Diffusion Tensor Imaging Tractography and MRI Perfusion in Post Traumatic Brain Injury Hypersomnia

Three years ago, a 48-year-old female patient had head trauma with commotion followed by a four-month coma. After hospital discharge, she complained of bilateral frontal headache, amnesia related to the episode and excessive daytime sleepiness with prolonged non-restorative naps any time of day. Previous patient history did not report neurological or psychiatric illness. At our first outpatient sleep service (besides a normal neurological exam), she did report severe sleep disturbances, particularly an incoercible daytime sleepiness followed by non-refreshing and prolonged naps (Epworth Scale 18), prolonged night-time sleep with snoring and an important morning sleep inertia.

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