10 results about "Stimulus response" patented technology

Provided are an optical measurement device, an optical measurement method, a data processing device, and a program, capable of generating data that is a stimulus value that takes into account the time response of an eye and suppresses waveform distortion, capable of performing good flicker measurement, and also capable of coping with a measurement target object having a non-periodic light emission waveform. A stimulus value acquisition unit (20) receives light from a measurement target object to continuously acquire intensities corresponding to stimulus values at constant time intervals; a response characteristic acquisition unit (32) acquires a pulse response characteristic from a storage unit (31) that stores a pulse response characteristic corresponding to a visual stimulus response; and a digital filter processing unit (32) performs digital filter processing on continuous data of the acquired stimulus value intensities using the acquired pulse response characteristic to generate data on which a visual stimulus response is superimposed.

The embodiment of the invention discloses a testing device. The testing device comprises a cable, a connecting assembly and a stimulating assembly which are connected in sequence. Wherein the connecting assembly is provided with a limiting groove for limiting and fixing the implantable electrode, a plurality of conductive elastic sheets in conductive connection with the cable are arranged in the limiting groove, and the conductive elastic sheets are used for being detachably and electrically connected with a wire of the implantable electrode, so that the implanted implantable electrode is tested. The stimulation assembly is provided with a conductive probe electrically connected with the cable, and can apply a test electric signal to the nervous tissue to carry out a stimulation reaction test, thereby assisting in accurately confirming the position of the target spot. According to the testing device, the electrode testing function and the nerve stimulation testing function are integrated into a single device, the structure is compact, operation is visual, and the accuracy, smoothness and convenience of an operation are remarkably improved.

The invention relates to the technical field of brain-computer signal classification, in particular to a brain-computer interface signal classification method, electronic equipment and system, and the method comprises the steps: collecting brain-computer interface signals and the acceleration of a user, dividing a stimulation reaction time period and a result time period, and determining local maximum stimulation; the partial maximum stimulation deviation amplitude in the stimulation reaction time period and the deviation amplitude evaluation and value of the stimulation reaction time period and the result time period are determined, and the partial maximum stimulation collected in the pulse collection time period is updated according to the deviation amplitude evaluation and value of the stimulation reaction time period and the result time period; and acquiring a fitting curve of the brain-computer interface signals in the acquisition time period according to the brain-computer interface signals and the accelerations at the beginning moment and the last acquisition moment of the acquisition time period and the updating result of the local maximum stimulation. The information in the brain activity signal can be accurately extracted, and the intention of the user can be accurately recognized.

The invention discloses a sensory / motor neuron differentiated neural restoration catheter based on controllable release of metal ions triggered by ultrasound. The SF / metal ion neural restoration conduit with an ultrasonic piezoelectric and directional topological structure is developed by combining a one-pot method with an electrostatic spinning process. Wherein the oriented structure of the SF spinning membrane can promote the directional migration of cells and the directional extension of axons while being physically guided; and the material can also be used as a stimulation response platform to generate piezoelectricity under the ultrasonic action, so that the controllable release of metal ions is realized. The released metal ions (such as Zn2, Cu2, K, Mg2 and the like) can accurately program cell behaviors by activating intracellular signal transduction pathways in sensory / motor neurons in the neural restoration process. Expression of neurotrophic factors and receptors of the neurotrophic factors can be differentially up-regulated or inhibited, and other possibilities are provided for differentiated regeneration of sensory / motor neurons.

A method for analyzing a user's reaction to a stimulus is described which includes providing a user stimulus and a stimulation parameter through a sensory stimulator, measuring a biological response and acquiring a biosignal which indicates a neurophysiological reaction provides neurophysiological reaction data which generates sensory metadata indicative of the user's response to the corresponding stimulus. The sensory metadata is archived to obtain a plurality of sensory metadata associated with the user. Each piece of stored sensory metadata is processed according to input information, generating an output information including a reaction index to the stimulus as a function of the input information, and modifying a stimulation parameter according to the reaction index.

A system and method for anti-phased binocular stimulation may include a device for determining a target frequency for the stimulus response. The device may output a first visual stimulus to the first eye at a first frequency and a first phase. The device may output a second visual stimulus to the second eye at a second frequency and a second phase. Both the first and second visual stimuli may produce a stimulus response at a target frequency. The first frequency may be half of the target frequency, and the second frequency may be half of the target frequency.

The invention discloses an anthropomorphic robot facial expression control method, device and equipment, a medium and a product, and relates to the technical field of anthropomorphic humans. The method comprises the following steps: firstly, receiving an external expression trigger instruction, then planning a corresponding facial expression action sequence, specifically, when each facial expression action in the sequence is planned, actively inserting a silence delay before executing the action, the duration of the silence delay being the duration from instruction receiving to action execution starting, and the duration of the silence delay being the duration from instruction receiving to action execution starting. The ratio of the stimulation-reaction delay to the execution duration of the corresponding action is controlled within a preset interval, and finally the robot face execution mechanism is driven based on the sequence to complete the expression, so that the mechanical and abrupt feeling caused by transient response in the prior art is overcome by actively introducing and quantitatively controlling the proportion of the stimulation-reaction delay to the action duration, and the safety of the robot is improved. And the natural cognitive processing rhythm of human is simulated, so that the facial organ movement of the robot better conforms to the movement mode and reaction rule of human, and the expression naturalness and life feeling are remarkably improved.

This invention discloses a method for assessing motor cortical excitability based on threshold-tracking magnetic stimulation, relating to the field of biomedical engineering technology. The method includes the following steps: electrical stimulation of the median nerve in the subject's wrist; recording on the abductor pollicis brevis (APB) muscle; recording the stimulus-response curve; determining the cortical stimulus-response (SR) curve by increasing the magnetic stimulation intensity to the specified levels; calculating the statistical parameters of the mean and standard deviation of the excitability threshold; and determining the dynamic trend of cortical excitability. This invention determines the cortical stimulus-response curve by increasing the magnetic stimulation intensity to the specified levels, and calculates the central motor conduction time based on the stimulus-response curve using the F-wave method, thus completing the initial stimulus and threshold determination. Subsequent threshold tracking is then performed based on this technique, providing an efficient and accurate means of detecting motor cortical function for the diagnosis of neurological diseases.

The invention discloses a cognitive function evaluation method, device, equipment and system, and relates to the technical field of man-machine interaction, and the method comprises the steps: obtaining stimulation response data of a tested object; wherein the stimulation response data is data acquired in the process of presenting the visual stimulation material to the tested object, and the stimulation response data comprises facial image data, eye movement tracking data and stimulation judgment data of the tested object; determining a multi-dimensional cognitive feature index according to the stimulation response data; wherein the multi-dimensional cognitive feature indexes comprise a face reaction index, a sight line index and a judgment accuracy index; according to the multi-dimensional cognitive feature index and a preset reference feature index, determining a cognitive function evaluation result of the tested object; according to the method, the eye movement behavior, the face reaction and the quantitative characteristic index of the judgment accuracy degree of the tested object in the visual stimulation material recognition process can be synthesized, the cognitive function of the tested object can be rapidly and accurately evaluated, and automatic objective evaluation of the cognitive disorder risk is achieved.