Cognitive deficits associated with restless legs syndrome (RLS)

Virginia E. Pearson, Richard P. Allen, Terry Dean, Charlene E. Gamaldo, Suzanne R. Lesage, Christopher J. Earley

Research output: Contribution to journalArticlepeer-review

Abstract

Background and purpose: Restless legs syndrome produces significant chronic sleep loss, which despite not causing expected profound sleepiness, might nonetheless produce cognitive deficits similar to those seen with acute sleep deprivation, i.e. involving mostly pre-frontal cortical (PFC) functioning. Patients and methods: Sixteen patients off RLS treatment for at least 2 weeks and 15 age- and gender-matched control subjects had polysomnograms (PSGs) on two consecutive nights. Cognitive tests were given in the morning after the second night. Six cognitive tests were used: two Verbal Fluency tests and the Trail Making tests were selected to be particularly sensitive to PFC function and sleep loss. Porteus Mazes and the Stroop Test were selected to reflect more general frontal and executive function. The Colored Progressive Matrices were used to assess general cognitive skills. Results: RLS patients compared to controls showed significant (P<0.05) and sizeable (20-40%) deficits on two of the three PFC tests and marginally non-significant deficit (P<0.1) on the third. The other three tests showed no significant differences. Conclusions: There results indicate that RLS patients show cognitive deficits similar to that reported for one night of sleep loss.

Original languageEnglish (US)
Pages (from-to)25-30
Number of pages6
JournalSleep Medicine
Volume7
Issue number1
DOIs
StatePublished - Jan 2006

Keywords

  • Chronic sleep restriction
  • Cognition
  • Polysomnogram
  • Pre-frontal cortex
  • Restless legs syndrome
  • Sleep deprivation
  • Trail-making test
  • Verbal fluency test

ASJC Scopus subject areas

  • Medicine(all)

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