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Does concussion history and post-injury sleep quantity influence neurocognitive scores following concussion in collegiate athletes?
  1. NL Hoffman,
  2. ML Weber,
  3. JD Schmidt
  1. University of Georgia, Georgia, USA


Objective To determine if concussion history and post-concussion sleep quantity changes influence neurocognitive performance following concussion in collegiate athletes. It was hypothesised that athletes with a concussion history or shorter sleep duration following concussion would have poorer neurocognitive performance compared to athletes without a concussion history or greater sleep duration

Design Prospective cohort.

Setting Clinical Research Laboratory.

Participants Twenty-eight collegiate athletes (21 males and 7 females: age=20.2 ± 1.7 years, height=182.2 ± 11.9 cm, mass=90.3 ± 24.2 kg) without history of: headaches or migraines, substances/alcohol abuse, and/or psychiatric conditions.

Intervention Participants completed a preseason baseline and post-injury (PI) evaluation (1 day PI) using Immediate Post-Concussion Assessment and Cognitive Testing

Outcome measures Sleep change was calculated by subtracting post-injury sleep duration from baseline sleep duration. Athletes were categorised into either shorter sleep (<-1 hour change) or longer/same sleep (≥−1 hour change) groups. Independent samples t-tests were conducted to compare neurocognitive composite scores (verbal memory, visual memory, visual motor speed, reaction time, impulse control) between concussion history and sleep quantity change groups (α=0.05)

Main results Athletes with a concussion history had a faster reaction time (RT) (history:0.57±0.06 sec, no history:0.63±0.10 sec; p=0.048), but were more impulsive (history:8.55±5.87 errors, no history:4.18±3.89 errors; p=0.045) compared to those without a history of concussions. Neurocognitive performance did not differ between sleep quantity change groups.

Conclusions Athletes with a concussion history may be quicker to respond to neurocognitive tasks, but commit greater number of errors. Post-concussion sleep quantity changes do not influence neurocognitive performance one day post-injury. Future research should consider effects of concussion history on RT and impulse assessments.

Competing interests None.

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