A Case of Transient Hypersomnia with Increased Slow Wave Sleep after Unilateral Paramedian Thalamic Infarction

Received June 7, 2011 Revised June 10, 2011 Accepted June 20, 2011 Address for correspondence Jee Hyun Kim, MD, PhD Department of Neurology, Dankook University College of Medicine, 359 Manghyang-ro, Dongnam-gu, Cheonan 330-715, Korea Tel: +82-41-550-3292 Fax: +82-41-550-6245 E-mail: fever26@paran.com Paramedian thalamic stroke is known to be associated with hypersomnia, usually with bilateral lesions. We report a case of one patient who developed transient hypersomnia after unilateral paramedian thalamic infarction. A 79-year-old female patient with right paramedian thalamic infarction presented with left hemiparesis and hypersomnia. A night polysomnogram, 10 days after symptom onset, showed increased slow wave sleep and the presence of slow wave sleep throughout the entire night. Hypersomnia improved 7 weeks after the onset of symptom. J Korean Sleep Res Soc 2011;8:20-23