31 results about "Electrical brain activity" patented technology

Methods and systems for long term monitoring of one or more physiological parameters such as respiration, heart rate, body temperature, electrical heart activity, blood oxygenation, blood flow velocity, blood pressure, intracranial pressure, the presence of emboli in the blood stream and electrical brain activity are provided. Data is acquired non-invasively using ambulatory data acquisition techniques.

The invention relates to a method for detecting a physiological state of a patient deviating from a reference physiological state, in which, after having determined, in each of Q frequency bands, R reference matrices PRq,r with qe[1 . . . Q] and rε[1 . . . R] which correspond to the reference physiological state, the following steps are repeated in a loop: carrying out measurements, in M time segments, of an electroencephalographic signal; filtering and centering the measurements in Q frequency bands to obtain and determine M×Q scaled matrices of spatial covariance; for each time segment m, calculating a deviation from the reference physiological state, and comparing each of the deviations from the reference physiological state to a predefined threshold. The invention also relates to a monitoring device applying said method.

An electronic training system includes a set of external response sensors and a set of internal response sensors, and control circuitry. The control circuitry is configured to track locomotion and body movements of a user from the set of external response sensors in a sporting event, and electrical brain activity and physiological changes in a body of the user from the set of internal response sensors in a sporting event. Tracked data in the sporting event is annotated as period-of-relevance and period-of-irrelevance. A first sports performance state is assigned to the user for the sporting event based on a combination of a user feedback and sports statistics. The control circuitry outputs a first integrated visual motion model on a display device based on annotated tracked data in the period-of-relevance such that the first sports performance state of the user for the sporting event is discernible by a viewer.

A sensor system and process for measuring electromagnetic activity of a brain are provided. The system and process employ a sensor assembly having a plurality of electrodes arranged in a closely spaced arrangement and a processor to determine a weighted average of the signals indicative of an electric field generated by electromagnetic activity of the brain. The system provides a medical body area network of a subject including one or more of the sensor assemblies and one or more additional sensors, which may be within a smartphone or other wearable device.

The invention discloses an individual identification method for the specificity of cortex electroencephalogram signals in operation. The method comprises the following steps: 1, collecting ECoGs of four points of an individual movement area, a language area, a sensory area and a non-functional area determined through ECS, and ECoGs leading to the operative region 64 / 128 of the same individual, and carrying out pretreatment and feature extraction on the ECoGs, thus obtaining feature samples; 2, carrying out model training and optimizing by utilizing the feature samples of the ECoGs of the four points determined through ECS, and thus the individual optimal identification model is trained; and 3, classifying the feature samples of the ECoGs leading to the operative region 64 / 128 of the same individual by utilizing the individual optimal recognition model trained in the step 2, so that the attributes of all the lead signals are obtained, and the specific recognition for the ECoGs of each brain function region of the individual is completed. With the adoption of the method, the ECOGs of different functional states can be quickly, accurately and comprehensively identified, so that powerful assistance is provided for identifying the electroencephalogram activities in different functional states.

A device for monitoring the electro-physiological activity of a subject, particularly for diagnosing or monitoring epilepsy, including:measurement element for measuring electrical brain activity;measurement element for measuring the electrical activity of the muscles of mastication;an acquisition module configured to acquire in synchronously the signals measured by the measurement element for measuring electrical brain activity and by the measurement element for measuring the electrical activity of the muscles of mastication;a signal processing modules; anda transmission module for transmitting the electrical signals acquired by the acquisition module to the signal processing module.The signal processing module is configured to detect among the signals measured by the measurement element for measuring electrical brain activity the signals measured by the measurement element for measuring the electrical activity of the muscles of mastication.

The invention discloses the application of a flexible transparent carbon nanotube nerve electrode array in a nerve electro-optical interface. The invention utilizes the characteristics that the carbon nanotube electrode array has high light transmittance in a wide wavelength range, and can still maintain excellent electrochemical properties and optical properties in a stretched state, and realizes electrophysiological signals of cortical epilepsy and two-photon Simultaneous in situ recording of calcium imaging, and real-time recording of EEG under photostimulation, allow observation of neural activity with high temporal / spatial resolution. Utilizing the superior flexibility and extensibility of the carbon nanotube electrode array, it can be used for real-time monitoring of brain electrical activity under brain injury; at the same time, the carbon nanotube electrode array can fit perfectly with the tissue to form a more efficient brain / The electrode interface is conducive to the improvement of the signal-to-noise ratio. The above results all reflect the great application potential of carbon nanotube electrode arrays in the nervous system, especially in the electro-optical interface of mechanically active systems.

The invention discloses a portable brain function biofeedback instrument, comprising a calculation analysis module, a human-computer interaction module, a storage module and a control module which are sequentially connected with each other. The calculation analysis module consists of an electroencephalophone measurement lead of an input sensor connecting with a human body, an amplifying and frequency-selecting module, a lead drop-off automatic detection module, a screen drive and right leg drive module, an A / D sampling and converting module and a DSP; the human-computer interaction module consists of a touch screen and a speaker; the storage module consists of an standard deviation (SD) card; and the control module consists of an embedded ARM micro-processor. The calculation analysis module realizes extraction of alpha wave, beta wave and theta wave of a characteristic electroencephalophone component to give an electroencephalophone active mode; and the storage module realizes storageof data and an analysis result. The portable brain function biofeedback instrument feeds back the electroencephalophone information to a trainee through detecting the electroencephalophone information by an engineering technology, and generates the lasting effect through a repeated training to enable the brain to develop towards a normal and healthy level. An electroencephalophone biofeedback therapy can further and fully mobilize the internal potential of the trainee so that the trainee actively participates in the treatment.

A system and method for generating frequency-multiplexed synthetic sound-speech stimuli and for detecting and analyzing electrical brain activity of a subject in response to the stimuli. Frequency-multiplexing of speech copora and synthetic sounds helps the composite sound to blend into a single auditory object. The synthetic sounds are temporally aligned with the utterances of the speech corpus. Frequency multiplexing may include splitting the frequency axis into alternating bands of speech and synthetic sound to minimize the disruptive interaction between the speech and synthetic sounds along the basilar membrane and in their neural representations. The generated stimuli can be used with both traditional and advanced techniques to analyze electrical brain activity and provides a rapid, synoptic view into the functional health of the early auditory system, including how speech is processed at different levels and how these levels interact.

A system and method for generating frequency-multiplexed synthetic sound-speech stimuli and for detecting and analyzing electrical brain activity of a subject in response to the stimuli. Frequency-multiplexing of speech copora and synthetic sounds helps the composite sound to blend into a single auditory object. The synthetic sounds are temporally aligned with the utterances of the speech corpus. Frequency multiplexing may include splitting the frequency axis into alternating bands of speech and synthetic sound to minimize the disruptive interaction between the speech and synthetic sounds along the basilar membrane and in their neural representations. The generated stimuli can be used with both traditional and advanced techniques to analyze electrical brain activity and provides a rapid, synoptic view into the functional health of the early auditory system, including how speech is processed at different levels and how these levels interact.

A method and apparatus for locating tracts of electrical brain activity. A source localization procedure may be performed including solving the inverse problem subject to one or more constraints resulting from a tractographic procedure, and a tractographic procedure may be performed that includes obtaining a probabilistic assessment of tract connectivity that takes account of the results of a source localization procedure.

In some embodiments, the present invention provides an exemplary inventive system that includes: an apparatus to record: individual's brain electrical activity, a physiological parameter of the individual, and iii) an environmental parameter; a computer processor configured to perform: obtaining a recording of the electrical signal data; projecting the obtained recording of electrical signal data onto a pre-determined ordering of a denoised optimal set wavelet packet atoms to obtain a set of projections; normalizing the particular set of projections of the individual using a pre-determined set of normalization factors to form a set of normalized projections; determining a personalized mental state of the individual by assigning a brain state; determining a relationship between: the physiological parameter, the environmental parameter, and the personalized mental state; generating an output, including: a visual indication, representative of the personalized mental state, and) a feedback output configured to affect the personalized mental state of the individual.

The method for producing cerebral scalp potential graph relates to a formation method of potential information graph, and includes the following steps: according to the electroencephalic original data collected from different lead electrodes on the head portion and non-linear linetic theory utilizing phase space reconstitution technique to form scalp potential information transmission matrix between leads, then plotting the scalp topological distribution graph-electroencephalic information map (BIM) according to the information transmission quantity of every lead and time sequence complexity data and using a full-new angle to continuously reflect time space characteristics of electroencephalic activation to observe the change process of human brain function state. Said invention can be used for making scalp electroencephalic dianosis in the reseach of epileptic focus location and induced response, also can be used for EEG signal analysis of brain being in different physiological conditions or senile dementia patient.