Linked Life Data

19490924

Source:http://linkedlifedata.com/resource/pubmed/id/19490924

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1-2
pubmed:dateCreated
2009-7-8
pubmed:abstractText
With the aim of judging emotional valence from an animal's perspective, multiple physiological variables were recorded in sheep when they were exposed to situations likely to induce negative and positive emotional states. Fourteen sheep were conditioned for several weeks to anticipate the delivery of standard feed. In three experimental trials carried out thereafter, the animals' expectations regarding feed quality were either fulfilled by offering the familiar standard feed (control), frustrated by giving unpalatable wooden pellets (negative treatment) or surpassed by delivering enriched feed (positive treatment). Heart rate, root mean square successive difference (RMSSD), respiration rate, body-surface humidity, body-surface temperature and percentage of eye white were recorded prior to the delivery of feed (anticipation phase) and during the delivery (feeding phase) of either standard feed, wooden pellets or enriched feed. Data were analysed using linear mixed-effects models. Heart rate, respiration rate and variability of body-surface humidity were high during the delivery of wooden pellets and low during the feeding phases with standard and enriched feed; RMSSD showed an inverse pattern. In addition, heart rate was increased during the first feeding phase after the one with standard feed, independent of its presumed valence, whereas differential reactions were observed in the second feeding phase after standard feed. The results show that presumed negative and positive emotional states in sheep differ in their physiological reactions. Despite a need for validation in additional situations, the combination of heart rate, respiration rate, RMSSD and body-surface humidity appeared to be most useful for assessing physiological correlates of negative and positive emotional reactions in sheep.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:month
Aug
pubmed:issn
1873-507X
pubmed:author
pubmed:issnType
Electronic
pubmed:day
4
pubmed:volume
98
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
235-41
pubmed:meshHeading
pubmed:year
2009
pubmed:articleTitle
Physiological expression of emotional reactions in sheep.
pubmed:affiliation
Centre for Proper Housing of Ruminants and Pigs, Federal Veterinary Office, Agroscope Reckenholz-Tänikon Research Station ART, Tänikon, 8356 Ettenhausen, Switzerland. Nadine.Reefmann@gmx.ch
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't