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Granule cells reorient cortical trajectories to separate contexts

Research Computational Neuroscience

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TL;DR - Simultaneous imaging in mice learning two skills showed that premotor-cortex activity trajectories generalize across contexts, whereas cerebellar granule-cell trajectories coherently reorient to distinguish them. The findings suggest a neural mechanism that balances shared skill representations with context separation.

  • Researchers simultaneously imaged premotor cortex and cerebellar granule cells during parallel skill learning.
  • Cortical trajectories generalized between the two learned contexts.
  • Granule-cell trajectories reoriented away from one another, producing context-specific separation.
  • This complementary coding may enable generalization without conflating distinct contexts.

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Granule cells reorient cortical trajectories to separate contexts

Nature Martha G. Garcia-Garcia, Michał J. Wójcik, Srijan Thota, Luke Drake, Amma Otchere, Oluwatobi Akinwale, Lizmaylin Ramos, Rui Ponte Costa, Mark J. Wagner 2026-08-26 doi:10.1038/s41586-026-10946-1
Public signals OpenAlex citations 1
Providers: Hugging Face · N/A OpenAlex · Citations 1 Publisher · N/A Semantic Scholar · N/A X · N/A Fetched 2026-09-25 14:27:24.068742 UTC

TL;DR - Simultaneous imaging in mice learning two skills showed that premotor-cortex activity trajectories generalize across contexts, whereas cerebellar granule-cell trajectories coherently reorient to distinguish them. The findings suggest a neural mechanism that balances shared skill representations with context separation.

  • Researchers simultaneously imaged premotor cortex and cerebellar granule cells during parallel skill learning.
  • Cortical trajectories generalized between the two learned contexts.
  • Granule-cell trajectories reoriented away from one another, producing context-specific separation.
  • This complementary coding may enable generalization without conflating distinct contexts.
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