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1 Janelia Publications

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    Dudman LabJanelia Experimental TechnologyViral Tools
    10/05/23 | Conjoint specification of action by neocortex and striatum.
    Junchol Park , Peter Polidoro , Catia Fortunato , Jon Arnold , Brett Mensh , Juan A. Gallego , Joshua T. Dudman
    bioRxiv. 2023 Oct 05:. doi: 10.1101/2023.10.04.560957

    The interplay between two major forebrain structures - cortex and subcortical striatum - is critical for flexible, goal-directed action. Traditionally, it has been proposed that striatum is critical for selecting what type of action is initiated while the primary motor cortex is involved in the online control of movement execution. Recent data indicates that striatum may also be critical for specifying movement execution. These alternatives have been difficult to reconcile because when comparing very distinct actions, as in the vast majority of work to date, they make essentially indistinguishable predictions. Here, we develop quantitative models to reveal a somewhat paradoxical insight: only comparing neural activity during similar actions makes strongly distinguishing predictions. We thus developed a novel reach-to-pull task in which mice reliably selected between two similar, but distinct reach targets and pull forces. Simultaneous cortical and subcortical recordings were uniquely consistent with a model in which cortex and striatum jointly specify flexible parameters of action during movement execution.

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