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Network dynamics underlying activity-timescale differences between cortical regions.

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This summary is machine-generated.

Different brain regions sustain neural activity over distinct timescales, influencing network dynamics and computation. This study reveals how cortical wiring dictates these time-dependent network responses.

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Area of Science:

  • Neuroscience
  • Computational Neuroscience

Background:

  • Network dynamics are crucial for cerebral cortex computation.
  • Understanding how these dynamics vary across cortical areas is limited.

Purpose of the Study:

  • To investigate how intrinsic timescales of cortical regions influence network dynamics.
  • To explore differences in network responses between a short-timescale visual area (VISp) and a long-timescale frontal area (MOs).

Main Methods:

  • Co-registered functional and spatial transcriptomics to link gene expression to cortical timescales.
  • Used simultaneous two-photon imaging and optogenetics in mice to probe network responses.
  • Applied focal excitatory input to VISp and MOs.

Main Results:

  • Cortical timescales are predicted by transcript categories related to circuit wiring.
  • MOs neurons showed higher responsiveness to neighbor photostimulation compared to VISp.
  • Network responses in MOs were longer-lasting than in VISp, driven by late-responding neurons forming activity sequences.

Conclusions:

  • Cortical areas possess distinct wiring that enables them to sustain input over different time windows through network dynamics.
  • These area-specific network dynamics have significant implications for cortical computation.