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RLS

RLS and Periodic Limb Movement Disorder

More than 80 percent of people with RLS also experience a more common condition known as periodic limb movement disorder (PLMD). PLMD is also called periodic limb movement in sleep (PLMS).
 
Periodic limb movement disorder is characterized by involuntary leg twitching or jerking movements during sleep that typically occur every 10 to 60 seconds, sometimes throughout the night. The symptoms cause repeated awakening and severely disrupted sleep. Unlike RLS, the movements caused by PLMD are involuntary and people have no control over them. Although many people with RLS also develop PLMD, most people with PLMD do not experience RLS. The cause of PLMD is unknown.

(Click Periodic Limb Movement Disorder for more information.)
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