Vacillation, indecision and hesitation in moment-by-moment decoding of monkey motor cortex

Kaufman, M. T., Churchland, M. M., Ryu, S. I., Shenoy, K. V. (May 2015) Vacillation, indecision and hesitation in moment-by-moment decoding of monkey motor cortex. Elife, 4. e04677. ISSN 2050-084X (Electronic)2050-084X (Linking)

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URL: http://www.ncbi.nlm.nih.gov/pubmed/25942352
DOI: 10.7554/eLife.04677

Abstract

When choosing actions, we can act decisively, vacillate, or suffer momentary indecision. Studying how individual decisions unfold requires moment-by-moment readouts of brain state. Here we provide such a view from dorsal premotor and primary motor cortex. Two monkeys performed a novel decision task while we recorded from many neurons simultaneously. We found that a decoder trained using 'forced choices' (one target viable) was highly reliable when applied to 'free choices'. However, during free choices internal events formed three categories. Typically, neural activity was consistent with rapid, unwavering choices. Sometimes, though, we observed presumed 'changes of mind': the neural state initially reflected one choice before changing to reflect the final choice. Finally, we observed momentary 'indecision': delay forming any clear motor plan. Further, moments of neural indecision accompanied moments of behavioral indecision. Together, these results reveal the rich and diverse set of internal events long suspected to occur during free choice.

Item Type: Paper
Uncontrolled Keywords: decision making decoder free choice monkey motor neuroscience vacillation
Subjects: organism description > animal behavior
organism description > animal behavior > decision making
CSHL Authors:
Communities: CSHL labs > Churchland lab
Depositing User: Matt Covey
Date: 5 May 2015
Date Deposited: 22 Jun 2015 15:20
Last Modified: 03 Nov 2017 18:47
PMCID: PMC4415122
Related URLs:
URI: http://repository.cshl.edu/id/eprint/31587

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