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Parkinsonian tremor loses its alternating aspect during non-REM sleep and is inhibited by REM sleep.
  1. J J Askenasy,
  2. M D Yahr
  1. Department of Neurology, Sackler School of Medicine, Tel-Aviv University, Israel.

    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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