National Sleep Foundation

Chapter 7: Sleep-Related Movement Disorders

Sleep-Related Movement Disorders (SRMD)

Sleep-related movement disorders are diagnosed when an individual experiences distress, insomnia, excessive daytime fatigue, or non-restorative sleep stemming from movements that occur either during sleep or near sleep onset.

Sleep-disorder movement disorders result in typically simple and stereotyped (e.g., short limb twitches) or other monophasic movement disorders (e.g., sleep-related leg cramps). The simplicity of movement associated with these disorders differs from that seen in other sleep disorders. The type of movement seen in sleep walking, for example, is complex.

This chapter describes the following sleep-related movement disorders:

  • Periodic Limb Movement Disorder (PLMD)
  • Restless Legs Syndrome (RLS)
  • Sleep-Related Leg Cramps
  • Sleep-Related Bruxism (SB)
  • Sleep-Related Rhythmic Movement Disorder (RMD)
  • Benign Sleep Myoclonus of Infancy