What is actigraphy and how is it used?

Actigraphy is a non-invasive technique used to monitor sleep patterns and circadian rhythms through the use of a wrist-worn device, similar to a wristwatch. This device, typically equipped with an accelerometer, tracks movement over time, which can be correlated with sleep and wakefulness. By analyzing periods of inactivity, the data collected can provide insights into sleep duration, quality, and sleep fragmentation.

The utilization of actigraphy is especially valuable for individuals who may have difficulty participating in traditional sleep studies, as it allows for the collection of data in a naturalistic setting over extended periods—often days or weeks. This aids in diagnosing various sleep disorders and assessing sleep-related behaviors in real-world conditions, making it a preferred method in many clinical and research contexts.