Counting on dis-inhibition: a circuit motif for interval counting and selectivity in the anuran auditory system

Journal of Neurophysiology
Richard NaudAndre Longtin

Abstract

Information can be encoded in the temporal patterning of spikes. How the brain reads these patterns is of general importance and represents one of the greatest challenges in neuroscience. We addressed this issue in relation to temporal pattern recognition in the anuran auditory system. Many species of anurans perform mating decisions based on the temporal structure of advertisement calls. One important temporal feature is the number of sound pulses that occur with a species-specific interpulse interval. Neurons representing this pulse count have been recorded in the anuran inferior colliculus, but the mechanisms underlying their temporal selectivity are incompletely understood. Here, we construct a parsimonious model that can explain the key dynamical features of these cells with biologically plausible elements. We demonstrate that interval counting arises naturally when combining interval-selective inhibition with pulse-per-pulse excitation having both fast- and slow-conductance synapses. Interval-dependent inhibition is modeled here by a simple architecture based on known physiology of afferent nuclei. Finally, we consider simple implementations of previously proposed mechanistic explanations for these counting neurons and sh...Continue Reading

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Citations

May 10, 2019·PLoS Computational Biology·Amitabha BoseJohn Rinzel
Jan 3, 2018·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Gary J Rose
Jan 3, 2018·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·Peter SkorupskiLars Chittka
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Jun 26, 2020·Frontiers in Neuroscience·Frank Klefenz, Tamas Harczos
Mar 17, 2021·The Journal of Experimental Biology·Andreas Nieder
Nov 20, 2021·The Journal of Experimental Biology·Saumya GuptaMark A Bee

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