Electroencephalogram source localization method based on granger causality

An electroencephalogram source localization method based on granger causality includes the steps: recording scalp electroencephalogram signals of a plurality of leads by an electroencephalogram acquisition device and performing elementary pretreatment; respectively analyzing the granger causality among each lead and the other leads by taking each lead as an observation lead, and performing source localization among the leads according to causality indexes; counting the number of the leads capable of becoming sources, and calculating the possibility index of taking each lead capable of becoming a source as a whole brain source area to realize whole brain source localization. The electroencephalogram source localization method solves the problems of poor electroencephalogram source localization stability and uniqueness, and the possibility of taking each lead as the whole brain source area can be obtained, so that whole brain source localization is realized. Instability and non-uniqueness of solutions of electroencephalogram inverse problems can be improved to a certain extent. The electroencephalogram source localization method can be used for determining a cranial nerve system disease focus portion, localizing a neurosurgery operation and performing electroencephalogram source localization and tracking in recognition tasks, and has an important significance in scientific research and clinical practice.