A midbrain-thalamus-cortex circuit reorganizes cortical dynamics to initiate movement

Cell 2022 189 cites
2022:152023:302024:432025:502026:51
2022 2026
189

H. Inagaki, Susu Chen, Margreet C. Ridder, Pankaj Sah, Nuo Li, Zidan Yang et al.

Abstract

Motor behaviors are often planned long before execution but only released after specific sensory events. Planning and execution are each associated with distinct patterns of motor cortex activity. Key questions are how these dynamic activity patterns are generated and how they relate to behavior. Here, we investigate the multi-regional neural circuits that link an auditory “Go cue” and the transition from planning to execution of directional licking. Ascending glutamatergic neurons in the midbrain reticular and pedunculopontine nuclei show short latency and phasic changes in spike rate that are selective for the Go cue. This signal is transmitted via the thalamus to the motor cortex, where it triggers a rapid reorganization of motor cortex state from planning-related activity to a motor command, which in turn drives appropriate movement. Our studies show how midbrain can control cortical dynamics via the thalamus for rapid and precise motor behavior.

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