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Cerebral blood volume in the sleep measured by near‐infrared spectroscopy
Author(s) -
SHIOTSUKA S.,
ATSUMI Y.,
OGATA S.,
YAMAMOTO R.,
IGAWA M.,
TAKAHASHI K.,
HIRASAWA H.,
KOYAMA K.,
MAKI A.,
YAMASHITA Y.,
KOIZUMI H.,
TORU M.
Publication year - 1998
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 - 10.1111/j.1440-1819.1998.tb01012.x
Subject(s) - sleep (system call) , wakefulness , psychology , polysomnography , sleep stages , hemoglobin , cerebral blood volume , slow wave sleep , hemodynamics , anesthesia , medicine , audiology , neuroscience , electroencephalography , computer science , operating system
We investigated the relationship between hemodynamic changes in the cortex measured by near‐infrared spectroscopy (NIRS) and the polysomnographic changes during sleep. Four healthy male volunteers participated in the study. Near‐infrared spectroscopy measuring and polysomnographic recordings were done simultaneously during sleep. In many case, oxy‐hemoglobin (oxy‐Hb) decreased and deoxy‐hemoglobin (deoxy‐Hb) increased during the transition from wakefulness to sleep, and oxy‐Hb increased toward deep sleep. Oxy‐Hb and deoxy‐Hb had larger fluctuations during REM sleep than those during non‐REM sleep. During REM sleep, oxy‐Hb often showed a lower level and deoxy‐Hb showed a higher level than those during the preceding and following non‐REM sleep.