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Novel 31-kHz calls emitted by female Lewis rats during social isolation and social inequality conditions

Whether commonly used experimental animals show aversion toward inequality of social rewards, as humans do remains unknown. We examined whether rats emitted the 22-kHz distress calls under social reward inequality. Rats showed affiliative behavior for a specific human who repeatedly stroked and tick...

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Detalles Bibliográficos
Autores principales: Okabe, Shota, Takayanagi, Yuki, Yoshida, Masahide, Onaka, Tatsushi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Elsevier 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10009291/
https://www.ncbi.nlm.nih.gov/pubmed/36923001
http://dx.doi.org/10.1016/j.isci.2023.106243
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author Okabe, Shota
Takayanagi, Yuki
Yoshida, Masahide
Onaka, Tatsushi
author_facet Okabe, Shota
Takayanagi, Yuki
Yoshida, Masahide
Onaka, Tatsushi
author_sort Okabe, Shota
collection PubMed
description Whether commonly used experimental animals show aversion toward inequality of social rewards, as humans do remains unknown. We examined whether rats emitted the 22-kHz distress calls under social reward inequality. Rats showed affiliative behavior for a specific human who repeatedly stroked and tickled them. When experimenter stroked another rat in front of them and during social isolation, these rats emitted novel calls with acoustic characteristics different from those of calls emitted under physical stress, namely air-puff. Under inequality conditions, rats emitted calls with higher frequency (∼31 kHz) and shorter duration (<0.5 s) than those emitted when receiving air-puff. However, with an affiliative human in front of them, the number of novel calls was lower and rats emitted 50-kHz calls, indicative of the appetitive state. These results indicate that rats distinguish between conditions of social reward inequality and the presence of an experimenter, and emit novel 31-kHz calls.
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spelling pubmed-100092912023-03-14 Novel 31-kHz calls emitted by female Lewis rats during social isolation and social inequality conditions Okabe, Shota Takayanagi, Yuki Yoshida, Masahide Onaka, Tatsushi iScience Article Whether commonly used experimental animals show aversion toward inequality of social rewards, as humans do remains unknown. We examined whether rats emitted the 22-kHz distress calls under social reward inequality. Rats showed affiliative behavior for a specific human who repeatedly stroked and tickled them. When experimenter stroked another rat in front of them and during social isolation, these rats emitted novel calls with acoustic characteristics different from those of calls emitted under physical stress, namely air-puff. Under inequality conditions, rats emitted calls with higher frequency (∼31 kHz) and shorter duration (<0.5 s) than those emitted when receiving air-puff. However, with an affiliative human in front of them, the number of novel calls was lower and rats emitted 50-kHz calls, indicative of the appetitive state. These results indicate that rats distinguish between conditions of social reward inequality and the presence of an experimenter, and emit novel 31-kHz calls. Elsevier 2023-02-20 /pmc/articles/PMC10009291/ /pubmed/36923001 http://dx.doi.org/10.1016/j.isci.2023.106243 Text en © 2023 The Author(s) https://creativecommons.org/licenses/by/4.0/This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Okabe, Shota
Takayanagi, Yuki
Yoshida, Masahide
Onaka, Tatsushi
Novel 31-kHz calls emitted by female Lewis rats during social isolation and social inequality conditions
title Novel 31-kHz calls emitted by female Lewis rats during social isolation and social inequality conditions
title_full Novel 31-kHz calls emitted by female Lewis rats during social isolation and social inequality conditions
title_fullStr Novel 31-kHz calls emitted by female Lewis rats during social isolation and social inequality conditions
title_full_unstemmed Novel 31-kHz calls emitted by female Lewis rats during social isolation and social inequality conditions
title_short Novel 31-kHz calls emitted by female Lewis rats during social isolation and social inequality conditions
title_sort novel 31-khz calls emitted by female lewis rats during social isolation and social inequality conditions
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10009291/
https://www.ncbi.nlm.nih.gov/pubmed/36923001
http://dx.doi.org/10.1016/j.isci.2023.106243
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