Document Detail


The ventrolateral medulla of the cat mediates vestibulosympathetic reflexes.
MedLine Citation:
PMID:  1913189     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Extracellular recordings were made from 94 neurons located in the ventrolateral medulla (VLM) whose firing rate was affected by vestibular nerve (VN) stimulation; 50 of these units were in the subretrofacial (SRF) nucleus, which contains cells that make direct excitatory connections with sympathetic preganglionic neurons. The sample included 12 SRF cells which were antidromically driven from the upper thoracic spinal cord and had conduction velocities of 10 m/s or less; the effect of VN stimulation on all but one of these units was inhibition. The onset latency of the response to VN stimulation was long [20.3 +/- 3.7 (S.E.M.) ms, n = 9, for the antidromically activated neurons and 12.1 +/- 1.2 ms, n = 73, for the others], suggesting that the effects were predominantly polysynaptic. In addition, most of the spontaneously active units tested (33/36) received convergent inputs from the carotid sinus nerve (CSN), as would be expected for neurons which influence sympathetic outflow. Vestibular-elicited inhibition of SRF neurons with projections to the intermediolateral cell column could account for late, long duration inhibition of sympathetic discharges produced by labyrinth stimulation.
Authors:
B J Yates; Y Yamagata; P S Bolton
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Brain research     Volume:  552     ISSN:  0006-8993     ISO Abbreviation:  Brain Res.     Publication Date:  1991 Jun 
Date Detail:
Created Date:  1991-10-31     Completed Date:  1991-10-31     Revised Date:  2007-11-14    
Medline Journal Info:
Nlm Unique ID:  0045503     Medline TA:  Brain Res     Country:  NETHERLANDS    
Other Details:
Languages:  eng     Pagination:  265-72     Citation Subset:  IM; S    
Affiliation:
Laboratory of Neurophysiology, Rockefeller University, New York, NY 10021-6399.
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MeSH Terms
Descriptor/Qualifier:
Afferent Pathways / physiology
Animals
Cats
Electric Stimulation
Ganglia, Sympathetic / physiology*
Medulla Oblongata / physiology*
Neural Conduction
Neurons / physiology*
Reflex*
Vestibular Nerve / physiology*
Grant Support
ID/Acronym/Agency:
DC-00693/DC/NIDCD NIH HHS; NS-02619/NS/NINDS NIH HHS

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


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