Parkinsonian tremor loses its alternating aspect during non-REM sleep and is inhibited by REM sleep.

Askenasy, J J; Yahr, M D · J Neurol Neurosurg Psychiatry · 1990

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Abstract

Non-REM sleep transforms the waking alternating Parkinsonian tremor into subclinical repetitive muscle contractions whose amplitude and duration decrease as non-REM sleep progresses from stages I to IV. During REM sleep Parkinsonian tremor disappears while the isolated muscle events increase significantly.

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