The actigraph device is a type of watch used in the case of sleep disorders, to improve our understanding of our biological clock and to target improved sleep hygiene.

This device must be worn night and day for a week whilst maintaining a strict sleep diary. Thanks to activity, luminosity, and temperature sensors, it allows us to measure the motor activity and the alternation between rest and activity. These data are then analysed by software which will be able to translate them into sleep parameters such as sleep onset latency, duration of sleep, and the schedule of events.

It is a reliable and non-invasive measure well-adapted to children and adults, which facilitates better management of sleep disturbances.

Actigraphy does not replace a polysomnography, which is a complete medical examination for diagnosing sleep disorders (narcolepsy, sleep apnea, restless legs syndrome).