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 language | English (US) |
|---|---|
| Pages (from-to) | 479-486 |
| Number of pages | 8 |
| Journal | Comparative Biochemistry and Physiology, Part A |
| Volume | 69 |
| Issue number | 3 |
| State | Published - 1981 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Physiology
- Molecular Biology
- Biochemistry
Cite this
Electrical stimulation of rewarding hypothalamic sites in the 13-lined ground squirrel, Citellus tridecemlineatus, during hibernation : Sensitivity and thermogenic effects. / Clarke, William P; Hartner, William C.
In: Comparative Biochemistry and Physiology, Part A, Vol. 69, No. 3, 1981, p. 479-486.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Electrical stimulation of rewarding hypothalamic sites in the 13-lined ground squirrel, Citellus tridecemlineatus, during hibernation
T2 - Sensitivity and thermogenic effects
AU - Clarke, William P
AU - Hartner, William C.
PY - 1981
Y1 - 1981
N2 - 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.
AB - 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.
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UR - http://www.scopus.com/inward/citedby.url?scp=49149137907&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:49149137907
VL - 69
SP - 479
EP - 486
JO - Comparative Biochemistry and Physiology - A Physiology
JF - Comparative Biochemistry and Physiology - A Physiology
SN - 1095-6433
IS - 3
ER -