Evaluation of hemodynamic responses to visual tasks using functional near infrared Spectroscopy

Abstract

Functional near-infrared spectroscopy (fNIRS) is becoming widely applied in many practical researches, especially in vivo researches on human. This study focuses on the hemodynamic responses of visual cortex when the human eye is excited by different conditions of flickering light stimulus. In our experiment, visual cortex is activated by flickering light at various spatial frequencies and modulation depths while the hemodynamic responses of the visual cortex are simultaneously monitored by fNIRS. Our experimental results suggest that flickering light can activate hemodynamic responses of the visual cortex but those changes are not significantly distinct among different stimulus conditions.