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It’s not you, it’s me: Corollary discharge in precerebellar nuclei of sleeping infant rats

Didhiti Mukherjee, Greta Sokoloff, View ORCID ProfileMark S. Blumberg
doi: https://doi.org/10.1101/329540
Didhiti Mukherjee
1Department of Psychological and Brain Sciences, University of Iowa, Iowa City, Iowa
5Delta Center, University of Iowa, Iowa City, Iowa
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Greta Sokoloff
1Department of Psychological and Brain Sciences, University of Iowa, Iowa City, Iowa
4Iowa Neuroscience Institute, University of Iowa, Iowa City, Iowa
5Delta Center, University of Iowa, Iowa City, Iowa
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Mark S. Blumberg
1Department of Psychological and Brain Sciences, University of Iowa, Iowa City, Iowa
2Interdisciplinary Graduate Program in Neuroscience, University of Iowa, Iowa City, Iowa
3Department of Biology, University of Iowa, Iowa City, Iowa
4Iowa Neuroscience Institute, University of Iowa, Iowa City, Iowa
5Delta Center, University of Iowa, Iowa City, Iowa
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Abstract

In week-old rats, somatosensory input arises predominantly from stimuli in the external environment or from sensory feedback associated with myoclonic twitches during active (REM) sleep. A previous study of neural activity in cerebellar cortex raised the possibility that the brainstem motor structures that produce twitches also send copies of motor commands (or corollary discharge, CD) to the cerebellum. Here, by recording from two precerebellar nuclei—the inferior olive and lateral reticular nucleus—we demonstrate that CD does indeed accompany the production of twitches. Within both structures, the CD signal comprises a surprisingly sharp activity peak within 10 ms of twitch onset. In the inferior olive, this sharp peak is attributable to the opening of slow potassium channels. We conclude that a diversity of neural activity is conveyed to the developing cerebellum preferentially during sleep-related twitching, enabling cerebellar processing of convergent input from CD and reafferent signals.

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The copyright holder for this preprint is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under a CC-BY 4.0 International license.
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Posted May 24, 2018.
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It’s not you, it’s me: Corollary discharge in precerebellar nuclei of sleeping infant rats
Didhiti Mukherjee, Greta Sokoloff, Mark S. Blumberg
bioRxiv 329540; doi: https://doi.org/10.1101/329540
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It’s not you, it’s me: Corollary discharge in precerebellar nuclei of sleeping infant rats
Didhiti Mukherjee, Greta Sokoloff, Mark S. Blumberg
bioRxiv 329540; doi: https://doi.org/10.1101/329540

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