2+k3X3)÷3.

[0077] See also Figure 3 , Figure 3 The structure block diagram of a cognitive function assessment device provided in an embodiment of the present application is as follows: The cognitive function assessment device 100 includes an acquisition module 110 and a processing module 120 .

[0078] The acquisition module 110 is used to acquire a stereoscopic EEG signal set when the user performs a preset cognitive function assessment test task, wherein the stereoscopic EEG signal set includes stereoscopic EEG signals of respective brain regions of a plurality of preset brain regions.

[0079] The processing module 120 is used to obtain a brain state assessment result corresponding to the preset cognitive function assessment test task based on the stereoscopic EEG signal set, and the brain state assessment result represents the degree of connectivity between all brain regions contained in the stereoscopic EEG signal set.

[0080] The acquisition module 110 is also used to obtain the initial cognitive function assessment result when the user performs the preset cognitive function assessment test task, and the initial cognitive function assessment result is obtained based on the answers and behaviors made by the user when performing the assessment test task.

[0081] The processing module 120 is further used to obtain the cognitive function assessment result of the user for the preset cognitive function assessment test task based on the brain state assessment result and the initial cognitive function assessment result.

[0082] The acquisition module 110 is specifically used to acquire an initial stereo EEG signal set corresponding to the preset cognitive function assessment test task, wherein the initial stereo EEG signal set includes multiple single EEG signals, and the single EEG signal is a stereo EEG signal collected by a single collection unit for collecting EEG signals of multiple preset brain regions, and the multiple preset brain regions are brain regions involved in performing the preset cognitive function assessment test task; based on the initial stereo EEG signal set, the brain region stereo EEG signals of each of the multiple preset brain regions are obtained.

[0083] The processing module 120 is specifically used to select stereoscopic EEG signals of any two brain regions from the stereoscopic EEG signal set to obtain a connectivity coefficient characterizing the degree of connectivity between the two brain regions; and based on all connectivity coefficients corresponding to the preset cognitive function assessment test task, obtain a brain state assessment result characterizing the degree of connectivity between all brain regions contained in the stereoscopic EEG signal set.

[0084] The processing module 120 is specifically used to select two brain regions' stereo EEG signals from the stereo EEG signal set; and calculate the connectivity coefficients of the two brain regions based on a preset formula and the brain region stereo EEG signals of the two brain regions, wherein the preset formula is: Wherein, N is the number of sampling points, θ1(n) is the phase of the stereo EEG signal of one brain region at the nth sampling point, θ2(n) is the phase of the stereo EEG signal of another brain region at the nth sampling point, i is the imaginary unit, and PLV is the connectivity coefficient.

[0085] The processing module 120 is specifically used to fuse the brain state assessment result and the initial cognitive function assessment result by using the Kalman filtering method to obtain the cognitive function assessment result of the user for the preset cognitive function assessment test task.

[0086] The processing module 120 is further configured to obtain a total cognitive function assessment result representing the overall cognitive function of the user based on the cognitive function assessment result of the user for each preset cognitive function assessment test task.

[0087] In one embodiment, the preset cognitive function assessment test tasks include at least one of motor association, other-induced listener emotions, natural-induced listener emotions, common sense rationality, emotion induction, passive attention, habituation ability, visual working memory, visual spatial memory, attention perception, feature perception, imagery ability, semantic perception, digital working memory and language production.

[0088] The cognitive function assessment device 100 provided in the embodiment of the present application has the same implementation principle and technical effects as those of the aforementioned cognitive function assessment method embodiment. For the sake of brief description, for matters not mentioned in the device embodiment, reference may be made to the corresponding contents in the aforementioned cognitive function assessment method embodiment.

[0089] See also Figure 4 , which is an electronic device 200 provided in an embodiment of the present application. The electronic device 200 includes: a transceiver 210, a memory 220, a communication bus 230, and a processor 240.

[0090] The transceiver 210, the memory 220, and the processor 240 are electrically connected to each other directly or indirectly to achieve data transmission or interaction. For example, these components can be electrically connected to each other via one or more communication buses 230 or signal lines. The transceiver 210 is used to send and receive data. The memory 220 is used to store computer programs, such as storing Figure 3 The software function module shown in the figure is the cognitive function evaluation device 100. The cognitive function evaluation device 100 includes at least one software function module that can be stored in the memory 220 in the form of software or firmware or fixed in the operating system (OS) of the electronic device 200.

[0091] The processor 240 is used to execute the executable modules stored in the memory 220, such as the software function modules or computer programs included in the cognitive function evaluation device 100. At this time, the processor 240 is used to obtain a stereo EEG signal set when the user performs a preset cognitive function evaluation test task, wherein the stereo EEG signal set includes stereo EEG signals of each of the preset multiple brain regions; based on the stereo EEG signal set, obtain the brain state evaluation result corresponding to the preset cognitive function evaluation test task, and the brain state evaluation result represents the degree of connectivity between all brain regions included in the stereo EEG signal set; obtain the initial cognitive function evaluation result when the user performs the preset cognitive function evaluation test task, and the initial cognitive function evaluation result is obtained based on the answers and behaviors made by the user when performing the evaluation test task; based on the brain state evaluation result and the initial cognitive function evaluation result, obtain the cognitive function evaluation result of the user for the preset cognitive function evaluation test task.

[0092] Among them, the memory 220 can be, but is not limited to, random access memory (Random Access Memory, RAM), read only memory (Read Only Memory, ROM), programmable read-only memory (Programmable Read-Only Memory, PROM), erasable programmable read-only memory (Erasable Programmable Read-Only Memory, EPROM), electrically erasable read-only memory (Electric Erasable Programmable Read-Only Memory, EEPROM), etc.

[0093] The processor 240 may be an integrated circuit chip with signal processing capabilities. The above-mentioned processor may be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it may also be a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The various methods, steps and logic block diagrams disclosed in the embodiments of the present application may be implemented or executed. The general-purpose processor may be a microprocessor or the processor 240 may also be any conventional processor, etc.

[0094] The electronic device 200 mentioned above includes but is not limited to a personal computer, a server, etc.

[0095] The embodiment of the present application also provides a non-volatile computer-readable storage medium (hereinafter referred to as storage medium), on which a computer program is stored, and when the computer program is run by a computer such as the above-mentioned electronic device 200, the cognitive function assessment method shown above is executed. The computer-readable storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, and other media that can store program codes.

[0096] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for evaluating cognitive function, characterized in that: include: Acquire a stereoscopic EEG signal set when the user performs a preset cognitive function assessment test task, wherein the stereoscopic EEG signal set includes stereoscopic EEG signals of respective brain regions of a plurality of preset brain regions; Based on the stereo EEG signal set, obtaining a brain state assessment result corresponding to the preset cognitive function assessment test task, wherein the brain state assessment result represents the degree of connectivity between all brain regions included in the stereo EEG signal set; Obtaining an initial cognitive function assessment result when the user performs the preset cognitive function assessment test task, wherein the initial cognitive function assessment result is obtained based on the answers and behaviors made by the user when performing the assessment test task; The brain state assessment result and the initial cognitive function assessment result are fused using a Kalman filter method to obtain a cognitive function assessment result of the user for the preset cognitive function assessment test task; The step of obtaining a brain state assessment result corresponding to the preset cognitive function assessment test task based on the stereo electroencephalogram signal set includes: Selecting two brain region stereo EEG signals of the brain region from the stereo EEG signal set; Based on a preset formula and the stereo EEG signals of the two brain regions, the connectivity coefficients of the two brain regions are calculated. The preset formula is: , where N is the number of sampling points, θ1(n) is the phase of the stereo EEG signal of one brain region at the nth sampling point, θ2(n) is the phase of the stereo EEG signal of another brain region at the nth sampling point, i is the imaginary unit, and PLV is the connectivity coefficient; Based on all connectivity coefficients corresponding to the preset cognitive function assessment test task, a brain state assessment result characterizing the degree of connectivity between all brain regions included in the stereo EEG signal set is obtained.

2. The method according to claim 1, characterized in that: The step of obtaining a stereoscopic EEG signal set when the user performs a preset cognitive function assessment test task includes: Acquire an initial stereo EEG signal set corresponding to the preset cognitive function assessment test task, wherein the initial stereo EEG signal set includes a plurality of single EEG signals, wherein the single EEG signal is a stereo EEG signal collected by a single collection unit for collecting EEG signals of a plurality of preset brain regions, wherein the plurality of preset brain regions are brain regions involved in performing the preset cognitive function assessment test task; Based on the initial stereo electroencephalogram signal set, stereo electroencephalogram signals of each of the preset multiple brain regions are obtained.

3. The method according to claim 1, characterized in that: After obtaining the cognitive function assessment result of the user for the preset cognitive function assessment test task, the method further includes: Based on the cognitive function assessment result of the user for each preset cognitive function assessment test task, an overall cognitive function assessment result representing the overall cognitive function of the user is obtained.

4. The method according to claim 1, characterized in that The preset cognitive function assessment test tasks include at least one of motor association, other-induced listener emotions, natural-induced listener emotions, common sense rationality, emotion induction, passive attention, habituation ability, visual working memory, visual spatial memory, attention perception, feature perception, imagery ability, semantic perception, digital working memory and language production.

5. A cognitive function assessment device, characterized in that: include: An acquisition module, used to acquire a stereoscopic EEG signal set when a user performs a preset cognitive function assessment test task, wherein the stereoscopic EEG signal set includes stereoscopic EEG signals of respective brain regions of a plurality of preset brain regions; A processing module, configured to obtain a brain state assessment result corresponding to the preset cognitive function assessment test task based on the stereoscopic EEG signal set, wherein the brain state assessment result represents the degree of connectivity between all brain regions included in the stereoscopic EEG signal set; The acquisition module is further used to acquire an initial cognitive function evaluation result when the user performs the preset cognitive function evaluation test task, wherein the initial cognitive function evaluation result is obtained based on the answers and behaviors made by the user when performing the evaluation test task; The processing module is further used to fuse the brain state assessment result and the initial cognitive function assessment result using a Kalman filter method to obtain the user's cognitive function assessment result for the preset cognitive function assessment test task; The processing module is specifically used to select two brain regions' stereo EEG signals from the stereo EEG signal set; and calculate the connectivity coefficients of the two brain regions based on a preset formula and the brain region stereo EEG signals of the two brain regions, wherein the preset formula is: , where N is the number of sampling points, θ1(n) is the phase of the stereo EEG signal of one of the brain regions at the nth sampling point, θ2(n) is the phase of the stereo EEG signal of another brain region at the nth sampling point, i is an imaginary unit, and PLV is the connectivity coefficient; based on all the connectivity coefficients corresponding to the preset cognitive function assessment test task, a brain state assessment result characterizing the degree of connectivity between all brain regions contained in the stereo EEG signal set is obtained.

6. An electronic device, characterized in that: include: A memory and a processor, wherein the memory and the processor are connected; The memory is used to store programs; The processor is used to call the program stored in the memory to execute the method according to any one of claims 1 to 4.

7. A computer-readable storage medium, characterized in that: A computer program is stored thereon, and when the computer program is executed by a computer, the method according to any one of claims 1 to 4 is executed.

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