Sleep disruption in spinocerebellar ataxia type 3: A genetic and polysomnographic study

Nai Fang Chi, Guang Ming Shiao, Hsiao Lun Ku, Bing Wen Soong

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)


Background: Sleep structure disruption and rapid eye movement (REM) sleep behavior disorders (RBD) have been previously reported in patients with neurodegenerative diseases. However, similar studies have rarely been quantitatively conducted in type 3 spinocerebellar ataxia (SCA3). Methods: Fifteen patients with SCA3 and 16 healthy controls were recruited and evaluated by clinical history, International Cooperative Ataxia Rating Scale (ICARS), Epworth sleepiness scale (ESS), and polysomnography. Results: Patients with SCA3 had reductions in sleep efficiency and percentage of REM sleep, which were negatively correlated with the severity of ataxia as evaluated by ICARS. REM sleep reduction occurred regardless of the presence of RBD, and severe reduction of REM sleep may significantly disturb the assessment of RBD. Conclusion: Poor sleep efficiency and REM sleep aberrations are the characteristics of sleep structure disruption in SCA3 as the disease progresses. The incidence of respiratory disturbance during sleep or excessive daytime sleepiness was not significantly higher in SCA3 patients than controls.

Original languageEnglish
Pages (from-to)25-30
Number of pages6
JournalJournal of the Chinese Medical Association
Issue number1
Publication statusPublished - Jan 2013
Externally publishedYes


  • Polysomnography
  • REM sleep behavior disorder
  • Spinocerebellar ataxia

ASJC Scopus subject areas

  • General Medicine


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