Periodic limb movements
Overview:
Periodic limb movements (PLM) are occurrences of simple, repetitive, and uncontrollable muscle movements. They do not typically interfere with falling asleep, but seriously disrupt sleep during the night, which causes daytime fatigue. Movements do not involve a change in body position, stretching a muscle, or a cramp, but tend to involve muscle tightening or flexing in the lower legs. PLM can occur during the day, however it is much more common during the night.
Symptoms:
Normally, those affected by PLM are unaware of the movements. Someone who sleeps in the same bed is more likely to notice symptoms which include:
- Unusual, repetitive movements, typically in the lower legs
- Fatigue
Tests and diagnosis:
In order to diagnose PLM, a doctor may recommend a polysomnogram (sleep study).
Treating periodic limb movements:
While PLM cannot be cured, it can be managed. In some cases, doctors will prescribe medications that help control the movements. Those with mild cases may benefit from sedatives or pain killers.