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Hemifacial spasm in sleep - A polysomnographic study.

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Facial spasms in hemifacial spasm (HFS) patients continue during sleep, though reduced. This sleep disruption highlights the need to assess sleep quality in HFS patients.

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Area of Science:

  • Neurology
  • Sleep Medicine
  • Movement Disorders

Background:

  • Limited polysomnography (PSG) data exists for facial dyskinesias.
  • Previous studies on hemifacial spasm (HFS) sleep continuity were inconclusive.

Purpose of the Study:

  • To investigate the presence and characteristics of abnormal facial movements during sleep in HFS patients.
  • To quantify the impact of HFS on sleep architecture and arousals.

Main Methods:

  • Utilized polysomnography (PSG) with electromyography (EMG) to record facial spasms.
  • Quantified spasm duration and compared activity between wakefulness and sleep stages.
  • Assessed the number of arousals and their relation to EMG activity.

Main Results:

  • Facial spasms persisted during sleep in all 12 HFS patients studied.
  • Spasm activity significantly decreased during sleep compared to wakefulness (p < 0.001).
  • Sleep was interrupted by arousals, with no significant difference in EMG activity between non-REM and REM sleep.

Conclusions:

  • Confirms that hyperkinetic movements in HFS continue during sleep, albeit reduced.
  • Sleep disruptions and increased arousals are associated with HFS during sleep.
  • Emphasizes the clinical importance of evaluating sleep quality in HFS management.