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Investigating attentional processes in depressive-like domestic horses (Equus caballus)

Abstract : Some captive/domestic animals respond to confinement by becoming inactive and unresponsive to external stimuli. Human inactivity is one of the behavioural markers of clinical depression, a mental disorder diagnosed by the co-occurrence of symptoms including deficit in selective attention. Some riding horses display ‘withdrawn’ states of inactivity and low responsiveness to stimuli that resemble the reduced engagement with their environment of some depressed patients. We hypothesized that ‘withdrawn’ horses experience a depressive-like state and evaluated their level of attention by confronting them with auditory stimuli. Five novel auditory stimuli were broadcasted to 27 horses, including 12 ‘withdrawn’ horses, for 5 days. The horses' reactions and durations of attention were recorded. Non-withdrawn horses reacted more and their attention lasted longer than that of withdrawn horses on the first day, but their durations of attention decreased over days, but those of withdrawn horses remained stable. These results suggest that the withdrawn horses' selective attention is altered, adding to already evidenced common features between this horses' state and human depression
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Contributor : Laurent Jonchère Connect in order to contact the contributor
Submitted on : Thursday, January 14, 2016 - 9:58:10 AM
Last modification on : Tuesday, February 1, 2022 - 11:40:40 AM

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Céline Rochais, Séverine Henry, Carole Fureix, Martine Hausberger. Investigating attentional processes in depressive-like domestic horses (Equus caballus). Behavioural Processes, Elsevier, 2016, 124, pp.93-96. ⟨10.1016/j.beproc.2015.12.010⟩. ⟨hal-01255832⟩



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