Location of CNS neurons mediating the blood pressure fall after shock-induced fighting in the rat.

Published

Journal Article

Previous research has demonstrated a fall in systolic blood pressure in the rat measured 2--5 min following shock-induced fighting. This blood pressure fall appears to depend on intact CNS catecholamine neurons. The locus coeruleus is known to supply noradrenergic neuron terminals to much of the brain. In this study, we attempted to identify the location of the CNS catecholamine neurons mediating the blood pressure response to fighting by studying the blood pressure response to shock-induced fighting in locus coeruleus-lesioned and shamlesioned rats. The locus coeruleus-lesioned animals showed a blood pressure increase after fighting on the average across 2 days of testing, while sham-lesioned animals showed a blood pressure decrease after fighting. The difference between the blood pressure responses of the two groups was highly reliable. Since both histofluorescence and biochemical studies indicated that CNS norepinephrine levels were decreased in lesioned as compared to control animals, the findings are interpreted as showing that noradrenergic neurons originating in the locus coeruleus play an important role in mediating aspects of the relationship between fighting behavior and blood pressure response.

Full Text

Duke Authors

Cited Authors

  • Williams, RB; Richardson, JS; Eichelman, BS

Published Date

  • June 1978

Published In

Volume / Issue

  • 1 / 2

Start / End Page

  • 177 - 185

PubMed ID

  • 574164

Pubmed Central ID

  • 574164

International Standard Serial Number (ISSN)

  • 0160-7715

Digital Object Identifier (DOI)

  • 10.1007/bf00846638

Language

  • eng

Conference Location

  • United States