63 results about "Brain electrical activity" patented technology

A system for accessing the brain of a subject to record and / or stimulate brain stares thereof. The system includes control means, first accessing means having a plurality of contact surfaces configured to operatively connect the control means to the brain of the subject to provide three-dimensional stimulation thereof; second accessing means having a plurality of contact surfaces to operatively connect the control means to the brain of the subject to provide access thereto for the purposes of obtaining three-dimensional recordings of the brain electrical activity of the subject; and a waveform bank containing a plurality of stimulating waveforms. The control means is configured to operatively apply a first at least one of the stimulating waveforms of the waveform bank to the brain of the subject through the first accessing means and to assess acceptability within defined limits, as determined by preset criteria, of the subject's response to the application of the at first least one of the stimulating waveforms.

A head set (2) comprises a brain electrical activity (EEG) sensing device (3) comprising EEG sensors (22) configured to be mounted on a head of a wearer so as to position the EEG sensors (22) at selected positions of interest over the wearers scalp, the EEG sensing device comprising a sensor support (4) and a flexible circuit (6) assembled to the sensor support. The sensor support and flexible circuit comprise a central stem (4a, 6a) configured to extend along a center plane of the top of the head in a direction from a nose to a centre of the back of a wearers head, a front lateral branch (4b, 6b) configured to extend across a front portion of a wearer's head extending laterally from the central stem, a center lateral branch (4c, 6c) configured to extend across a top portion of a wearer's head essentially between the wearer's ears, and a rear lateral branch (4d, 6d) configured to extend across a back portion of a wearer's head. The sensor support (4) comprises a base wall (401) and side walls (402) extending along edges of the base wall to form an essentially flat “U” shaped channel (403) in which the flexible circuit (6) is inserted and the base wall comprise EEG sensor orifices (404) to allow access to the EEG sensor contacts or electrodes on the flexible circuit.

Electrical activity of the brain (EEG) and position / motion of a body part, e.g. motion of an arm, are measured. A virtual representation of either the moving body part or the intended movement as determined from the brain activity is presented as feedback to the subject on a display which can be implemented as a head-up display. A clock module is operable to time stamp information transferred from a brain electrical activity sensing system and a position / motion detection system for joint processing. This non-invasive EEG-based brain-computer-interface is particularly useful for stroke rehabilitation.

The invention relates to a children ASD diagnosis device based on a magnetoencephalogram and an electroencephalogram. The children ASD diagnosis device comprises a magnetic shielding system, a head-mounted electroencephalogram and magnetoencephalogram array type sensor system, an electroencephalogram and magnetoencephalogram data acquisition system, a sensory stimulation system, a signal processing system and a data analysis system. The magnetic shielding system can effectively reduce background magnetic field noise. The head-mounted electroencephalogram and magnetoencephalogram array type sensor system can carry out whole-brain collection on a tested child in a combined nesting mode. The electroencephalogram and magnetoencephalogram data acquisition system can record brain electrical activity information. The sensory stimulation system can present visual and auditory sensory stimulation for the tested child. The signal processing system removes biological magnetic noise and backgroundmagnetic noise. The data analysis system can extract pathological features in the signals for analysis. The children ASD diagnosis device provided by the invention has the advantages of high sensitivity and specificity, multiple information sources, high signal quality, easy acceptance by children and the like. The children ASD diagnosis device has the advantages of high sensitivity and specificity in the aspect of ASD diagnosis of children.

A headset for detecting brain electrical activity may include a flexible substrate having first and second ends each configured to engage an ear of a subject and dimensioned to fit across the forehead of a subject. The headset may also include a plurality of electrodes disposed on the substrate and configured to contact the subject when the headset is positioned on the subject. First and second electrodes may contact top center and lower center regions of the forehead, respectively, third and fourth electrodes may contact front right and front left regions of the forehead, respectively, fifth and sixth electrodes may contact right side and left side regions of the forehead, respectively, and electrodes included within the securing devices may contact the ear regions. The third and fourth electrodes may be moveable in at least a vertical direction relative to the other electrodes.

This disclosure describes the methods, devices, and systems of treating diseased tissue with integrated nanosecond pulse irreversible electroporation. Methods and systems as disclosed provide MRI compatible shielded electrodes and electrode leads to prevent emanating radiofrequency noise and improve image quality, disconnecting the electrode from the cable linkage to the pulse generator reduce electromagnetic interference and image artifacts, placing electrodes strategically within a guide cannula to minimize distortion from heterogeneities or maximize ablation within the tissue, utilizing conductive fluids, innate or external, such as cerebral spinal fluid or grounding pads to provide a pathway for current return, and for timing of the electrical waveforms with inherent brain electrical activity.

The invention provides a method of estimating cerebral sources of electrical activity from a small subset of EEG channels utilizing existing methods to provide a 3-dimensional, discrete, distributed, linear solution to the inverse problem using inputs consisting of a small number of EEG channels (e.g., 4 channels) augmented with synthetic EEG data for the other channels. The resultant image of cerebral electrical activity in the region of the EEG channels from which data is recorded is of comparable spatial resolution in the corresponding region to images of cerebral electrical activity obtained using a complete set of EEG channels (e.g., using 24 channels).

Systems and methods for the detection of pathological conditions in a brain analyze signal properties of the brain electrical activity recordings. The pathological conditions to be detected include the occurrence of a seizure event. The systems and methods calculate a seizure susceptibility index (SSI) for real time brain function monitoring and for a pre-screening process of seizure detection.

A system or method can facilitate source localization of brain electrical activity. In one example, an expert system can be utilized to evaluate the source localization results and, based on the acceptability of the results, adjust a data preparation phase to provide for acceptable source localization.

A method and apparatus for preventing or terminating seizures, by stimulating a brain with at least two implanted electrodes, each implanted in a different one of at least two regions of the brain, with a frequency to emulate neuronal synchrony. Upon detecting a potential or actual seizure occurrence, the frequency is electrically applied to the brain upon the detection to preempt or terminate the potential or actual seizure occurrence. Parts in the brain, where brain electrical activity is being measured, that have the highest connectivity are determined by phase-locking coherence. The select subset of areas showing synchrony, i.e., only those with the highest coherence that will best permit inducing a large global synchrony, are stimulated to preempt or terminate the potential or actual seizure occurrence.

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 present disclosure provides a system for analyzing brain electrical activities of at least one brain. The system comprises a visual output module for rendering a visual output space according to analyzed data sets generated by an analysis module, and displaying a visual output. The visual output comprises a first axis representing FM, a second axis representing AM, and a plurality of visual elements defined by the first axis and the second axis. Each of the visual elements comprises an accumulated signal strength and the analyzed data sets. Each of the analyzed data sets comprises a plurality of analyzed data units collected over a time period.

The present invention discloses methods and systems for monitoring and evaluating brain electrical activity. Methods are provided for obtaining local synchrony information relating to regions of a brain. Methods are provided that include obtaining EEG information from an infant subject, and using the obtained EEG information in obtaining local coherence information. A mathematical technique or computer algorithm can be used to process the EEG information in order to reduce residual volume conduction error in the obtained local coherence information.