actigraphy
Pronunciation: ak-TIG-rah-fee
Objective monitoring method using wrist-worn devices to track movement patterns and estimate sleep-wake cycles over extended periods.
Full Definition
Actigraphy involves the use of small, wrist-worn devices that contain accelerometers to continuously monitor movement patterns, providing objective estimates of sleep-wake cycles over days to weeks. The devices record activity levels and use validated algorithms to infer periods of sleep and wakefulness based on movement patterns. Actigraphy is particularly useful for assessing circadian rhythm disorders, evaluating treatment responses, documenting sleep patterns in natural environments, and providing objective sleep data when polysomnography is not feasible. While less detailed than polysomnography, actigraphy offers the advantage of long-term monitoring in the patient's home environment.
Usage
Usage note: Distinguish from polysomnography, which provides more detailed physiological monitoring but over shorter periods.
In Context
- "Two weeks of actigraphy revealed an irregular sleep-wake pattern consistent with shift work disorder." — Circadian rhythm assessment
- "Actigraphy data showed improved sleep consolidation following melatonin treatment." — Treatment monitoring report