入眠期の脳波段階とポリソムノグラム

Hypnagogic EEG stages and polysomnogram

HAYASHI Mitsuo

HIBINO Kenji

HORI Tadao

広島大学総合科学部紀要. IV, 理系編

Memoirs of the Faculty of Integrated Arts and Sciences, Hiroshima University. IV, Science reports

The aim of this study is to show the polysomnogram of hypnagogic period. Sixteen subjects slept for two nights. Their EEGs (Fz, Cz, Pz, Oz), horizontal and vertical EOGs, submentalis EMG, thoracic and abdominal respiration were recorded. They pressed a button when pip tones (1000Hz, 50dB, max duration : 5s, ISI : 30-90s) were presented, and reported their psychological experiences, According to Hori et al. (1994), the hypnagogic EEGs just 5s before the pip tones were classified into 9 stages, as follows; 1) alpha wave train, 2) alpha wave intermittnet (%α>50), 3) alpha wave intermittent (%α<50), 4) EEG flattening, 5) ripples, 6) vertex sharp wave solitary, 7) vertex sharp wave bursts, 8) vertex sharp wave and incomplete spindles, 9) spindles. The polysomnograms of these 9 EEG stages were presented. Physiological, behavioral and subjective changes were observed as a function of hypnagogic EEG stages.

入眠期

ポリソムノグラム

脳波段階

入眠時心像

Medical sciences [ 490 ]

jpn

広島大学総合科学部

[Created] 2006-03-21

[ISSN] 1340-8364

[NCID] AN10435936