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pubmed-article:11318379pubmed:dateCreated2001-4-24lld:pubmed
pubmed-article:11318379pubmed:abstractTextPrevious studies have shown that inferior collicular neurons of the big brown bat, Eptesicus fuscus, serve as short-, band-, long- and all-pass filters for sound durations. Neurons with band-, short- and long-pass filtering characteristics discharged maximally to a specific sound duration or a range of sound durations. In contrast, neurons with all-pass filtering characteristics do not have duration selectivity. To determine if duration-tuning characteristics of collicular neurons were tolerant to changes in sound intensity, we examined the duration-tuning characteristics of collicular neurons using a wide range of sound intensities. Duration-tuning characteristics examined included the type, bandwidth and slope of duration-tuning curves. Sound intensity delivered within 20 dB of minimum threshold did not affect duration-tuning characteristics of all collicular neurons studied. Sound intensities at still higher levels did not affect the tuning characteristics of two-thirds of collicular neurons but decreased the duration selectivity and changed the duration-tuning curves of the remaining one-third of neurons from one type to another. However, these two groups of duration-tuning collicular neurons were not separately organized inside the inferior colliculus. The biological relevance of these findings to bat echolocation is discussed.lld:pubmed
pubmed-article:11318379pubmed:languageenglld:pubmed
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pubmed-article:11318379pubmed:statusMEDLINElld:pubmed
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pubmed-article:11318379pubmed:issn0340-7594lld:pubmed
pubmed-article:11318379pubmed:authorpubmed-author:ZhouXXlld:pubmed
pubmed-article:11318379pubmed:authorpubmed-author:JenP HPHlld:pubmed
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pubmed-article:11318379pubmed:volume187lld:pubmed
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pubmed-article:11318379pubmed:pagination63-73lld:pubmed
pubmed-article:11318379pubmed:dateRevised2009-6-4lld:pubmed
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pubmed-article:11318379pubmed:year2001lld:pubmed
pubmed-article:11318379pubmed:articleTitleThe effect of sound intensity on duration-tuning characteristics of bat inferior collicular neurons.lld:pubmed
pubmed-article:11318379pubmed:affiliationDivision of Biological Sciences, University of Missouri-Columbia, 65211, USA. jenp@missouri.edulld:pubmed
pubmed-article:11318379pubmed:publicationTypeJournal Articlelld:pubmed
pubmed-article:11318379pubmed:publicationTypeResearch Support, U.S. Gov't, Non-P.H.S.lld:pubmed
pubmed-article:11318379pubmed:publicationTypeResearch Support, Non-U.S. Gov'tlld:pubmed