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Decreased blood flow of the left thalamus during somnolent episodes in a case of recurrent hypersomnia
Author(s) -
NOSE IWAO,
OOKAWA TOSHIHIDE,
TANAKA JUNJI,
YAMAMOTO TAKASHI,
UCHIMURA NAOHISA,
MAEDA HISAO,
KUWAHARA HIROO
Publication year - 2002
Publication title -
psychiatry and clinical neurosciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.609
H-Index - 74
eISSN - 1440-1819
pISSN - 1323-1316
DOI - 10.1046/j.1440-1819.2002.00979.x
Subject(s) - hyperventilation , thalamus , electroencephalography , single photon emission computed tomography , cerebral blood flow , anesthesia , blood flow , medicine , psychology , audiology , cardiology , neuroscience
A 24‐year‐old male with recurrent hypersomnia associated with decreased blood flow in the thalamus on single photon emission computed tomography (SPECT) is reported. In the hypersomnolent period, the decrease of blood flow in the left thalamus was revealed in the SPECT and slow waves appeared sporadically or sometimes as a burst on the electroencephalogram (EEG). In a phase of insomnia in the convalescent period there were almost no slow waves in the resting EEG but many slow waves appeared on hyperventilation EEG and the power spectrum at this hyperventilation resembled the power spectrum at the resting EEG in the hypersomnolent period. In the remission period there was no abnormal data in these testings.