Physiological hypnic myoclonus

P. Montagna, R. Liguori, M. Zucconi, E. Sforza, A. Lugaresi, F. Cirignotta, E. Lugaresi

Research output: Contribution to journalArticlepeer-review


Physiological hypnic myoclonus (PHM) was quantified during wakefulness and sleep in 7 normal subjects. PHM was evident during relaxed wakefulness and increased during stage 1 and especially REM sleep. In some muscles, however, (e.g., soleus) it showed no increase during sleep. PHM resembled simple fasciculation potentials, or, when repeated or in clusters, the fragmentary myoclonus in NREM sleep. Both 'hypnic' and 'myoclonus' are terms inappropriate to the description of this physiological spontaneous motor activity.

Original languageEnglish
Pages (from-to)172-176
Number of pages5
JournalElectroencephalography and Clinical Neurophysiology
Issue number2
Publication statusPublished - 1988


  • Fasciculation
  • Hypnic myoclonus
  • Polysomnography
  • Sleep

ASJC Scopus subject areas

  • Clinical Neurology
  • Neuroscience(all)


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