EEG spatially nonlinear interdependence of Chan-meditation practitioners and normal subjects under mental stress test

• Main Author: 林永泰
• Other Authors: 黃經堯
• Format: Others
• Language: en_US
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/05713464395500664880

碩士 === 國立交通大學 === 電子研究所 === 101 === Clinical study has demonstrated that EEG under mental stress has higher frequency than relaxation EEG. This thesis is aimed to investigate the effects of Chan meditation on brain electrophysiological behaviors from the viewpoint of nonlinear interdependence among regional neural networks. Particular emphasis was laid on the EEG beta band. Frequency-domain analysis was adopted to extract beta power. Then nonlinear interdependent measurement based on quantification of similarity index S was applied to the nonlinear dynamical phase-space brain model reconstructed from multi-channel EEG. Experimental and control group involved respectively eight experienced Chan meditation practitioners and eight healthy control subjects. For the experimental group, nonlinear interdependence was evaluated for the brain dynamics under three different stages, pre-meditation background (5-min), Chan meditation (30-min) and post-meditation relaxation (5-min). For the control group, nonlinear interdependence was evaluated for the brain dynamics under three different stages, pre-rest background (5-min), rest (30-min) and post-rest relaxation (5-min). Nonlinear interdependence interaction among various cortical regions was explored for five regions of local neural networks, including: Frontal, Parietal, Right temporal, Left temporal and Central regions. In this study, we find particular interaction between Frontal and Parietal region in all three stages.