Consiglio Nazionale delle Ricerche

Tipo di prodottoArticolo in rivista
TitoloEvaluation of Sheep Anticipatory Response to a Food Reward by Means of Functional Near-Infrared Spectroscopy
Anno di pubblicazione2019
Formato-
Autore/iChincarini, Matteo; Qiu, Lina; Spinelli, Lorenzo; Torricelli, Alessandro; Minero, Michela; Dalla Costa, Emanuela; Mariscoli, Massimo; Ferri, Nicola; Giammarco, Melania; Vignola, Giorgio
Affiliazioni autoriUniv Teramo; Politecn Milan; CNR; Univ Milan; Ist Zooprofilatt Sperimentale Abruzzo & Molise G
Autori CNR e affiliazioni
  • ALESSANDRO TORRICELLI
  • LORENZO CLEMENTE SPINELLI
Lingua/e
  • inglese
AbstractSimple Summary Anticipatory behaviour to an oncoming food reward can be triggered via classical conditioning, implies the activation of neural networks, and may serve to study the emotional state of animals. This work aimed to investigate how the anticipatory response affects cerebral cortex activity in sheep. Eight ewes were conditioned to associate a neutral auditory stimulus (water bubble) to a food reward (maize grains). Then, sheep were trained to wait 15 s before accessing the food (anticipatory phase). Behavioural reaction and changes in cortical oxy-haemoglobin ([O(2)Hb]) and deoxy-haemoglobin ([HHb]) concentration were recorded by functional near infrared spectroscopy (fNIRS). During the anticipatory phase, sheep increased their active behaviour together with a cortical activation (increase of [O(2)Hb] and a decrease of [HHb]) compared to baseline. Sheep showed a greater response of the right hemisphere compared to the left hemisphere, possibly indicating frustration. Behavioural and cortical changes observed during anticipation of a food reward reflect a learnt association and an increased arousal, but no clear emotional valence of the sheep subjective experience.
Lingua abstractinglese
Altro abstractAbstract Anticipatory behaviour to an oncoming food reward can be triggered via classical conditioning, implies the activation of neural networks, and may serve to study the emotional state of animals. The aim of this study was to investigate how the anticipatory response to a food reward affects the cerebral cortex activity in sheep. Eight ewes from the same flock were trained to associate a neutral auditory stimulus (water bubble) to the presence of a food reward (maize grains). Once conditioned, sheep were trained to wait 15 s behind a gate before accessing a bucket with food (anticipation phase). For 6 days, sheep were submitted to two sessions of six consecutive trials each. Behavioural reaction was filmed and changes in cortical oxy- and deoxy-hemoglobin concentration ([O(2)Hb] and [HHb] respectively) following neuronal activation were recorded by functional near infrared spectroscopy (fNIRS). Compared to baseline, during the anticipation phase sheep increased their active behaviour, kept the head oriented to the gate (Wilcoxon's signed rank test; p 0.001), and showed more asymmetric ear posture (Wilcoxon's signed rank test; p 0.01), most likely reflecting a learnt association and an increased arousal. Results of trial-averaged [O(2)Hb] and [HHb] within individual sheep showed in almost every sheep a cortical activation during the anticipation phase (Student T-test; p 0.05). The sheep showed a greater response of the right hemisphere compared to the left hemisphere, possibly indicating a negative affective state, such as frustration. Behavioural and cortical changes observed during anticipation of a food reward reflect a learnt association and an increased arousal, but no clear emotional valence of the sheep subjective experience. Future work should take into consideration possible factors affecting the accurateness of measures, such as probe's location and scalp vascularization.
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Pagine da-
Pagine a-
Pagine totali13
RivistaAnimals (Basel)
Attiva dal 2011
Editore: Molecular Diversity Preservation International - Basel
Lingua: inglese
ISSN: 2076-2615
Titolo chiave: Animals (Basel)
Titolo proprio: Animals. (Basel)
Titolo abbreviato: Animals (Basel)
Numero volume della rivista9
Fascicolo della rivista1
DOI10.3390/ani9010011
Verificato da refereeSì: Internazionale
Stato della pubblicazionePublished version
Indicizzazione (in banche dati controllate)
  • ISI Web of Science (WOS) (Codice:000459727300011)
  • Scopus (Codice:2-s2.0-85060053352)
Parole chiavefunctional near-infrared spectroscopy (fNIRS), sheep, anticipatory behaviour, animal welfare, neuroimaging
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Strutture CNR
  • IFN — Istituto di fotonica e nanotecnologie
Moduli/Attività/Sottoprogetti CNR-
Progetti Europei-
Allegati
Chincarini_Animals_2019 (documento privato )
Tipo documento: application/pdf