David F. Parks, Aidan M. Schneider, Yifan Xu, Samuel J. Brunwasser, Samuel Funderburk, Danilo Thurber, Tim Blanche, Eva L. Dyer, David Haussler, Keith B. Hengen
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A nonoscillatory, millisecond-scale embedding of brain state provides insight into behavior
The most robust and reliable signatures of brain states are enriched in rhythms between 0.1 and 20 Hz. Here we address the possibility that the fundamental unit of brain state could be at the scale of milliseconds and micrometers. By analyzing high-resolution neural activity recorded in ten mouse brain regions over 24 h, we reveal that brain states are reliably identifiable (embedded) in fast, nonoscillatory activity. Sleep and wake states could be classified from 100 to 101 ms of neuronal activity sampled from 100 µm of brain tissue. In contrast to canonical rhythms, this embedding persists above 1,000 Hz. This high-frequency embedding is robust to substates, sharp-wave ripples and cortical on/off states. Individual regions intermittently switched states independently of the rest of the brain, and such brief state discontinuities coincided with brief behavioral discontinuities. Our results suggest that the fundamental unit of state in the brain is consistent with the spatial and temporal scale of neuronal computation. Parks, Schneider et al. show that brain states like sleep and wake can be reliably detected from milliseconds of neural activity in local regions in mice. Regions can briefly switch states independently, coinciding with fleeting behavioral changes.
期刊介绍:
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