New Mental Health Index based on Physiological Signals at Transition between Arousal and Sleeping State

The number of people who have mental health problems, such as depressive disorders, is increasing, but many patients do not take suitable medical treatment due to a lack of clear subjective symptoms. Mental disorders may manifest themselves in term of measurable physiological signals. Using a wearable sensor, we measured heat flux, skin temperature and GSR in healthy people and patients with depressive disorders for more than 50 days, and confirmed that an index to represent mental health condition can be established on differences in some of these sensory data.