An electrical model in which cortical EEG conducts into scalp EEG

Abstract

The invention discloses an electrical model in which cortical EEG conduction is scalp EEG, comprising: meningeal network, skull network, scalp network, recording electrode network and reference electrode network; wherein the meningeal network includes longitudinal meningeal network and transverse meningeal network, which The input terminals are all connected to the ECoG signal of the cerebral cortex; the cranial network includes a longitudinal skull network and a horizontal skull network, and its input terminals are connected to the output terminals of the longitudinal meningeal network; the scalp network includes a vertical scalp network and a horizontal scalp network, and its input terminals are connected Connect to the output of the longitudinal skull network; the input of the recording electrode network is connected to the output of the longitudinal scalp network; the input of the reference electrode network is connected to the output of the transverse meningeal network, transverse skull network, and transverse scalp network; the recording electrode network and the output end of the reference electrode network to form a differential scalp EEG signal. The model takes into account spatial ambiguity and anisotropy, and can more accurately transduce ECoG signals into EEG signals.

Description

technical field [0001] The invention belongs to the technical field of bioelectronics, and in particular relates to an electrical model in which cortical brain electricity conducts into scalp brain electricity considering space fuzzy and anisotropic effects. Background technique [0002] Cortical electroencephalography (ECoG) is derived from the postsynaptic potential of the apical dendrites of the pyramidal cells. It is formed by the sum of the synchronous postsynaptic potentials of a large number of neurons. The formation of the synchronous rhythm is related to the nonspecific projection system of the cortex and thalamus. activities related. Scalp electroencephalogram (EEG) is the electrical wave change of brain activity recorded by recording electrodes after ECoG is transmitted to the scalp through various biological tissues of the head. It is the overall reflection of the electrophysiological activity of brain nerve cells on the surface of the cerebral cortex or scalp. ...

AI Technical Summary

Problems solved by technology

Such a model does not take into account the irregularity of the human (or biological) head shape (not an ideal uniform sphere), and the dissimilarity of different human (or biological) heads, so there are the following two shortcomings: 1) It does not take into account the inconsistency of the conduction path when the cortical EEG in different parts of the head is conducted as scalp EEG, that is, anisotropy; 2) It does not take into account that when the cortical EEG is conducted as scalp EEG The absorption or attenuation of EEG signals in different spatial directions, that is, spatial ambiguity

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