Related Experiment Video
Updated: Feb 22, 2026
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Evaluation of Hemisphere Lateralization with Bilateral Local Field Potential Recording in Secondary Motor Cortex of Mice
Published on: July 31, 2019
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The Interplay between Long- and Short-Range Temporal Correlations Shapes Cortex Dynamics across Vigilance States
Christian Meisel1,2, Andreas Klaus3, Vladyslav V Vyazovskiy4
1Section on Critical Brain Dynamics, National Institute of Mental Health, Bethesda, Maryland 20892, christian@meisel.de.
Summary
Cortical timescales, crucial for brain function, change with sleep and wakefulness. Non-REM sleep disrupts these long timescales, impacting cognitive abilities, while sleep restores them.
Area of Science:
- Neuroscience
- Systems Neuroscience
- Computational Neuroscience
Background:
- Cortical dynamics during wakefulness show long-range temporal correlations, aiding signal integration for cognitive tasks.
- Sleep is hypothesized to involve a breakdown of these long-range correlations, but direct neuronal timescale measurements are lacking.
Purpose of the Study:
- To investigate how cortical timescales change with vigilance states (wake, sleep) and time awake.
- To identify the mechanisms disrupting long timescales and their functional implications for information processing.
Main Methods:
- Measured individual neuronal timescales in freely behaving male rats.
- Analyzed changes in timescales across different vigilance states and during sleep deprivation.
- Employed computational modeling to understand timescale disruption mechanisms.
Main Results:
- Cortical timescales vary with vigilance state and time awake.
- Quiet wake and REM sleep exhibit long timescales, while non-REM sleep abrogates them.
- Wakefulness shows rapid transitions to short-timescale, sleep-like states, exacerbated by sleep deprivation.
- Neuronal offline periods were identified as a key mechanism disrupting long timescales.
Conclusions:
- Cortical timescales are dynamically regulated by vigilance states, with non-REM sleep characterized by short timescales.
- Sleep deprivation disrupts long timescales, which are restored after sleep.
- Sleep reorganizes cortical networks towards long timescales, essential for efficient information integration during wakefulness.
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