Linked Life Data

7310688

Source:http://linkedlifedata.com/resource/pubmed/id/7310688

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:dateCreated
1982-2-12
pubmed:abstractText
1. Thermodes were chronically implanted into various levels of the brain stem of sixteen Pekin ducks. The effects of local thermal stimulation on metabolic heat production, core temperature, peripheral skin temperature and respiratory frequency were investigated. 2. Four areas of thermode positions were determined according to the responses observed and were histologically identified at the end of the investigation. 3. Thermal stimulation of the lower mid-brain/upper pontine brain stem (Pos. III) elicited an increase in metabolic heat production, cutaneous vasoconstriction and rises in core temperature in response to cooling at thermoneutral and cold ambient conditions and, further, inhibition of panting by cooling and activation of panting by heating at warm ambient conditions. The metabolic response to cooling this brain stem section amounted to -0.1 W/kg. degrees C as compared with -7 W/kg. degrees C in response to total body cooling. 4. Cooling of the anterior and middle hypothalamus (Pos. II) caused vasodilatation in the skin and did not elicit shivering. The resulting drop in core temperature at a given degree of cooling was greater than the rise in core temperature in response to equivalent cooling of the lower mid-brain/upper pontine brain stem. 5. Cooling of the preoptic forebrain (Pos. I) and of the myelencephalon (Pos. IV) did not elicit thermoregulatory reactions. 6. It is concluded that the duck's brain stem contains thermoreceptive structures in the lower mid-brain/upper pontine section. However, the brain stem as a whole appears to contribute little to cold defence during general hypothermia because of the inhibitory effects originating in the anterior and middle hypothalamus. Cold defence in the duck, which is comparable in strength to that in mammals, has to rely on extracerebral thermosensory structures.
pubmed:commentsCorrections
http://linkedlifedata.com/resource/pubmed/commentcorrection/7310688-1034281, http://linkedlifedata.com/resource/pubmed/commentcorrection/7310688-4616314, http://linkedlifedata.com/resource/pubmed/commentcorrection/7310688-4627523, http://linkedlifedata.com/resource/pubmed/commentcorrection/7310688-4675231, http://linkedlifedata.com/resource/pubmed/commentcorrection/7310688-4698806, http://linkedlifedata.com/resource/pubmed/commentcorrection/7310688-5027101, http://linkedlifedata.com/resource/pubmed/commentcorrection/7310688-5376818, http://linkedlifedata.com/resource/pubmed/commentcorrection/7310688-565035, http://linkedlifedata.com/resource/pubmed/commentcorrection/7310688-571087, http://linkedlifedata.com/resource/pubmed/commentcorrection/7310688-571088, http://linkedlifedata.com/resource/pubmed/commentcorrection/7310688-572541, http://linkedlifedata.com/resource/pubmed/commentcorrection/7310688-696851, http://linkedlifedata.com/resource/pubmed/commentcorrection/7310688-7370767, http://linkedlifedata.com/resource/pubmed/commentcorrection/7310688-943780
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:month
May
pubmed:issn
0022-3751
pubmed:author
pubmed:issnType
Print
pubmed:volume
314
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
161-74
pubmed:dateRevised
2009-11-18
pubmed:meshHeading
pubmed:year
1981
pubmed:articleTitle
Brain stem sites mediating specific and non-specific temperature effects on thermoregulation in the pekin duck.
pubmed:publicationType
Journal Article