What is PLMD?
Periodic Limb Movement Disorder (PLMD) is a condition in which an individual’s arms or legs move during sleep. Formally referred to as nocturnal myoclonus, PLMD is not the same as the normally occurring night muscle spasms that exist when falling asleep. In this condition, limb movement takes place in 20 to 30 second intervals, five or more times per hour. These movements happen consistently throughout the night during non-REM sleep periods.
