Characterization of Topographically Specific Sleep Spindles in Mice

Title
Characterization of Topographically Specific Sleep Spindles in Mice
Authors
김동욱황은진이민아성호근최지현
Keywords
sleep spindles; high-density EEG; thalamic LFP; thalamocortical networks; topography; sleep slow waves; mouse
Issue Date
2015-01
Publisher
Sleep
Citation
VOL 38, NO 1, 1-12
Abstract
Study Objective: Sleep spindles in humans have been classified as slow anterior and fast posterior spindles; recent findings indicate that their profiles differ according to pharmacology, pathology, and function. However, little is known about the generation mechanisms within the thalamocortical system for different types of spindles. In this study, we aim to investigate the electrophysiological behaviors of the topographically distinctive spindles within the thalamocortical system by applying high-density EEG and simultaneous thalamic LFP recordings in mice. Design: 32-channel extracranial EEG and 2-channel thalamic LFP were recorded simultaneously in freely behaving mice to acquire spindles during spontaneous sleep. Subjects: Hybrid F1 male mice of C57BL/6J and 129S4/svJae Measurements and Results: Spindle events in each channel were detected by spindle detection algorithm, and then a cluster analysis was applied to classify the topographically distinctive spindles. All sleep spindles were successfully classified into 3 groups: anterior, posterior, and global spindles. Each spindle type showed distinct thalamocortical activity patterns regarding the extent of similarity, phase synchrony, and time lags between cortical and thalamic areas during spindle oscillation. We also found that sleep slow waves were likely to associate with all types of sleep spindles, but also that the ongoing cortical decruitment/recruitment dynamics before the onset of spindles and their relationship with spindle generation were also variable, depending on the spindle types. Conclusion: Topographically specific sleep spindles show distinctive thalamocortical network behaviors.
URI
http://pubs.kist.re.kr/handle/201004/48706
ISSN
01618105
Appears in Collections:
KIST Publication > Article
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