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Electroencephalogram source localization method based on granger causality

A technology of Granger causality and brain power location, applied in the field of brain power location, can solve problems such as the idea of ​​information flow direction location between leads that has not been proposed

Active Publication Date: 2015-01-28
INST OF BIOMEDICAL ENG CHINESE ACAD OF MEDICAL SCI
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Problems solved by technology

Previous Granger causality analysis has not been applied to brain power source location, and source location technology has not yet proposed a location idea based on information flow between leads

Method used

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  • Electroencephalogram source localization method based on granger causality
  • Electroencephalogram source localization method based on granger causality
  • Electroencephalogram source localization method based on granger causality

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Embodiment Construction

[0037] A Granger causality-based brain power location method of the present invention will be described in detail below with reference to the embodiments and the accompanying drawings.

[0038] A method for locating brain power sources based on Granger causality of the present invention first utilizes EEG acquisition equipment to record multi-conductor scalp EEG signals, and performs preliminary preprocessing; secondly, analyzes the relationship between each lead and other leads. Granger causality, according to the causality index to determine the possibility index of the mutual source between the leads; finally count the number of leads that can be the source of other leads, and estimate the possibility of each lead as the source area of ​​the whole brain, Realize whole brain source localization.

[0039] Granger causality is used to explore the information flow between variables. It is a research method based on probability theory. In actual operation, a univariate autoregre...

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Abstract

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.

Description

technical field [0001] The invention relates to a method for locating brain power sources. In particular, it involves a method of source localization between leads by calculating the causality index of each lead and all other leads in the whole brain, counting the number of leads that can be the source of other leads, and obtaining each lead as a brain source. The possibility index of the source area, the brain power source localization method based on Granger causality to realize the whole brain source localization. Background technique [0002] In recent years, a variety of brain and nervous system diseases (such as depression, cerebral apoplexy, and epilepsy, etc.) have shown the characteristics of high morbidity, difficulty in curing, and high mortality. One of the important factors is the uncertainty of the lesion site. Cure the disease at its source. Brain source localization technology is a professional technology for locating and tracking the activity of the nerve ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/0476
CPCA61B5/369
Inventor 殷涛王欣刘志朋靳静娜李松
Owner INST OF BIOMEDICAL ENG CHINESE ACAD OF MEDICAL SCI
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