| Thermal dependence of serotonergic modulation of neural activity in the hamster. | |
| | |
MedLine Citation:
|
PMID: 2388182 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
1. The modulatory effect of serotonin on CA1 pyramidal cells in the hamster (Mesocricetus auratus) hippocampus was examined over a range of temperatures. 2. Following repetitive Schaffer collateral/commissural stimulation, changes in the amplitude of population spikes (the synchronous firing of CA1 pyramidal cells) were recorded in the hamster, a hibernator. Amplitudes were measured after 10 microM serotonin was added to and then withdrawn from the perfusing medium with the temperature of the bath fixed at different temperatures. 3. Between 35 degrees C and 15 degrees C a depression in population spike amplitude of at least 10% was seen in 36 of 43 trials, with an average depression of 68%. No significant temperature dependence of the depressive effect was seen. 4. Following the removal of serotonin from the perfusate, the spike amplitude was enhanced over the same range of temperatures, averaging 33% higher than control values. The enhancement was most pronounced at 35 degrees C and 15 degrees C and smallest at 25 degrees C. 5. Thus, over the entire temperature range of 35 degrees C to 15 degrees C, serotonin exerted a dual modulatory effect on the spike amplitude, a depression followed by an enhancement. Serotonin's modulatory effects on pyramidal cell excitation persist over temperatures encountered as the hamster enters hibernation. |
| | |
Authors:
|
D J Horrigan; J M Horowitz |
Publication Detail:
|
Type: In Vitro; Journal Article; Research Support, U.S. Gov't, Non-P.H.S. |
Journal Detail:
|
Title: Journal of comparative physiology. A, Sensory, neural, and behavioral physiology Volume: 167 ISSN: 0340-7594 ISO Abbreviation: J. Comp. Physiol. A Publication Date: 1990 May |
Date Detail:
|
Created Date: 1990-09-24 Completed Date: 1990-09-24 Revised Date: 2009-06-04 |
Medline Journal Info:
|
Nlm Unique ID: 8413199 Medline TA: J Comp Physiol A Country: GERMANY, WEST |
Other Details:
|
Languages: eng Pagination: 79-88 Citation Subset: IM; S |
Affiliation:
|
Department of Animal Physiology, University of California, Davis 95616. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Action Potentials
/
drug effects Animals Body Temperature Regulation / drug effects* Cold Temperature* Cricetinae / physiology* Hippocampus / drug effects, physiology* Male Mesocricetus / physiology* Reaction Time / drug effects Serotonin / physiology* |
| Chemical | |
Reg. No./Substance:
|
50-67-9/Serotonin |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Characterization of cardiac innervation in the nudibranch, Archidoris montereyensis.
Next Document: Medical aspects of recruiting for the Brigade of Gurkhas.