Sleep state determination apparatus, sleep state determination method, and sleep management system

A sleep state determination method comprising:

• measuring biological information;
• calculating a first index in accordance with an activity of a first autonomic nerve and a second index in accordance with an activity of a second autonomic nerve, based on the measured biological information;
• deriving first variation information which indicates a variation of the first index and a second variation information which indicates a variation of the second index;
• and
• determining whether a sleep state indicated by the biological information is REM sleep or non-REM sleep, based on the first variation information and the second variation information.

A sleep management system in which a sleep state determination apparatus that determines a sleep state and an information processing apparatus are communicably connected to each other,

• wherein the sleep state determination apparatus includes
• a measurement unit which measures biological information,
• a determination unit which calculates a first index in accordance with an activity of a first autonomic nerve and a second index in accordance with an activity of a second autonomic nerve, based on the biological information which is measured by the measurement unit, derives first variation information which indicates a variation of the first index and a second variation information which indicates a variation of the second index, and determines whether a sleep state indicated by the biological information is a REM sleep or a non-REM sleep, based on the first variation information and the second variation information, and
• a communication unit which notifies the information processing apparatus of a determination result of the determination unit through communication, and
• wherein the information processing apparatus processes information relating to sleep based on the determination result which is notified from the sleep state determination apparatus.