Grooming, body extension, and vasomotor responses induced by hypothalamic warming at different ambient temperatures in rats

Hideto Tanaka; Kazuyuki Kanosue; Teruo Nakayama; Zaiwen Shen

doi:10.1016/0031-9384(86)90145-9

Grooming, body extension, and vasomotor responses induced by hypothalamic warming at different ambient temperatures in rats

Hideto Tanaka, Kazuyuki Kanosue, Teruo Nakayama^*, Zaiwen Shen

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

33 Citations (Scopus)

Abstract

During heat stress, rats extend their body and spread saliva onto their body surfaces (grooming) for evaporative heat loss in addition to tail vasodilation. We investigated the effects of changing hypothalamic (T_hy) and ambient (T_a) temperatures on these thermoregulatory responses. The higher the T_a, the lower the T_hy at which grooming started when T_a was changed from the thermoneutral zone (24°C) to 28-40°C. At any T_a grooming was induced only when the posterior hypothalamic region (PH) was warmed by implanted diathermy. Grooming was more strongly induced at a T_a of 28°C than at 24°C. At a T_a of 32°C, PH warming evoked body extension as well, decreasing the duration of grooming as compared to that at 28°C. Warming the preoptic area and anterior hypothalamus induced body extension and tail vasodilation regardless of T_a. The data suggest that grooming was induced by integrated temperature signals from the PH and from the peripheral skin.

Original language	English
Pages (from-to)	145-151
Number of pages	7
Journal	Physiology and Behavior
Volume	38
Issue number	1
DOIs	https://doi.org/10.1016/0031-9384(86)90145-9
Publication status	Published - 1986
Externally published	Yes

Keywords

Ambient temperature
Body extension
Grooming
Hypothalamic temperature
Rat
Thermal stimulation
Vasomotor activity

ASJC Scopus subject areas

Experimental and Cognitive Psychology
Behavioral Neuroscience

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10.1016/0031-9384(86)90145-9

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title = "Grooming, body extension, and vasomotor responses induced by hypothalamic warming at different ambient temperatures in rats",

abstract = "During heat stress, rats extend their body and spread saliva onto their body surfaces (grooming) for evaporative heat loss in addition to tail vasodilation. We investigated the effects of changing hypothalamic (Thy) and ambient (Ta) temperatures on these thermoregulatory responses. The higher the Ta, the lower the Thy at which grooming started when Ta was changed from the thermoneutral zone (24°C) to 28-40°C. At any Ta grooming was induced only when the posterior hypothalamic region (PH) was warmed by implanted diathermy. Grooming was more strongly induced at a Ta of 28°C than at 24°C. At a Ta of 32°C, PH warming evoked body extension as well, decreasing the duration of grooming as compared to that at 28°C. Warming the preoptic area and anterior hypothalamus induced body extension and tail vasodilation regardless of Ta. The data suggest that grooming was induced by integrated temperature signals from the PH and from the peripheral skin.",

keywords = "Ambient temperature, Body extension, Grooming, Hypothalamic temperature, Rat, Thermal stimulation, Vasomotor activity",

author = "Hideto Tanaka and Kazuyuki Kanosue and Teruo Nakayama and Zaiwen Shen",

note = "Funding Information: This study was supported in part by a Grant-in-Aid for Scientific Research from the Ministry of Education, Science and Culture of Japan (Grant No. 59440026).",

year = "1986",

doi = "10.1016/0031-9384(86)90145-9",

language = "English",

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pages = "145--151",

journal = "Physiology and Behavior",

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AU - Tanaka, Hideto

AU - Kanosue, Kazuyuki

AU - Nakayama, Teruo

AU - Shen, Zaiwen

N1 - Funding Information: This study was supported in part by a Grant-in-Aid for Scientific Research from the Ministry of Education, Science and Culture of Japan (Grant No. 59440026).

PY - 1986

Y1 - 1986

N2 - During heat stress, rats extend their body and spread saliva onto their body surfaces (grooming) for evaporative heat loss in addition to tail vasodilation. We investigated the effects of changing hypothalamic (Thy) and ambient (Ta) temperatures on these thermoregulatory responses. The higher the Ta, the lower the Thy at which grooming started when Ta was changed from the thermoneutral zone (24°C) to 28-40°C. At any Ta grooming was induced only when the posterior hypothalamic region (PH) was warmed by implanted diathermy. Grooming was more strongly induced at a Ta of 28°C than at 24°C. At a Ta of 32°C, PH warming evoked body extension as well, decreasing the duration of grooming as compared to that at 28°C. Warming the preoptic area and anterior hypothalamus induced body extension and tail vasodilation regardless of Ta. The data suggest that grooming was induced by integrated temperature signals from the PH and from the peripheral skin.

AB - During heat stress, rats extend their body and spread saliva onto their body surfaces (grooming) for evaporative heat loss in addition to tail vasodilation. We investigated the effects of changing hypothalamic (Thy) and ambient (Ta) temperatures on these thermoregulatory responses. The higher the Ta, the lower the Thy at which grooming started when Ta was changed from the thermoneutral zone (24°C) to 28-40°C. At any Ta grooming was induced only when the posterior hypothalamic region (PH) was warmed by implanted diathermy. Grooming was more strongly induced at a Ta of 28°C than at 24°C. At a Ta of 32°C, PH warming evoked body extension as well, decreasing the duration of grooming as compared to that at 28°C. Warming the preoptic area and anterior hypothalamus induced body extension and tail vasodilation regardless of Ta. The data suggest that grooming was induced by integrated temperature signals from the PH and from the peripheral skin.

KW - Ambient temperature

KW - Body extension

KW - Grooming

KW - Hypothalamic temperature

KW - Rat

KW - Thermal stimulation

KW - Vasomotor activity

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Grooming, body extension, and vasomotor responses induced by hypothalamic warming at different ambient temperatures in rats

Abstract

Keywords

ASJC Scopus subject areas

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