label: Periodic limb movements of sleep
label_lc: periodic limb movements of sleep
description: Repetitive, stereotyped limb movements occurring during sleep, typically involving brief flexion of the toes, ankles, knees, or hips. These movements recur at regular intervals, often every 20-40 seconds, and may cause sleep fragmentation or daytime fatigue. PLMS commonly co-occurs with restless legs syndrome but may also occur independently.