Evidence of cognitive activity in functional near infrared spectroscopy signal

Abstract: We show that functional near infrared spectroscopy signals can monitor task-related cerebral hemodynamic response. We detect periodicities in the near infared spectroscopy signals and show that the estimated periods are consistent across multiple detectors and subjects, despite the jittered periodicity of the stimuli sequence that is used in a target categorization experiment. ©2003 American Society of America OCIS codes: (170.3880 Medical and biological imaging; (170.5280) Photon migratio