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X-WR-CALNAME:Biomedical Mathematics Group
X-ORIGINAL-URL:https://www.ibs.re.kr/bimag
X-WR-CALDESC:Events for Biomedical Mathematics Group
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TZID:Asia/Seoul
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TZOFFSETFROM:+0900
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DTSTART:20250101T000000
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BEGIN:VEVENT
DTSTART;TZID=Asia/Seoul:20260724T100000
DTEND;TZID=Asia/Seoul:20260724T120000
DTSTAMP:20260629T081120Z
CREATED:20260629T081120Z
LAST-MODIFIED:20260629T081120Z
UID:12661-1784887200-1784894400@www.ibs.re.kr
SUMMARY:Oscillatory network efficiency predicts mood and fatigue during sleep deprivation - Seunghun Lee
DESCRIPTION:In this talk\, we discuss the paper “Oscillatory network efficiency predicts mood and fatigue during sleep deprivation” by David Negelspach et al.\, communications biology\, 2026. \nAbstract: \nFluctuations in performance and mood across the day have been traced to circadian and homeostatic modulation of motor and affective systems\, although their combined influence on network topology is rarely considered. We applied a data-driven curve-fitting algorithm to capture both circadian and infradian rhythms ( ≥ 24 hours) in frontolimbic and sensorimotor regions using functional magnetic resonance imaging (fMRI) measures of connectivity. Across the course of sleep deprivation\, functional network structure was not static but changed in tandem with objective and subjective behavioral measures. Oscillatory patterns in network efficiency suggest that circadian rhythmicity extends to higher-order network topology. Sleep deprivation affects functional networks in a region-specific manner\, highlighting local vulnerability. Distinct cortical regions exhibited unique circadian phases of network reorganization\, revealing that connectivity rhythms are spatially as well as temporally differentiated across the brain. Time-dependent alterations in connectome topology offer a systems-level framework for understanding how internal timekeeping and sleep pressure modulate non-linear trends in psychomotor vigilance\, mood\, and fatigue across extended wakefulness.
URL:https://www.ibs.re.kr/bimag/event/oscillatory-network-efficiency-predicts-mood-and-fatigue-during-sleep-deprivation-seunghun-lee/
LOCATION:B232 Seminar Room\, IBS\, 55 Expo-ro Yuseong-gu\, Daejeon\, Daejeon\, 34126\, Korea\, Republic of
CATEGORIES:Journal Club
ORGANIZER;CN="Jae Kyoung Kim":MAILTO:jaekkim@kaist.ac.kr
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