GABAergic and glycinergic neural inhibition in excitatory frequency tuning of bat inferior collicular neurons.

GABAergic and glycinergic neural inhibition in excitatory frequency tuning of bat inferior collicular neurons. Research Abstract Details 

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GABAergic and glycinergic neural inhibition in excitatory frequency tuning of bat inferior collicular neurons. Abstract Text:

Y Lu,P H Jen,

This study examined the effect of GABAergic and glycinergic inhibition on excitatory frequency tuning curves (FTCs) of inferior collicular (IC) neurons of the big brown bat, Eptesicus fuscus. The excitatory FTCs of 70 IC neurons were either V-shaped (57, 81%), closed (11, 16%), or double-peaked (2, 3%). By means of a two-tone stimulation paradigm, inhibitory FTCs were obtained at one frequency flank only (low-frequency flank: 11, 16%; high-frequency flank: 7, 10%), at both frequency flanks (36, 51%) of excitatory FTCs, or between two excitatory FTCs (2, 3%). IC neurons that had inhibitory FTCs typically had larger Q(10) and Q(30) values (i.e., sharper excitatory FTCs) than neurons that did not have inhibitory FTCs. Neurons with inhibitory FTCs at both frequency flanks had larger Q(10) and Q(30) values than neurons with inhibitory FTCs at one frequency flank only. IC neurons with a small difference between excitatory and inhibitory best frequencies typically had sharper excitatory frequency tuning. Bicuculline (an antagonist for GABAA) application produced a greater degree of abolishing inhibitory FTCs than strychnine (an antagonist for glycine) application. Application of both drugs was most effective in abolishing the inhibitory FTCs of IC neurons. The implications of these findings for bat echolocation are discussed.

GABAergic and glycinergic neural inhibition in excitatory frequency tuning of bat inferior collicular neurons. Publishing Authors By Initials

Y Lu,PH Jen,

For similar organic chemicals: carboxylic acids: acids, acyclic: butyric acids: aminobutyric acids: gamma-aminobutyric acid research abstracts see: organic chemicals: carboxylic acids: acids, acyclic: butyric acids: aminobutyric acids: gamma-aminobutyric acid research

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GABAergic and glycinergic neural inhibition in excitatory frequency tuning of bat inferior collicular neurons. Journal Published:

PUBLICATION TYPE: Research Support, U.S. Gov't,

Journal: Experimental brain research. Experimentelle Hirnfo

VOLUME: 141

Page Numbers: 331-9

Journal Abbreviation:

ISSN: 0014-4819

DAY: 15

MONTH: Dec

YEAR: 2001

GABAergic and glycinergic neural inhibition in excitatory frequency tuning of bat inferior collicular neurons. Information

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LANGUAGE: eng

NlmUniqueID: 43312

GABAergic and glycinergic neural inhibition in excitatory frequency tuning of bat inferior collicular neurons. Keywords Mesh Terms:

KEYWORDS: gamma-Aminobutyric Acid

MESH TERMS: physiology

Chemical & Substance for Abstract: GABAergic and glycinergic neural inhibition in excitatory frequency tuning of bat inferior collicular neurons. Information

Substance Name: Strychnine

Registry Number: 57-24-9

Grant and Affiliation Information for GABAergic and glycinergic neural inhibition in excitatory frequency tuning of bat inferior collicular neurons.

AFFILIATION: Division of Biological Sciences, University of Missouri-Columbia, MO 65211, USA.

Country: Germany

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MEDLINETA: Exp Brain Res

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