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Updated: Jul 31, 2026

Collecting Sleep, Circadian, Fatigue, and Performance Data in Complex Operational Environments
Published on: August 8, 2019
Excessive daytime sleepiness in adults with brain injuries
B E Masel1, R S Scheibel, T Kimbark
1Transitional Learning Center at Galveston, TX 77550, USA. bmasel@tlc-galveston.org
Objectives:
To determine the prevalence, demographics, and causes of excessive daytime sleepiness in adults with brain injuries after the acute phase of their injury and to investigate the relations between self-report and objective measures of hypersomnolence.
Design:
A case series of patients enrolled consecutively into a residential rehabilitation program.
Setting:
University sleep laboratory, live-in rehabilitation center.
Patients:
Adults with brain injuries (n = 71); mean time +/- standard deviation from injury to study, 38 +/- 60 months.
Interventions:
A polysomnogram and Multiple Sleep Latency Test (MSLT) were performed in each subject. Each subject also completed the Epworth Sleepiness Scale (ESS) and Pittsburgh Sleep Quality Index (PSQI) questionnaires.
Main Outcome Measures:
Sleep patterns, by polysomnogram. Daytime hypersomnolence, diagnosed by mean sleep latency on the MSLT
Results:
Mean sleep latency was
Conclusions:
Hypersomnia is common in adults with brain injuries, with a relatively high prevalence of sleep apnea-hypopnea syndrome, periodic limb movement disorder, and posttraumatic hypersomnia. Subjects with objectively measured sleepiness were not identified on self-reporting questionnaires, suggesting their inability to perceive their hypersomnolence.
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