Biological information measurement system and recording medium

A non-transitory computer-readable recording medium on which an executable program is recorded, the program giving an instruction to a hardware processor of a biological information measurement system that includes a dewar covering a head of a subject and containing a plurality of sensors that are arranged for detecting biological signals and includes a single imaging device configured to acquire an image in which three or more reference points and the dewar are captured, the reference points being set in relation to the subject, the instruction causing the hardware processor to:

• measure brain neural activity of the subject based on the biological signals detected by the plurality of sensors;
• determine positional relationships between the reference points of the subject and the plurality of sensors based on the reference points and positional relationship data of the dewar;
• and
• re-determine the positional relationships between the reference points of the subject and the plurality of sensors, based on images that are acquired by the single imaging device at different times.