DEVICE WHICH COMPRISES A PHYSICAL ACTIVITY AND POSITION SENSOR, A PERIPHERAL TEMPERATURE SENSOR AND A LIGHT SENSOR FOR PROVIDING INFORMATION RELATING TO THE STATE OF THE CIRCADIAN SYSTEM

摘要

The invention is a device which comprises a physical activity and position sensor, a peripheral temperature sensor and a light sensor, provides information relating to the state of the circadian system and relating to the sleep/wake state of a person and can be placed on the wrist of a person. The device may also include a blood pressure sensor. This device may be applied to the study of the human circadian system in general and to the study of the sleep/wake rhythms and blood pressure in particular.