Group brain regulation and control method and device based on multi-modal sensory stimulation

Abstract

The invention discloses a group brain regulation and control method and device based on multi-modal sensory stimulation. The method comprises the following steps: acquiring intercerebral synchronization baseline levels of a plurality of users; implementing in-phase auditory, tactile, or visual stimuli at a specific frequency to the user to manipulate synchronized neural activity at a specific brain region of the user; obtaining an inter-brain synchronization result of the user again; and according to the inter-brain synchronization result of the user before and after the implementation of the multi-modal sensory stimulation, a visual report reflecting the inter-brain synchronization improvement condition before and after the group brain regulation is provided for the user. According to the method, the synchronism of brain activities is manipulated by implementing in-phase sensory stimulation with specific frequency to the user, the problems of high cost, complex operation, low user acceptability, limited popularization and application and the like of the existing group brain regulation and control technology based on electrical stimulation are solved, and a practical means is provided for promoting interpersonal interaction.

Description

Technical Field

[0001] The present invention belongs to the technical field of group brain regulation, and in particular, relates to a group brain regulation method and device based on multimodal sensory stimulation. Background Art

[0002] Social interaction is one of the basic activities of human society. The process of human interaction involves complex social cognition and brain neural activity. In recent years, some researchers have used "hyperscanning" technology, that is, measuring the brains of two (or more) individuals at the same time to explore the neural mechanisms behind interpersonal interaction. Many studies have found that "inter-brain synchronization" (i.e., synchronization of brain signals between people, inter-brain synchrony) will occur during the interaction between two or more individuals (such as cooperative learning), and that inter-brain synchrony is positively correlated with the effect of interpersonal interaction (i.e., the stronger the inter-brain synchrony, the better the interaction effect). These studies have deepened our understanding of interpersonal interaction from the perspective of inter-brain synchrony.

[0003] However, most studies have only revealed the correlation between brain-to-brain synchronization and interpersonal interaction, but have not further clarified a key issue, namely, whether brain-to-brain synchronization is a neural mechanism that promotes interpersonal interaction or an incidental neurophysiological phenomenon (epiphenomenon) during the interaction process? In response to this issue, some researchers have recently conducted in-depth research and made initial progress. The researchers used transcranial alternating current stimulation (tACS) technology to simultaneously stimulate the brain activity of two interactors (i.e., multi-brain stimulation) to manipulate brain-to-brain synchronization and found that exogenous manipulation of brain-to-brain synchronization can promote interpersonal interaction. These research evidences show that brain-to-brain synchronization plays a significant role in promoting interpersonal interaction. However, there are many shortcomings in the group brain regulation technology based on electrical stimulation, such as high cost, cumbersome operation, and low user acceptance, which also limit the promotion and application of this technology. Summary of the invention

[0004] In order to solve the problems existing in the background technology and overcome the limitations of group brain control technology based on electrical stimulation in terms of cost, operability, user acceptance, and promotability, the purpose of the present invention is to provide a group brain control method and device based on multimodal sensory stimulation.

[0005] The technical solution adopted by the method of the present invention is:

[0006] 1. A method for group brain regulation based on multimodal sensory stimulation, comprising the following steps:

[0007] Step S1, firstly, multiple users are equipped with functional near-infrared spectroscopy equipment on their heads to collect brain activity signals of the users and obtain the baseline level of inter-brain synchrony of the users;

[0008] Step S2, applying multimodal sensory stimulation to all users, and then obtaining the brain synchronization results of the users after applying the multimodal sensory stimulation;

[0009] Step S3: Based on the inter-brain synchronization results of the user before and after the multimodal sensory stimulation is applied, a visualization report is provided to the user reflecting the improvement of the inter-brain synchronization before and after the group brain regulation.

[0010] The near-infrared brain function imaging device in step S1 is used to collect brain activity signals of multiple users based on the superscanning technology, and then obtain the brain synchronization results between the users according to the brain activity signals of the users. The method for obtaining the brain synchronization results is as follows:

[0011] Firstly, the wavelet-transform coherence analysis method is used to obtain the coherence between the brain activity signals of the two users. Then, the coherence between the two brain activity signals is used as the result of inter-brain synchronization between the two users.

[0012] The inter-brain synchronization result between users is realized through a signal processing module, the input of the signal processing module is the user's brain activity signal, and the output is the inter-brain synchronization result between the two users.

[0013] In step S1, the baseline level of the user's brain synchronization is specifically the user's brain synchronization result before the multimodal sensory stimulation is applied.

[0014] The step S2 is specifically as follows: first, multimodal sensory stimulation is applied to all users, and after the multimodal sensory stimulation is completed, the brain activity signals of the users are collected using near-infrared brain functional imaging equipment, and then the brain synchronization results between the users after group brain regulation are obtained based on the brain activity signals of each user.

[0015] The multimodal sensory stimulation in step S2 includes one or more of rhythmic auditory stimulation, rhythmic tactile stimulation and rhythmic visual stimulation.

[0016] Applying multimodal sensory stimulation to all users in step S2 specifically includes: applying multimodal sensory stimulation with the same frequency, such as 6 Hz, and the same phase in phase to all users.

[0017] 2. A multi-modal sensory stimulation group brain control device for implementing the above method:

[0018] Including near-infrared brain function imaging equipment for obtaining the user's brain activity signals;

[0019] including a signal processing module for obtaining inter-brain synchronization results between users based on brain activity signals of the users;

[0020] A multimodal sensory stimulation device is included, which is used to apply multimodal sensory stimulation to all users, wherein the multimodal sensory stimulation includes one or more of auditory stimulation, tactile stimulation and visual stimulation.

[0021] It includes a visualization output module for outputting a visualization report on the improvement of the brain synchronization of the user group before and after brain regulation according to the brain synchronization results of the users before and after the application of multimodal sensory stimulation.

[0022] The multimodal sensory stimulation device comprises headphones, a vibrator and a computer display screen. The headphones are used to apply synchronous auditory stimulation to multiple users, the vibrator is used to apply synchronous tactile stimulation to multiple users, and the computer display screen is used to apply synchronous visual stimulation to multiple users.

[0023] In-phase auditory, tactile or visual stimulation of specific frequencies is used to manipulate the synchronized neural activity of specific brain areas (such as auditory, motor and visual cortices) of the user

[0024] The implementation steps of the present invention include obtaining the baseline level of brain synchronization of multiple users; implementing in-phase auditory, tactile or visual stimulation of a specific frequency to the users to manipulate the synchronous neural activity of specific brain areas (such as auditory, motor and visual cortex) of the users; obtaining the results of brain synchronization of the users again; and providing users with a visual report reflecting the improvement of brain synchronization before and after group brain regulation based on the results of brain synchronization of the users before and after the implementation of multimodal sensory stimulation. The present invention manipulates the brain synchronization of users by implementing in-phase sensory stimulation of a specific frequency to the users, providing a group brain regulation method and device with low cost, simple operation, high user acceptance and strong scalability.

[0025] The principle of the present invention is based on the phenomenon of neural entrainment. Brain science research reveals that external rhythmic stimulation (including rhythmic sound, image and other sensory stimulation) can unidirectionally drive the neural oscillation activity of the corresponding brain area of ​​the brain, so that the neural oscillation of the brain and the external rhythmic stimulation produce phase lock, and realize the synchronization of brain neural oscillation and external rhythmic stimulation. Specifically, when the rhythmic stimulation is applied to a human individual, the neuron clusters in the corresponding brain area of ​​the individual brain change from the baseline state (i.e., irregular discharge activity) to a regularized activity state, and its activity frequency tends to be synchronized with the external rhythmic stimulation, and its activity phase is also gradually coupled with the external rhythmic stimulation, and finally realizes the synchronization of brain neural oscillation and external rhythmic stimulation. When the rhythmic stimulation is removed, the synchronous activity phenomenon of the neuron cluster will not disappear immediately, but has a lasting effect. Therefore, in the present invention, when the same-phase sensory stimulation of a specific rhythm (such as auditory, visual or tactile stimulation) is applied to multiple users, based on the neural entrainment phenomenon, the neural oscillations of the corresponding brain areas (such as auditory, visual and motor cortices) among the users are synchronized, and exogenous manipulation of brain synchronization is achieved.

[0026] The beneficial effects of the present invention are:

[0027] 1. The present invention relates to a group brain regulation method and device. The present invention can not only achieve in-phase stimulation of a specific frequency to manipulate the synchronization of brain activities between two or more users, but also has low cost, simple operation, flexible use, high user acceptance and easy popularization.

[0028] 2. The present invention proposes a group brain regulation method and device based on multimodal sensory stimulation. The invention synchronizes the brain oscillation activities of two or more users by implementing the same-phase sensory stimulation (auditory, visual or tactile stimulation) of a specific frequency to achieve exogenous manipulation of inter-brain synchronization.

[0029] 3. The present invention manipulates the synchronization of brain activities by implementing in-phase sensory stimulation of a specific frequency to the user, which makes up for the problems faced by existing group brain regulation methods based on electrical stimulation (such as transcranial alternating current stimulation), such as high cost, complex operation, low user acceptance, and limited promotion and application. It is expected to provide a practical technical means to promote interpersonal interaction. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the implementation process of the present invention;

[0031] Figure 2 Schematic diagram of the group brain regulation method based on multimodal sensory stimulation of the present invention;

[0032] Figure 3 This is a schematic diagram of the experimental process of group brain regulation based on tactile stimulation according to an embodiment of the present invention;

[0033] Figure 4 This is a schematic diagram of the experimental process of group brain regulation based on visual stimulation according to an embodiment of the present invention;

[0034] Figure 5 This is a schematic diagram of the experimental process of group brain regulation based on auditory stimulation according to an embodiment of the present invention;

[0035] Figure 6 Schematic diagram of the experimental process of group brain regulation based on multimodal sensory stimulation according to an embodiment of the present invention. DETAILED DESCRIPTION

[0036] The present invention is described in detail below in conjunction with specific implementation cases. The following implementation cases will help those skilled in the art to further understand the present invention, but will not limit the present invention in any form.

[0037] The basic idea of ​​the embodiment of the present invention is to manipulate brain synchronization by applying in-phase sensory stimulation of a specific frequency to two or more people. The embodiment of the present invention provides a group brain regulation method and device based on multimodal sensory stimulation, such as Figure 2 As shown, the invention includes group brain regulation based on auditory, tactile and visual stimulation, and the specific implementation steps are as follows Figure 1 As shown:

[0038] Step S1: First, a near-infrared brain function imaging device is worn on the user's head to collect the user's brain activity signals and obtain the user's inter-brain synchronization baseline level;

[0039] The near-infrared brain function imaging device in step S1 comes from the same near-infrared brain function imaging system, which is used to collect the user's brain activity signal based on the hyperscanning technology. During the collection of the user's brain activity signal, the user needs to rest and empty his mind, while keeping his head and body from moving significantly to ensure good quality of the recorded signal.

[0040] The collected brain activity signals first need to be preprocessed, that is, principal component analysis is used to remove system noise caused by breathing, blood pressure changes, etc. in the signal; then, the wavelet transform coherence method (wavelet-transform coherence) is used according to the user's brain activity signals to calculate the time-frequency domain correlation between the brain activity time series of the two users, and obtain the brain synchronization results between the users.

[0041] Step S2, applying multimodal sensory stimulation to all users, and then obtaining the brain synchronization results of the users after applying the multimodal sensory stimulation;

[0042] The multimodal sensory stimulation in step S2 includes one or more of auditory stimulation, tactile stimulation and visual stimulation. The auditory stimulation is implemented by having the user wear headphones; the tactile stimulation is implemented by having the user wear a micro vibrator; and the visual stimulation is implemented by using a computer display screen to present a flashing blank screen stimulation to the user.

[0043] It should be noted that before implementing the stimulation, the phase (same phase) and frequency (such as 6Hz, corresponding to the theta frequency band in the EEG signal) of the stimulation presentation need to be set. When implementing the stimulation, near-infrared hyperscanning technology is used to record the user's brain activity signals, and the user is instructed not to communicate verbally or non-verbally.

[0044] After the implementation of group brain control in step S2 is completed, the user is again instructed to take a rest, empty his mind, and keep his head and body from moving drastically, while the user's brain activity signal is collected; then principal component analysis is used to preprocess the brain activity signal, and finally wavelet transform coherence analysis is used to obtain the brain synchronization results between users.

[0045] Step S3: Based on the inter-brain synchronization results of the user before and after the multimodal sensory stimulation is implemented, a visualization report is provided to the user reflecting the improvement of inter-brain synchronization before and after the group brain regulation.

[0046] Based on the inter-brain synchronization results of users before and after the implementation of multimodal sensory stimulation, a schematic diagram of the results was drawn to present the improvement of inter-brain synchronization before and after group brain regulation, and to illustrate the potential functional role of inter-brain synchronization.

[0047] Combine the following Figures 3 to 6 The present invention is described in detail with reference to four preferred embodiments.

[0048] like Figure 3 As shown, the group brain regulation method based on tactile stimulation in the present invention will be described in detail.

[0049] The experiment mainly includes three stages: 1. Obtain the baseline level of brain-to-brain synchronization of the two subjects (5 minutes). 2. Implement tactile stimulation of specific frequency and phase to the subjects (5 minutes) to manipulate the brain-to-brain synchronization of the subjects. 3. Obtain the brain-to-brain synchronization results of the two subjects again (5 minutes). It should be noted that during the entire experiment, the two subjects need to wear signal acquisition devices from the same near-infrared brain functional imaging system to record their brain activity signals for calculating the brain-to-brain synchronization value. The specific steps are as follows:

[0050] Step 1: Two subjects were equipped with near-infrared brain imaging equipment. The main brain areas measured were the left prefrontal lobe and temporo-parietal region. The subjects were arranged to rest (no communication) and were instructed to empty their minds and keep their heads and bodies as still as possible to collect good-quality brain activity data as a baseline.

[0051] Principal component analysis was used to preprocess the brain activity signals to remove system noise caused by breathing, blood pressure changes, etc.; wavelet-transform coherence analysis was used to calculate the time-frequency domain correlation between the subjects' brain activity time series to obtain the subjects' inter-brain synchronization baseline level.

[0052] Step 2: The two subjects were fitted with micro-vibrators of the same model on their right index fingers. The micro-vibrators were used to generate vibrations at a specified frequency (e.g., 6 Hz) and phase (same phase), and group brain regulation based on tactile stimulation was implemented to manipulate the synchronous neural activity of the motor cortex of the brain. The subjects were instructed not to communicate verbally or non-verbally during the regulation period.

[0053] Step 3: Arrange the subjects to rest again, and collect brain activity signals from their left prefrontal lobe and temporal-parietal lobe at the same time; use principal component analysis to preprocess the brain activity signals; use wavelet transform coherence analysis method to calculate the brain activity time series of the two subjects, and obtain the inter-brain synchronization results of the subjects after group brain regulation.

[0054] Step 4: Based on the inter-brain synchronization results of the subjects before and after the implementation of tactile stimulation, a schematic diagram of the results is drawn to present the improvement of inter-brain synchronization before and after group brain regulation, and explain the potential functional role of inter-brain synchronization, providing the subjects with a visual report reflecting the improvement of inter-brain synchronization before and after group brain regulation.

[0055] like Figure 4 As shown, the group brain regulation method based on visual stimulation in the present invention will be described in detail.

[0056] The experiment mainly includes three stages: 1. Obtain the baseline level of brain-to-brain synchronization of the two subjects (5 minutes). 2. Implement visual stimulation of specific frequency and phase to the subjects (5 minutes) to manipulate the brain-to-brain synchronization of the subjects. 3. Obtain the brain-to-brain synchronization results of the two subjects again (5 minutes). It should be noted that during the entire experiment, the two subjects need to wear signal acquisition devices from the same near-infrared brain functional imaging system to record their brain activity signals for calculating the brain-to-brain synchronization value. The specific steps are as follows:

[0057] Step 1: Two subjects were equipped with near-infrared brain imaging equipment. The main brain areas measured were the prefrontal lobe and parietal-occipital region on both sides of the brain. The subjects were arranged to rest (no communication) and were instructed to empty their minds and keep their heads and bodies as still as possible to collect good-quality brain activity data as a baseline.

[0058] Principal component analysis was used to preprocess brain activity signals to remove system noise caused by changes in breathing and blood pressure. Wavelet transform coherence analysis was used to calculate the correlation between the time-frequency domains of the subjects' brain activity time series to obtain the baseline level of inter-brain synchronization.

[0059] Step 2: Place a computer display screen (with the same model, size, brightness and other parameters) for presenting visual stimuli in front of the two subjects. The visual stimulation is a blank screen stimulus that flashes at a specified frequency (such as 6Hz) and phase (same phase). Implement group brain regulation based on visual stimulation to manipulate the synchronous neural activity of the visual cortex of the brain, and instruct the subjects not to communicate verbally or non-verbally during the regulation period.

[0060] Step 3: Arrange the subjects to rest again, and collect brain activity signals from their prefrontal and parietal-occipital lobes at the same time; use principal component analysis to preprocess the brain activity signals; use wavelet transform coherence analysis method to calculate the brain activity time series of the two subjects, and obtain the inter-brain synchronization results of the subjects after group brain regulation.

[0061] Step 4: Based on the inter-brain synchronization results of the subjects before and after the implementation of visual stimulation, a schematic diagram of the results is drawn to present the improvement of inter-brain synchronization before and after group brain regulation, and explain the potential functional role of inter-brain synchronization, providing the subjects with a visual report reflecting the improvement of inter-brain synchronization before and after group brain regulation.

[0062] like Figure 5 As shown, the group brain regulation method based on auditory stimulation in the present invention will be described in detail.

[0063] The experiment mainly includes three stages: 1. Obtain the baseline level of brain-to-brain synchronization of the two subjects (5 minutes). 2. Implement auditory stimulation of specific frequency and phase to the subjects (5 minutes) to manipulate the brain-to-brain synchronization of the subjects. 3. Obtain the brain-to-brain synchronization results of the two subjects again (5 minutes). It should be noted that during the entire experiment, the two subjects need to wear signal acquisition devices from the same near-infrared brain functional imaging system to record their brain activity signals for calculating the brain-to-brain synchronization value. The specific steps are as follows:

[0064] Step 1: Two subjects were equipped with near-infrared brain imaging equipment. The main brain areas measured were the prefrontal lobe and temporo-parietal region on both sides of the brain. The subjects were arranged to rest (no communication) and were instructed to empty their minds and keep their heads and bodies as still as possible to collect good-quality brain activity data as a baseline.

[0065] Principal component analysis was used to preprocess brain activity signals to remove system noise caused by changes in breathing and blood pressure. Wavelet transform coherence analysis was used to calculate the correlation between the time-frequency domains of the subjects' brain activity time series to obtain the baseline level of inter-brain synchronization.

[0066] Step 2: The two subjects are equipped with headphones of the same model. The headphones are used to play sound stimuli (such as "beep-beep-beep-beep-beep") at a specified frequency (such as 6Hz) and phase (in phase), implement group brain regulation based on auditory stimulation to manipulate the synchronous neural activity of the auditory cortex of the brain, and instruct the subjects not to communicate verbally or non-verbally during the regulation period.

[0067] Step 3: Arrange the subjects to rest again, and collect brain activity signals from their prefrontal and temporal-parietal lobes at the same time; use principal component analysis to preprocess the brain activity signals; use wavelet transform coherence analysis method to calculate the brain activity time series of the two subjects, and obtain the inter-brain synchronization results of the subjects after group brain regulation.

[0068] Step 4: Based on the inter-brain synchronization results of the subjects before and after the implementation of auditory stimulation, draw a schematic diagram of the results to present the improvement of inter-brain synchronization before and after group brain regulation, and explain the potential functional role of inter-brain synchronization, and provide the subjects with a visual report reflecting the improvement of inter-brain synchronization before and after group brain regulation.

[0069] like Figure 6 As shown, the group brain regulation method based on auditory, tactile and visual stimulation in the present invention will be described in detail.

[0070] The experiment mainly includes three stages: 1. Obtain the baseline level of brain-to-brain synchronization of the two subjects (5 minutes). 2. Implement multimodal sensory stimulation of specific frequency and phase to the subjects (5 minutes) to manipulate the brain-to-brain synchronization of the subjects. 3. Obtain the brain-to-brain synchronization results of the two subjects again (5 minutes). It should be noted that during the entire experiment, the two subjects need to wear signal acquisition devices from the same near-infrared brain functional imaging system to record their brain activity signals for calculating the brain-to-brain synchronization value. The specific steps are as follows:

[0071] Step 1: Two subjects were equipped with near-infrared brain imaging equipment. The main brain areas measured were the prefrontal lobe and temporo-parietal-occipital region. The subjects were arranged to rest (no communication) and were instructed to empty their minds and keep their heads and bodies as still as possible to collect good-quality brain activity data as a baseline.

[0072] Principal component analysis was used to preprocess brain activity signals to remove system noise caused by changes in breathing and blood pressure. Wavelet transform coherence analysis was used to calculate the correlation between the time-frequency domains of the subjects' brain activity time series to obtain the baseline level of inter-brain synchronization.

[0073] Step 2: The two subjects are given headphones of the same model, which are used to play sound stimuli at a specified frequency (such as 6 Hz) and phase (in phase). At the same time, two computer screens of the same model are placed in front of the subjects, and the screens are used to present flashing blank screen stimuli at a specified frequency (such as 6 Hz) and phase (in phase). The subjects are also given a miniature vibrator of the same model on their right index finger, which is used to generate vibrations at a specified frequency (such as 6 Hz) and phase (in phase). Group brain regulation based on auditory, visual and tactile stimuli is implemented to manipulate the synchronous neural activities of the auditory, visual and motor cortices of the brain, and the subjects are instructed not to communicate verbally or non-verbally during the regulation period.

[0074] Step 3: Arrange the subjects to rest again, and collect brain activity signals of their prefrontal lobe and temporal-parietal-occipital lobe at the same time; use principal component analysis to preprocess the brain activity signals; use wavelet transform coherence analysis method to calculate the brain activity time series of the two subjects, and obtain the inter-brain synchronization results of the subjects after group brain regulation.

[0075] Step 4: Based on the inter-brain synchronization results of the subjects before and after the implementation of multimodal sensory stimulation, draw a schematic diagram of the results to present the improvement of inter-brain synchronization before and after group brain regulation, and explain the potential functional role of inter-brain synchronization, and provide the subjects with a visual report reflecting the improvement of inter-brain synchronization before and after group brain regulation.

[0076] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A method for controlling the group brain based on multimodal sensory stimulation, characterized in that: The following steps are involved: Step S1: First, multiple users are placed on the head with near-infrared brain function imaging equipment to collect the users' brain activity signals and obtain the users' brain synchronization baseline levels; Step S2, applying multimodal sensory stimulation to all users, and then obtaining the brain synchronization results of the users after applying the multimodal sensory stimulation; Step S3: Based on the inter-brain synchronization results of the user before and after the multimodal sensory stimulation is applied, a visualization report is provided to the user reflecting the improvement of the inter-brain synchronization before and after the group brain regulation.

2. The method for controlling the group brain based on multimodal sensory stimulation according to claim 1, characterized in that: The near-infrared brain function imaging device in step S1 is used to collect brain activity signals of multiple users, and then obtain the brain synchronization results between the users according to the brain activity signals of the users. The method for obtaining the brain synchronization results is as follows: Firstly, the coherence between the brain activity signals of the two users is obtained by using the wavelet transform coherence analysis method, and then the coherence between the two brain activity signals is used as the inter-brain synchronization result between the two users.

3. The method for controlling the group brain based on multimodal sensory stimulation according to claim 1, characterized in that: In step S1, the baseline level of the user's brain synchronization is specifically the user's brain synchronization result before the multimodal sensory stimulation is applied.

4. The method for controlling the group brain based on multimodal sensory stimulation according to claim 1, characterized in that: The step S2 is specifically as follows: first, multimodal sensory stimulation is applied to all users, and after the multimodal sensory stimulation is completed, the brain activity signals of the users are collected using near-infrared brain functional imaging equipment, and then the brain synchronization results between the users after group brain regulation are obtained based on the brain activity signals of each user.

5. The method for controlling the group brain based on multimodal sensory stimulation according to claim 1, characterized in that: The multimodal sensory stimulation in step S2 includes one or more of rhythmic auditory stimulation, rhythmic tactile stimulation and rhythmic visual stimulation.

6. The method for group brain regulation based on multimodal sensory stimulation according to claim 1, characterized in that: Applying multimodal sensory stimulation to all users in step S2 specifically includes: applying multimodal sensory stimulation with the same frequency and phase to all users.

7. A group brain control device for implementing the multimodal sensory stimulation method of any one of claims 1 to 6, characterized in that: Including near-infrared brain function imaging equipment for obtaining the user's brain activity signals; including a signal processing module for obtaining inter-brain synchronization results between users based on brain activity signals of the users; A multimodal sensory stimulation device is included for applying multimodal sensory stimulation to all users, wherein the multimodal sensory stimulation includes one or more of auditory stimulation, tactile stimulation and visual stimulation; It includes a visualization output module for outputting a visualization report on the improvement of the brain synchronization of the user group before and after brain regulation according to the brain synchronization results of the users before and after the application of multimodal sensory stimulation.

8. The multi-modal sensory stimulation group brain control device according to claim 7, characterized in that: The multimodal sensory stimulation device comprises headphones, a vibrator and a computer display screen, wherein the headphones are used to apply synchronous auditory stimulation to multiple users, the vibrator is used to apply synchronous tactile stimulation to multiple users, and the computer display screen is used to apply synchronous visual stimulation to multiple users.

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