Periodic limb movement is where a limb will move uncontrollably multiple times. It does not keep a patient from falling asleep, but will awaken the patient whilst asleep. This causes fatigue, lack of concentration, and irritability.
These events occur twice at night, periodic limb movement in sleep (PLMS) and periodic limb movement during wakefulness (PLMW).
Just like RLS, PLMD is treatable
