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Valence of physical stimuli, not housing conditions, affects behaviour and frontal cortical brain activity in sheep.
Behav Brain Res 2014; 267:144-55BB

Abstract

Modulation of short-term emotions by long-term mood is little understood but relevant to understand the affective system and of importance in respect to animal welfare: a negative mood might taint experiences, whilst a positive mood might alleviate single negative events. To induce different mood states in sheep housing conditions were varied. Fourteen ewes were group-housed in an unpredictable, stimulus-poor and 15 ewes in a predictable, stimulus-rich environment. Sheep were tested individually for mood in a behavioural cognitive bias paradigm. Also, their reactions to three physical stimuli thought to differ in their perceived valence were observed (negative: pricking, intermediate: slight pressure, positive: kneading). General behaviour, activity, ear movements and positions, and haemodynamic changes in the cortical brain were recorded during stimulations. Generalised mixed-effects models and model probabilities based on the BIC (Bayesian information criterion) were used. Only weak evidence for mood difference was found. Sheep from the unpredictable, stimulus-poor housing condition had a somewhat more negative cognitive bias, showed slightly more aversive behaviour, were slightly more active and moved their ears somewhat more. Sheep most clearly differentiated the negative from the intermediate and positive stimulus in that they exhibited more aversive behaviour, less nibbling, were more active, showed more ear movements, more forward ear postures, fewer backward ear postures, and a stronger decrease in deoxyhaemoglobin when subjected to the negative stimulus. In conclusion, sheep reacted towards stimuli according to their presumed valence but their mood was not strongly influenced by housing conditions. Therefore, behavioural reactions and cortical brain activity towards the stimuli were hardly modulated by housing conditions.

Authors+Show Affiliations

Centre for Proper Housing of Ruminants and Pigs, Federal Food Safety and Veterinary Office FSVO, Agroscope, Institute for Livestock Sciences, Tänikon, CH-8356 Ettenhausen, Switzerland; Animal Behaviour, Institute of Evolutionary Biology and Environmental Studies, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland.Centre for Proper Housing of Ruminants and Pigs, Federal Food Safety and Veterinary Office FSVO, Agroscope, Institute for Livestock Sciences, Tänikon, CH-8356 Ettenhausen, Switzerland; Animal Behaviour, Institute of Evolutionary Biology and Environmental Studies, University of Zurich, Winterthurerstrasse 190, CH-8057 Zurich, Switzerland.Biomedical Optics Research Laboratory, Division of Neonatology, University Hospital Zurich, Frauenklinikstrasse 10, CH-8091 Zurich, Switzerland.Centre for Proper Housing of Ruminants and Pigs, Federal Food Safety and Veterinary Office FSVO, Agroscope, Institute for Livestock Sciences, Tänikon, CH-8356 Ettenhausen, Switzerland.Centre for Proper Housing of Ruminants and Pigs, Federal Food Safety and Veterinary Office FSVO, Agroscope, Institute for Livestock Sciences, Tänikon, CH-8356 Ettenhausen, Switzerland. Electronic address: lorenz.gygax@agroscope.admin.ch.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

24681090

Citation

Vögeli, Sabine, et al. "Valence of Physical Stimuli, Not Housing Conditions, Affects Behaviour and Frontal Cortical Brain Activity in Sheep." Behavioural Brain Research, vol. 267, 2014, pp. 144-55.
Vögeli S, Lutz J, Wolf M, et al. Valence of physical stimuli, not housing conditions, affects behaviour and frontal cortical brain activity in sheep. Behav Brain Res. 2014;267:144-55.
Vögeli, S., Lutz, J., Wolf, M., Wechsler, B., & Gygax, L. (2014). Valence of physical stimuli, not housing conditions, affects behaviour and frontal cortical brain activity in sheep. Behavioural Brain Research, 267, pp. 144-55. doi:10.1016/j.bbr.2014.03.036.
Vögeli S, et al. Valence of Physical Stimuli, Not Housing Conditions, Affects Behaviour and Frontal Cortical Brain Activity in Sheep. Behav Brain Res. 2014 Jul 1;267:144-55. PubMed PMID: 24681090.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Valence of physical stimuli, not housing conditions, affects behaviour and frontal cortical brain activity in sheep. AU - Vögeli,Sabine, AU - Lutz,Janika, AU - Wolf,Martin, AU - Wechsler,Beat, AU - Gygax,Lorenz, Y1 - 2014/03/26/ PY - 2013/11/17/received PY - 2014/03/17/revised PY - 2014/03/18/accepted PY - 2014/4/1/entrez PY - 2014/4/1/pubmed PY - 2014/12/17/medline KW - Cognitive bias KW - Ear movements KW - Emotion KW - Functional near-infrared spectroscopy (fNIRS) KW - Mood SP - 144 EP - 55 JF - Behavioural brain research JO - Behav. Brain Res. VL - 267 N2 - Modulation of short-term emotions by long-term mood is little understood but relevant to understand the affective system and of importance in respect to animal welfare: a negative mood might taint experiences, whilst a positive mood might alleviate single negative events. To induce different mood states in sheep housing conditions were varied. Fourteen ewes were group-housed in an unpredictable, stimulus-poor and 15 ewes in a predictable, stimulus-rich environment. Sheep were tested individually for mood in a behavioural cognitive bias paradigm. Also, their reactions to three physical stimuli thought to differ in their perceived valence were observed (negative: pricking, intermediate: slight pressure, positive: kneading). General behaviour, activity, ear movements and positions, and haemodynamic changes in the cortical brain were recorded during stimulations. Generalised mixed-effects models and model probabilities based on the BIC (Bayesian information criterion) were used. Only weak evidence for mood difference was found. Sheep from the unpredictable, stimulus-poor housing condition had a somewhat more negative cognitive bias, showed slightly more aversive behaviour, were slightly more active and moved their ears somewhat more. Sheep most clearly differentiated the negative from the intermediate and positive stimulus in that they exhibited more aversive behaviour, less nibbling, were more active, showed more ear movements, more forward ear postures, fewer backward ear postures, and a stronger decrease in deoxyhaemoglobin when subjected to the negative stimulus. In conclusion, sheep reacted towards stimuli according to their presumed valence but their mood was not strongly influenced by housing conditions. Therefore, behavioural reactions and cortical brain activity towards the stimuli were hardly modulated by housing conditions. SN - 1872-7549 UR - https://www.unboundmedicine.com/medline/citation/24681090/Valence_of_physical_stimuli_not_housing_conditions_affects_behaviour_and_frontal_cortical_brain_activity_in_sheep_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0166-4328(14)00190-9 DB - PRIME DP - Unbound Medicine ER -