Layer 6 ensembles can selectively regulate the behavioral impact and layer-specific representation of sensory deviants. Voigts, J., Deister, C. A, & Moore, C. I eLife, 9:e48957, eLife Sciences Publications, Ltd, dec, 2020. ![Layer 6 ensembles can selectively regulate the behavioral impact and layer-specific representation of sensory deviants [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper doi abstract bibtex Predictive models can enhance the salience of unanticipated input. Here, we tested a key potential node in neocortical model formation in this process, layer (L) 6, using behavioral, electrophysiological and imaging methods in mouse primary somatosensory neocortex. We found that deviant stimuli enhanced tactile detection and were encoded in L2/3 neural tuning. To test the contribution of L6, we applied weak optogenetic drive that changed which L6 neurons were sensory responsive, without affecting overall firing rates in L6 or L2/3. This stimulation selectively suppressed behavioral sensitivity to deviant stimuli, without impacting baseline performance. This stimulation also eliminated deviance encoding in L2/3 but did not impair basic stimulus responses across layers. In contrast, stronger L6 drive inhibited firing and suppressed overall sensory function. These findings indicate that, despite their sparse activity, specific ensembles of stimulus-driven L6 neurons are required to form neocortical predictions, and to realize their behavioral benefit.
@article {10.7554/eLife.48957,
article_type = {journal},
title = {Layer 6 ensembles can selectively regulate the behavioral impact and layer-specific representation of sensory deviants},
author = {Voigts, Jakob and Deister, Christopher A and Moore, Christopher I},
editor = {Colgin, Laura L and Huguenard, John R and Stanley, Garrett B and Paz, Jeanne T},
volume = 9,
year = 2020,
month = {dec},
pub_date = {2020-12-02},
pages = {e48957},
citation = {eLife 2020;9:e48957},
doi = {10.7554/eLife.48957},
url = {https://doi.org/10.7554/eLife.48957},
abstract = {Predictive models can enhance the salience of unanticipated input. Here, we tested a key potential node in neocortical model formation in this process, layer (L) 6, using behavioral, electrophysiological and imaging methods in mouse primary somatosensory neocortex. We found that deviant stimuli enhanced tactile detection and were encoded in L2/3 neural tuning. To test the contribution of L6, we applied weak optogenetic drive that changed which L6 neurons were sensory responsive, without affecting overall firing rates in L6 or L2/3. This stimulation selectively suppressed behavioral sensitivity to deviant stimuli, without impacting baseline performance. This stimulation also eliminated deviance encoding in L2/3 but did not impair basic stimulus responses across layers. In contrast, stronger L6 drive inhibited firing and suppressed overall sensory function. These findings indicate that, despite their sparse activity, specific ensembles of stimulus-driven L6 neurons are required to form neocortical predictions, and to realize their behavioral benefit.},
keywords = {cortex, oddball, deviant, vibrissa, prediction, layer 6},
journal = {eLife},
issn = {2050-084X},
publisher = {eLife Sciences Publications, Ltd}
}
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