Activities of Oxy-Hb and DeOxy-Hb on motor imaging and motor execution by near-infrared spectroscopy

Abstract

The main segmentation of a Brain Computer Interface (BCI) is to record and understand motor activities of human brain. To implement this mission, there are several methods has been used like electroencephalography (EEG), electrocorticogram (ECoG), magneto encephalography (MEG), Near Infared spectroscopy (NIRS). In recent year, NIRS technology has been widely used because the ability to record localized brain activity with a spatial resolution in the order of centimeter. In this paper, we used a Near-Infrared Spectroscopy (NIRS) system to measure the oxy- and deoxy-hemoglobin changes at the motor cortex of two healthy volunteers during the left hand and right-hand motor imagery and motor execution. Therefore, we identify the difference of brain activities when the subject imagines two opposite actions (turn left and turn right) and the difference between left and right hemisphere during imaginary task. Then we also compare the differences between motor imaging and motor execution. © 2011 Springer-Verlag.