Polysomnography shows repetitive, highly stereotyped limb movements that are:
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The PLMS index is ≥5/hour in pediatric cases and ≥15/hour in adult cases |
PLMS cause clinical sleep disturbance (difficulty with sleep initiation, sleep maintenance, and/or unrefreshing sleep) or impaired daytime function* |
The PLMS are not better explained by another current sleep disorder¶, medical or neurologic disorder, mental disorder, medication use, or substance use disorder (eg, exclude from PLMS counts the movements at the termination of cyclically occurring apneas) |
PLMD: periodic limb movement disorder; EMG: electromyogram; PLMS: periodic limb movements of sleep; RLS: restless legs syndrome.
* If PLMS are present without clinical sleep disturbance or impaired daytime function, the PLMS can be noted as a polysomnographic finding, but criteria are not met for a diagnosis of PLMD.
¶ A diagnosis of RLS supersedes a diagnosis of PLMD. Thus, a patient can have RLS with PLMS, but not RLS and PLMD.Do you want to add Medilib to your home screen?