Fig. 4From: Effectiveness of Tai Chi Yunshou motor imagery training for hemiplegic upper extremity motor function in poststroke patients: study protocol for a randomized clinical trialThe graph theoretical analysis process of fNIRS-brain networks. A Schematic illustration of the fNIRS channels layout. B fNIRS-Blood oxygen signals. C Construct a N × N correlation matrix. D Set threshold to construct a new correlation matrix. E Brain functional connectivityBack to article page