title: Estimation of generator sources of human sleep spindles by dipole tracing method.
abstract: 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.
authors.affiliation: Department of Behavioral Sciences, Faculty of Integrated Arts and Sciences, Hiroshima University, Japan. kaueda@hiroshima-u.ac.jp
authors.forename: K
authors.initials: K
authors.lastname: Ueda
authors.forename: H
authors.initials: H
authors.lastname: Nittono
authors.forename: M
authors.initials: M
authors.lastname: Hayashi
authors.forename: T
authors.initials: T
authors.lastname: Hori
mesh_terms: D000328:Adult; D001931:Brain Mapping; D002540:Cerebral Cortex / Q000502:physiology*; D004292:Dominance, Cerebral / Q000502:physiology; D004569:Electroencephalography; D006801:Humans; D008297:Male; D009434:Neural Pathways / Q000502:physiology; D017286:Polysomnography; D012016:Reference Values; D012894:Sleep Stages / Q000502:physiology*; D013788:Thalamus / Q000502:physiology*