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Estimation of generator sources of human sleep spindles by dipole tracing method
Author(s) -
Ueda Kazutaka,
Nittono Hiroshi,
Hayashi Mitsuo,
Hori Tadao
Publication year - 2000
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.1440-1819.2000.00673.x
Subject(s) - sleep spindle , thalamus , dipole , sleep (system call) , neuroscience , arousal , orientation (vector space) , physics , psychology , electroencephalography , computer science , slow wave sleep , mathematics , geometry , quantum mechanics , operating system
Equivalent dipole sources of two types of human sleep spindles (14 and 12 Hz) were investigated on five normal subjects. The present study showed that a sleep spindle can be represented by a single equivalent dipole. For both 14 and 12 Hz sleep spindles, the equivalent dipole sources were estimated near the thalamus. The orientation of the equivalent dipole of a 14 Hz sleep spindle was in the centro‐parietal direction, while that of a 12 Hz sleep spindle was in the frontal direction. These results suggest that both types of sleep spindle activities are generated in the thalamus, and cortical de‐arousal plays a modificatory role on their different topographical distributions.