Differential synaptic processing separates stationary from transient inputs to the auditory cortex

Marco Atzori, Saobo Lei, D. Ieuan P. Evans, Patrick O. Kanold, Emily Phillips-Tansey, Orinthal McIntyre, Chris J. McBain

Research output: Contribution to journalArticlepeer-review

Abstract

Sound features are blended together en route to the central nervous system before being discriminated for further processing by the cortical synaptic network. The mechanisms underlying this synaptic processing, however, are largely unexplored. Intracortical processing of the auditory signal was investigated by simultaneously recording from pairs of connected principal neurons in layer II/III in slices from A1 auditory cortex. Physiological patterns of stimulation in the presynaptic cell revealed two populations of postsynaptic events that differed in mean amplitude, failure rate, kinetics and short-term plasticity. In contrast, transmission between layer II/III pyramidal neurons in barrel cortex were uniformly of large amplitude and high success (release) probability (Pr). These unique features of auditory cortical transmission may provide two distinct mechanisms for discerning and separating transient from stationary features of the auditory signal at an early stage of cortical processing.

Original languageEnglish (US)
Pages (from-to)1230-1237
Number of pages8
JournalNature neuroscience
Volume4
Issue number12
DOIs
StatePublished - 2001

ASJC Scopus subject areas

  • Neuroscience(all)

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