METHOD FOR IDENTIFYING HUMAN'S STATE OF DOUBT BASED ON CEREBRAL ACTIVITY Russian patent published in 2019 - IPC A61B5/04 A61B5/16 

FIELD: physics.

SUBSTANCE: invention relates to digital processing and data analysis and is intended for detecting and evaluating characteristics of states of doubt of a person on multichannel recordings of electrical or magnetic activity of a neural ensemble of a brain using an artificial neural network. Disclosed is a method for determining the duration of the process of making a decision on multichannel activity records of the brain based on an artificial neural network, consisting in the fact that a neuropsychological experiment is carried out, in which a person being tested is suggested to solve cognitive tasks of various degree of complexity with various possible solutions, using the sensors, recording the multichannel activity signal of the neural network of the person being tested in cognitive tasks, in the pre-processing unit, the obtained multichannel signal is filtered in range of 5 to 30 Hz, artefacts associated with heartbeat, respiration, blinking and eye movement are removed, selecting from the received signal segments corresponding to the decision making process, normalizing the sections of the multichannel signal in the range [-1, 1] on each channel, INS training unit comprises training sampling for artificial neural network based on sections of multichannel signal corresponding to solving problems of minimum complexity, using it trained artificial neural network to classify brain states corresponding to different solutions of cognitive tasks, in the INS classification unit, an artificial neural network is used to process sections of multichannel signals not included in the training sample, a response of the artificial neural network is averaged on tasks with the same complexity, decision time interval is selected, where the response of the INS receives intermediate values which do not correspond to any of the predefined classes of brain states, determine the quantitative characteristic of the rate of human decision making in conditions of ambiguity of selection as the duration of the decision making time interval.

EFFECT: invention provides the possibility of identifying the doubt state and determining its duration by using the INS apparatus to process the multichannel cerebral activity records.

1 cl, 3 dwg