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Choice suppression is achieved through opponent but not independent function of the striatal indirect pathway in mice

Kristen Delevich, Benjamin Hoshal, Anne GE Collins, Linda Wilbrecht
doi: https://doi.org/10.1101/675850
Kristen Delevich
1Department of Psychology, University of California, Berkeley, Berkeley, CA 94720, USA
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Benjamin Hoshal
3Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley CA 94720 USA
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Anne GE Collins
1Department of Psychology, University of California, Berkeley, Berkeley, CA 94720, USA
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Linda Wilbrecht
1Department of Psychology, University of California, Berkeley, Berkeley, CA 94720, USA
2Helen Wills Neuroscience Institute, University of California, Berkeley, Berkeley, CA 94720 USA
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  • For correspondence: wilbrecht@berkeley.edu
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Abstract

The dorsomedial striatum (DMS) plays a key role in action selection, but little is known about how direct and indirect pathway spiny projection neurons (dSPNs and iSPNs) contribute to choice suppression in freely moving animals. Here, we used pathway-specific chemogenetic manipulation during a serial choice foraging task to test opposing predictions for iSPN function generated by two theories: 1) the ‘select/suppress’ heuristic which suggests iSPN activity is required to suppress alternate choices and 2) the network-inspired Opponent Actor Learning model (OpAL) which proposes that the weighted difference of dSPN and iSPN activity determines choice. We found that chemogenetic activation, but not inhibition, of iSPNs disrupted learned suppression of nonrewarded choices, consistent with the predictions of the OpAL model. Our findings suggest that iSPNs’ role in stopping and freezing does not extend in a simple fashion to choice suppression. These data may provide insights critical for the successful design of interventions for addiction or other conditions in which suppression of behavior is desirable.

Competing Interest Statement

The authors have declared no competing interest.

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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-NC-ND 4.0 International license.
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Posted June 06, 2020.
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Choice suppression is achieved through opponent but not independent function of the striatal indirect pathway in mice
Kristen Delevich, Benjamin Hoshal, Anne GE Collins, Linda Wilbrecht
bioRxiv 675850; doi: https://doi.org/10.1101/675850
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Choice suppression is achieved through opponent but not independent function of the striatal indirect pathway in mice
Kristen Delevich, Benjamin Hoshal, Anne GE Collins, Linda Wilbrecht
bioRxiv 675850; doi: https://doi.org/10.1101/675850

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