PMID: 11913816Mar 27, 2002Paper

Coding of a sexually dimorphic song feature by auditory interneurons of grasshoppers: the role of leading inhibition

Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology
Rüdiger KraheB Ronacher

Abstract

The shape of stimulus onset is a distinct feature of many acoustic communication signals. In some grasshopper species the steepness of amplitude rise of the pulses which comprise the song subunits is sexually dimorphic and a major criterion of sex recognition. Here, we describe potential mechanisms by which auditory interneurons could transmit the information on onset steepness from the metathoracic ganglion to the brain of the grasshopper. Since no single interneuron unequivocally encoded onset steepness, it appears that this information has to reside in the relative spike counts or the relative spike timing of a small group of ascending auditory interneurons. The decisive component of this mechanism seems to be the steepness-dependent leading inhibition displayed by two interneurons (AN3, AN4). The inhibition increased with increasing onset steepness, thus delayed the excitatory response, and in one interneuron even strongly reduced the spike count. Other ascending interneurons, whose responses were little affected by onset steepness, could serve as reference neurons (AN6, AN12). Thus, our results suggest that a comparison of both, spike count and first-spike timing within a small set of ascending interneurons could yield the...Continue Reading

Citations

Nov 29, 2007·Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology·A SchmidtR M Hennig
Sep 17, 2009·Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology·R Matthias Hennig
Nov 11, 2010·Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology·Daniela NeuhoferBernhard Ronacher
Aug 10, 2011·Proceedings of the National Academy of Sciences of the United States of America·Jan ClemensSandra Wohlgemuth
May 29, 2008·Proceedings. Biological Sciences·Daniela NeuhoferBernhard Ronacher
Feb 10, 2010·Neural Computation·Felix CreutzigAndreas V M Herz
Jun 26, 2012·Journal of Physiology, Paris·Bernhard Ronacher, Nicole Stange
Dec 1, 2009·Journal of Physiology, Paris·Hugo G Eyherabide, Inés Samengo
Sep 4, 2015·Journal of Neuroscience Methods·Mit Balvantray BhavsarAndreas Stumpner
Mar 18, 2005·Journal of Neurophysiology·Alexander V GalazyukAlbert S Feng
Dec 16, 2005·Journal of Neurophysiology·Ariel RokemInés Samengo
Dec 1, 2006·Journal of Neurophysiology·S V Voytenko, A V Galazyuk
Nov 23, 2019·The Journal of Experimental Biology·Michael S Reichert, Bernhard Ronacher
Jan 3, 2018·Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology·Stefanie Krämer, Bernhard Ronacher

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