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Sleep Rhythms

Thalamus · Brainstem

Sleep stages across one nightWakeN1N2N3REM One spindle (12–15 Hz) Illustrative — not real data
Illustrative — the lab’s own figure goes here.

The question

Sleep is not an off state but a change of rhythm. The thalamus generates 12–15 Hz spindles that keep cortex and hippocampus in step, and the brainstem flips the switch into REM sleep. We record where these rhythms start, how they spread, and what weakens with age.

ThalamusBrainstem

Methods, equipment and data

Methods, equipment and data for Sleep Rhythms
RecordingThalamic and brainstem multichannel recording, cortical EEG
Sleep scoringAutomated scoring with human review
ManipulationOptogenetic stimulation of the thalamic reticular nucleus
AnalysisSpindle detection, spindle–ripple coupling metrics
Open toolSleep-stage scoring tool [code repository link]

Key papers

All papers on Thalamus
  1. 25
    “Sharp-wave ripples gate overnight replay of newly learned routes”

    J. Kim+, T. Moon+, S. Yoon, S. Han*

    Journal of Circuit Neuroscience, 18(4), 211–229, 2026.

    Int’l journalHippocampusThalamusLINK full textPDF file
  2. 22
    “A lightweight convolutional model for automated sleep-spindle detection”

    H. Jung, T. Moon, S. Han*

    Journal of the Korean Society for Neural Circuits, 12(2), 45–58, 2026. (in Korean)

    Domestic journalThalamusLINK full textPDF file
  3. 19
    “Brainstem bursts precede the switch from spindle-rich sleep to REM”

    T. Moon, N. Bae, S. Han*

    Annual Meeting on Systems Neuroscience (AMSN 2025), Poster 3-118, 2025.

    Int’l conferenceThalamusBrainstemPDF file

People

  • Seoyun HanPI
  • Taeo MoonThalamocortical spindle synchrony
  • Haram JungAutomated spindle detection
  • Naeun BaeBrainstem REM-switch circuits
  • Soyul LimSleep-stage scoring tool

Other topics