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DISPOSITIF D'ÉVALUATION DE L'ACTIVITÉ DE FONCTION CÉRÉBRALE ET SYSTÈME D'ÉVALUATION À L'AIDE DE CELUI-CI
专利权人:
INC.;BRAIN FUNCTIONS LABORATORY
发明人:
MUSHA, TOSHIMITSU
申请号:
EP14759461
公开号:
EP2965690A4
申请日:
2014.03.03
申请国别(地区):
EP
年份:
2016
代理人:
摘要:
Discrete Fourier transform is performed on an output of each of brain potential sensors, which measure a brain potential of a subject, for each of segments in order to obtain a discrete Fourier coefficient that has a frequency component, which is an integral multiple of a fundamental frequency that is an inverse number of a predetermined time width, within a predetermined frequency band. A mean value of squares of absolute values of Fourier coefficients is obtained. The Fourier coefficients are normalized using the mean value of the squares of the absolute values thereof in order to obtain a normalized power spectrum (NPS;j,m) that is a first parameter. A product of mean values of squares of absolute values of Fourier coefficients of adjoining frequency components in all the segments is normalized using a square value of the sum of the mean values of the adjoining frequency components in order to obtain a normalized power ratio (NPV;j,m) that is a second parameter. Two markers sNAT;j,m and vNAT;j,m are derived from the first and second parameters respectively in order to evaluate a brain function activity level.
来源网站:
中国工程科技知识中心
来源网址:
http://www.ckcest.cn/home/

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