Optical system for measuring metabolism in a body, method and program

A living body light measuring device, comprising:

• plural light-radiating means from which light is radiated to a head of a subject;
• plural light-receiving means for detecting light which is transmitted through the head of the subject after radiation from the light-radiating means;
• a calculator for calculating a change of concentration of oxidized hemoglobin and a change of concentration of deoxidized hemoglobin in the head of the subject at a measurement point comprising a pair of each of the plural light-radiating means and corresponding ones of the light-receiving means, wherein the measurement point includes a signal detected by the light-receiving means,
• a display for displaying the calculations obtained from the calculator,
• wherein the calculator decides whether the oxidized hemoglobin concentration change and the deoxidized hemoglobin concentration change are significant at each of the measurement points, and produces an activity index combined with the significance of the oxidized hemoglobin concentration change and the significance of the deoxidized hemoglobin concentration change, and
• the display displays the activity index at each of the measurement points.