Electrical stimulation of rewarding hypothalamic sites in the 13-lined ground squirrel, Citellus tridecemlineatus, during hibernation: Sensitivity and thermogenic effects

William P. Clarke, William C. Hartner

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

1. 1. Ground squirrels were chronically prepared for the determination of hypothalamic stimulus thresholds during hibernation at brain temperatures (Tbr) of 9-15°C by observations of heart rate (HR), neck muscle activity (EMG) and Tbr changes. 2. 2. Preliminary tests on euthermic squirrels showed that the hypothalamic sites were rewarding since animals self-stimulated the sites at a rate proportional to the stimulus intensity. 3. 3. During bouts of hibernation, the threshold for increased HR varied from 2- to 5-fold but did not vary significantly with Tbr or the percentage of the hibernation bout elapsed. 4. 4. Stimulation of the hypothalamus resulted in rises of Tbr during hibernation only if the stimulus produced cardioacceleration.

Original languageEnglish (US)
Pages (from-to)479-486
Number of pages8
JournalComparative Biochemistry and Physiology -- Part A: Physiology
Volume69
Issue number3
DOIs
StatePublished - 1981
Externally publishedYes

ASJC Scopus subject areas

  • Physiology

Fingerprint Dive into the research topics of 'Electrical stimulation of rewarding hypothalamic sites in the 13-lined ground squirrel, Citellus tridecemlineatus, during hibernation: Sensitivity and thermogenic effects'. Together they form a unique fingerprint.

Cite this