A noninvasive measurement system for monitoring activity condition of a living body is provided, which can accurately monitor activity condition of a desired region of a living body. The means for measuring activity information is equipped with the light emitting source unit 3 to emit a light beam toward a living body, the light detecting unit 4 to receive the light beam scattered by blood present in the head 10, the temporary operation unit 1 A to compute temporary activity condition of blood in the head 10 by performing arithmetical operation of signals of the light beam to be received in the light detecting unit 4, the superficial activity operation unit to compute activity condition of blood in the scalp 14, and the correction operation unit 1 B to compute corrected activity condition of the brain 11 by correcting temporary activity condition of the head 10 that is computed in the temporary operation unit 1 A based on computed activity condition of blood in the scalp 14 in the superficial activity operation unit. Further, the means for measuring positional information is equipped with the positional information collecting unit to monitor positional information of the brain 11 in the head 10, and the memory unit 8 to memorize positional information of the brain 11 obtained in the positional information collecting unit.
Noninvasive measurement system for monitoring activity condition of living body