Document Detail


Discharge patterns of cochlear ganglion neurons in the chicken.
MedLine Citation:
PMID:  1583607     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Physiological recordings were made of the compound action potential from the round window and single neurons in the cochlear ganglion of normal adult chickens (Gallus domesticus). The compound action potential threshold to tone bursts decreased from approximately 42 dB at 0.25 kHz to 30 dB between 1 and 2 kHz and then increased to 51 dB at 4 kHz. Most of the cochlear ganglion cells had characteristic frequencies below 2 kHz and the thresholds of most neurons were roughly 30-35 dB lower than the compound action potential thresholds. At any given characteristic frequency, thresholds varied by as much as 60 dB and units with the highest thresholds tended to have the lowest spontaneous rates. Spontaneous discharge rates ranged from 0 to 200 spikes/s with a mean rage of 86 spikes/s. Interspike interval histograms of spontaneous activity often contained regular peaks with the time interval between peaks approximately equal to 1/(characteristic frequency). Tuning curves were sharply tuned and V-shaped with approximately equal slopes to the curves above and below characteristic frequency. Q10dB and Q30dB values for the tuning curves increased with characteristic frequency. Post stimulus time histograms showed sustained firing during the stimulus and were characterized by a slight-to-moderate peak at stimulus onset. Most units showed vigorous phase-locking to tones at characteristic frequency although the degree of phase-locking declined sharply with increasing characteristic frequency. Discharge rate-level functions at characteristic frequency had a mean dynamic range of 42 dB and a mean saturation firing rate of 327 spikes/s. In general, the firing patterns of cochlear ganglion neurons are similar in most respects to those reported in other avians, but differ in several important respects from those seen in mammals.
Authors:
R J Salvi; S S Saunders; N L Powers; F A Boettcher
Related Documents :
18046017 - Patterns of electrical propagation in the intact pregnant guinea pig uterus.
18632937 - Effect of stimulus intensity on the spike-local field potential relationship in the sec...
23767997 - Socially adjusted synchrony in the activity profiles of common marmosets in light-dark ...
14749307 - Intracortical pathways determine breadth of subthreshold frequency receptive fields in ...
22371437 - The time to passage of biological and complex motion.
8145587 - Grasp synthesis for upper-extremity fns. part 1. automated method for synthesising the ...
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Journal of comparative physiology. A, Sensory, neural, and behavioral physiology     Volume:  170     ISSN:  -     ISO Abbreviation:  J. Comp. Physiol. A     Publication Date:  1992 Feb 
Date Detail:
Created Date:  1992-06-17     Completed Date:  1992-06-17     Revised Date:  2014-07-21    
Medline Journal Info:
Nlm Unique ID:  8413199     Medline TA:  J Comp Physiol A     Country:  GERMANY    
Other Details:
Languages:  eng     Pagination:  227-41     Citation Subset:  IM    
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Acoustic Stimulation
Action Potentials / physiology
Animals
Chickens
Electrophysiology
Evoked Potentials / physiology
Neurons / physiology*
Spiral Ganglion / cytology,  physiology*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


Previous Document:  FMRFamide modulates the action of phase shifting agents on the ocular circadian pacemakers of Aplysi...
Next Document:  Azimuthal sound localization in the European starling (Sturnus vulgaris): I. Physical binaural cues.