Summary
the 2014 International Symposium on Nonlinear Theory and its Applications
2014
Session Number:C3L-C
Session:
Number:C3L-C3
Detection of changes in connectivity based on joint recurrence plots
Masako Sugai, Masaharu Adachi,
pp.598-601
Publication Date:2014/9/14
Online ISSN:2188-5079
Summary:
Recently it is reported that the brain activation derives not only from the region solely but also among the network of the brain. In this study, we adopted recurrence plots and joint recurrence plots for NIRS (near infra-red spectroscopy) data to detect the difference in functional connectivity between motor execution and imagery. We examined the functional connectivity among the three regions in both right and left hemispheres, (1) pre-motor area and supplementary motor area (PM+SM), (2) primary motor area (M1) and (3) primary sensory area (S1). Furthermore, global recurrence plot was calculated to detect the changes in functional connectivity between rest and task. As a result, in motor execution, functional connectivity changes are detected significantly between left M1 and left S1, between left M1 and right PM+SM and between left S1 and right S1. In motor imagery task, more functional connectivity changes are found among six regions. Our study shows that joint recurrence plots could be a useful tool for detecting the functional connectivity and discriminating the difference between motor execution and imagery.