Error correction and improved precision of spike timing in converging cortical networks

Amir Levi, Lidor Spivak, Hadas E. Sloin, Shirly Someck, Eran Stark

Research output: Contribution to journalArticlepeer-review

Abstract

The brain propagates neuronal signals accurately and rapidly. Nevertheless, whether and how a pool of cortical neurons transmits an undistorted message to a target remains unclear. We apply optogenetic white noise signals to small assemblies of cortical pyramidal cells (PYRs) in freely moving mice. The directly activated PYRs exhibit a spike timing precision of several milliseconds. Instead of losing precision, interneurons driven via synaptic activation exhibit higher precision with respect to the white noise signal. Compared with directly activated PYRs, postsynaptic interneuron spike trains allow better signal reconstruction, demonstrating error correction. Data-driven modeling shows that nonlinear amplification of coincident spikes can generate error correction and improved precision. Over multiple applications of the same signal, postsynaptic interneuron spiking is most reliable at timescales ten times shorter than those of the presynaptic PYR, exhibiting temporal coding. Similar results are observed in hippocampal region CA1. Coincidence detection of convergent inputs enables messages to be precisely propagated between cortical PYRs and interneurons.

Original languageEnglish
Article number111383
JournalCell Reports
Volume40
Issue number12
DOIs
StatePublished - 20 Sep 2022

Keywords

  • coding
  • CP: Neuroscience
  • electrophysiology
  • extracellular
  • freely moving
  • hippocampus
  • mouse model
  • neocortex
  • optogenetics
  • spike transmission
  • synaptic connectivity
  • temporal precision

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