Horses show individual level lateralisation when inspecting an unfamiliar and unexpected stimulus.

Animals must attend to a diverse array of stimuli in their environments. The emotional valence and salience of a stimulus can affect how this information is processed in the brain. Many species preferentially attend to negatively valent stimuli using the sensory organs on the left side of their body...

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Autores principales:	Paolo Baragli, Chiara Scopa, Martina Felici, Adam R Reddon
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/b03476f37b024cab99451a92668a0e6a
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spelling	oai:doaj.org-article:b03476f37b024cab99451a92668a0e6a2021-12-02T20:15:11ZHorses show individual level lateralisation when inspecting an unfamiliar and unexpected stimulus.1932-620310.1371/journal.pone.0255688https://doaj.org/article/b03476f37b024cab99451a92668a0e6a2021-01-01T00:00:00Zhttps://doi.org/10.1371/journal.pone.0255688https://doaj.org/toc/1932-6203Animals must attend to a diverse array of stimuli in their environments. The emotional valence and salience of a stimulus can affect how this information is processed in the brain. Many species preferentially attend to negatively valent stimuli using the sensory organs on the left side of their body and hence the right hemisphere of their brain. Here, we investigated the lateralisation of visual attention to the rapid appearance of a stimulus (an inflated balloon) designed to induce an avoidance reaction and a negatively valent emotional state in 77 Italian saddle horses. Horses' eyes are laterally positioned on the head, and each eye projects primarily to the contralateral hemisphere, allowing eye use to be a proxy for preferential processing in one hemisphere of the brain. We predicted that horses would inspect the novel and unexpected stimulus with their left eye and hence right hemisphere. We found that horses primarily inspected the balloon with one eye, and most horses had a preferred eye to do so, however, we did not find a population level tendency for this to be the left or the right eye. The strength of this preference tended to decrease over time, with the horses using their non-preferred eye to inspect the balloon increasingly as the trial progressed. Our results confirm a lateralised eye use tendency when viewing negatively emotionally valent stimuli in horses, in agreement with previous findings. However, there was not any alignment of lateralisation at the group level in our sample, suggesting that the expression of lateralisation in horses depends on the sample population and testing context.Paolo BaragliChiara ScopaMartina FeliciAdam R ReddonPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 16, Iss 8, p e0255688 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Paolo Baragli Chiara Scopa Martina Felici Adam R Reddon Horses show individual level lateralisation when inspecting an unfamiliar and unexpected stimulus.
description	Animals must attend to a diverse array of stimuli in their environments. The emotional valence and salience of a stimulus can affect how this information is processed in the brain. Many species preferentially attend to negatively valent stimuli using the sensory organs on the left side of their body and hence the right hemisphere of their brain. Here, we investigated the lateralisation of visual attention to the rapid appearance of a stimulus (an inflated balloon) designed to induce an avoidance reaction and a negatively valent emotional state in 77 Italian saddle horses. Horses' eyes are laterally positioned on the head, and each eye projects primarily to the contralateral hemisphere, allowing eye use to be a proxy for preferential processing in one hemisphere of the brain. We predicted that horses would inspect the novel and unexpected stimulus with their left eye and hence right hemisphere. We found that horses primarily inspected the balloon with one eye, and most horses had a preferred eye to do so, however, we did not find a population level tendency for this to be the left or the right eye. The strength of this preference tended to decrease over time, with the horses using their non-preferred eye to inspect the balloon increasingly as the trial progressed. Our results confirm a lateralised eye use tendency when viewing negatively emotionally valent stimuli in horses, in agreement with previous findings. However, there was not any alignment of lateralisation at the group level in our sample, suggesting that the expression of lateralisation in horses depends on the sample population and testing context.
format	article
author	Paolo Baragli Chiara Scopa Martina Felici Adam R Reddon
author_facet	Paolo Baragli Chiara Scopa Martina Felici Adam R Reddon
author_sort	Paolo Baragli
title	Horses show individual level lateralisation when inspecting an unfamiliar and unexpected stimulus.
title_short	Horses show individual level lateralisation when inspecting an unfamiliar and unexpected stimulus.
title_full	Horses show individual level lateralisation when inspecting an unfamiliar and unexpected stimulus.
title_fullStr	Horses show individual level lateralisation when inspecting an unfamiliar and unexpected stimulus.
title_full_unstemmed	Horses show individual level lateralisation when inspecting an unfamiliar and unexpected stimulus.
title_sort	horses show individual level lateralisation when inspecting an unfamiliar and unexpected stimulus.
publisher	Public Library of Science (PLoS)
publishDate	2021
url	https://doaj.org/article/b03476f37b024cab99451a92668a0e6a
work_keys_str_mv	AT paolobaragli horsesshowindividuallevellateralisationwheninspectinganunfamiliarandunexpectedstimulus AT chiarascopa horsesshowindividuallevellateralisationwheninspectinganunfamiliarandunexpectedstimulus AT martinafelici horsesshowindividuallevellateralisationwheninspectinganunfamiliarandunexpectedstimulus AT adamrreddon horsesshowindividuallevellateralisationwheninspectinganunfamiliarandunexpectedstimulus
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Horses show individual level lateralisation when inspecting an unfamiliar and unexpected stimulus.

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