title: Sleep following sport-related concussions.
abstract: OBJECTIVE
  Sleep and vigilance disorders are among the most commonly reported symptoms following a concussion. The aim of the study was thus to investigate the effects of sport-related concussions on subjective and objective sleep quality.
  
  
  METHODS
  Ten concussed athletes and 11 non-concussed athletes were included. Concussed athletes had a history of 4.6+/-2.1 concussions with at least one concussion during the last year. They were recorded for two consecutive nights in the laboratory and during a 10-min period of wakefulness. They completed questionnaires related to sleep quality and symptoms as well as neuropsychological tests and the CogSport computer battery.
  
  
  RESULTS
  Concussed athletes reported more symptoms and worse sleep quality than control athletes, but no between-group differences were found on polysomnographic variables or on REM and NREM sleep quantitative EEG variables. However, concussed athletes showed significantly more delta activity and less alpha activity during wakefulness than did control athletes.
  
  
  CONCLUSIONS
  In spite of the subjective complaints in sleep quality of concussed athletes, no change was observed in objective sleep characteristics. However, concussions were associated with an increase in delta and a reduction in alpha power in the waking EEG. Sport-related concussions are thus associated with wakefulness problems rather than sleep disturbances.
authors.affiliation: Research Center on Sleep and Biological Rhythms, Sacre-Coeur Hospital, 5400 boul. Gouin Ouest, Montreal, Que., Canada.
authors.forename: Nadia
authors.initials: N
authors.lastname: Gosselin
authors.forename: Maryse
authors.initials: M
authors.lastname: Lassonde
authors.forename: Dominique
authors.initials: D
authors.lastname: Petit
authors.forename: Suzanne
authors.initials: S
authors.lastname: Leclerc
authors.forename: Valérie
authors.initials: V
authors.lastname: Mongrain
authors.forename: Alex
authors.initials: A
authors.lastname: Collie
authors.forename: Jacques
authors.initials: J
authors.lastname: Montplaisir
mesh_terms: D000328:Adult; D000513:Alpha Rhythm; D001265:Athletic Injuries / Q000150:complications* / Q000503:physiopathology; D001924:Brain Concussion / Q000150:complications* / Q000503:physiopathology; D001930:Brain Injuries / Q000150:complications* / Q000503:physiopathology; D003071:Cognition; D003700:Delta Rhythm; D005260:Female; D006801:Humans; D008297:Male; D009483:Neuropsychological Tests; D017286:Polysomnography; D012893:Sleep Wake Disorders / Q000175:diagnosis / Q000209:etiology* / Q000503:physiopathology; D012895:Sleep, REM; D011795:Surveys and Questionnaires; D055815:Young Adult