| Hypothalamic network for thermoregulatory vasomotor control. | |
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MedLine Citation:
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PMID: 8048634 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Warming one side of a rat's preoptic area and anterior hypothalamus (POAH) causes skin vasodilation on both sides of the body, and the present study evaluated the extent to which signals mediating this vasodilation cross the midline within and below the POAH. Hind paw vasomotion during unilateral POAH thermal or electrical stimulation was measured for rats in which the POAH had been midsagittally transected and for rats in which one side of the hypothalamus had been coronally transected just below the POAH. In midsagittally transected rats, unilateral POAH thermal or electrical stimulation produced bilateral paw vasodilation, but the ipsilateral dilation occurred at a hypothalamic temperature lower than that at which contralateral dilation occurred. In the unilaterally transected rats, unilateral POAH warming produced bilateral vasodilation and, regardless of which side of the POAH was warmed, the threshold stimulus temperature was always lower for vasodilation on the intact side. Unilateral transection of a part of the hypothalamus that included the medial forebrain bundle had the same effect as did unilateral transection of the whole hypothalamus. Information controlling thermoregulatory vasomotion thus crosses the midline both within and below the POAH. Although efferent signals descending through the medial forebrain bundle innervate skin blood vessels on both sides of the body, this innervation is stronger on the ipsilateral side. |
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Authors:
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K Kanosue; M Yanase-Fujiwara; T Hosono |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: The American journal of physiology Volume: 267 ISSN: 0002-9513 ISO Abbreviation: Am. J. Physiol. Publication Date: 1994 Jul |
Date Detail:
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Created Date: 1994-09-01 Completed Date: 1994-09-01 Revised Date: 2008-11-21 |
Medline Journal Info:
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Nlm Unique ID: 0370511 Medline TA: Am J Physiol Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: R283-8 Citation Subset: IM |
Affiliation:
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Department of Physiology, Osaka University Medical School, Japan. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Animals Brain Mapping Denervation Efferent Pathways / physiology Electric Stimulation Hot Temperature Hypothalamus / physiology* Male Medial Forebrain Bundle / physiology Rats Rats, Wistar Vasomotor System / physiology* |
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