INTENSE VASOCONSTRICTION AND BRADYCARDIA EVOKED BY STIMULATION OF NEURONES WITHIN THE MIDBRAIN VENTRAL TEGMENTUM OF THE RABBIT

Esther Tan*, A. K. Goodchild, R. A L Dampney

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

Abstract

1. Electrical stimulation of sites in the midbrain ventral tegmental area (VTA) and the lateral hypothalamic area of the anaesthetized rabbit elicited intense vasoconstriction and profound bradycardia. 2. The same effects were elicited by microinjections of glutamate ions into the VTA but not the lateral hypothalamic area. 3. Following baroreceptor denervation, the bradycardic component of the response was greatly reduced, but the vasoconstrictor component was unaffected. 4. It is concluded that the cardiovascular response is generated by excitation of a cell group within the VTA, but within the hypothalamus the response arises from excitation of axons of passage.

Original languageEnglish
Pages (from-to)305-309
Number of pages5
JournalClinical and Experimental Pharmacology and Physiology
Volume10
Issue number3
DOIs
Publication statusPublished - 1983
Externally publishedYes

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