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Rat 50 kHz Trill Calls Are Tied to the Expectation of Social Interaction

Rats emit a variety of calls in the 40–80 kHz range (50 kHz calls). While these calls are generally associated with positive affect, it is unclear whether certain calls might be used selectively in certain contexts. To examine this, we looked at ultrasonic calls in 30–40 day old male rats during the...

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Autores principales: Burke, Candace J., Markovina, Mariya, Pellis, Sergio M., Euston, David R.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8468548/
https://www.ncbi.nlm.nih.gov/pubmed/34573164
http://dx.doi.org/10.3390/brainsci11091142
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author Burke, Candace J.
Markovina, Mariya
Pellis, Sergio M.
Euston, David R.
author_facet Burke, Candace J.
Markovina, Mariya
Pellis, Sergio M.
Euston, David R.
author_sort Burke, Candace J.
collection PubMed
description Rats emit a variety of calls in the 40–80 kHz range (50 kHz calls). While these calls are generally associated with positive affect, it is unclear whether certain calls might be used selectively in certain contexts. To examine this, we looked at ultrasonic calls in 30–40 day old male rats during the expectation of either play or food, both of which are reinforcing. Behavior and vocalizations were recorded while rats were in a test chamber awaiting the arrival of a play partner or food over seven days of testing. Control groups were included for the non-specific effects of food deprivation and social isolation. Play reward led to an increase in 50 kHz vocalizations, generally, with specific increases in trill and “trill with jump” calls not seen in other groups. Expectation of food reward did not lead to a significant increase in vocalizations of any type, perhaps due to the young age of our study group. Further, rats that were food deprived for the food expectation study showed markedly lower calls overall and had a different profile of call types compared to rats that were socially isolated. Taken together, the results suggest that trill-associated calls may be used selectively when rats are socially isolated and/or expecting a social encounter.
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spelling pubmed-84685482021-09-27 Rat 50 kHz Trill Calls Are Tied to the Expectation of Social Interaction Burke, Candace J. Markovina, Mariya Pellis, Sergio M. Euston, David R. Brain Sci Article Rats emit a variety of calls in the 40–80 kHz range (50 kHz calls). While these calls are generally associated with positive affect, it is unclear whether certain calls might be used selectively in certain contexts. To examine this, we looked at ultrasonic calls in 30–40 day old male rats during the expectation of either play or food, both of which are reinforcing. Behavior and vocalizations were recorded while rats were in a test chamber awaiting the arrival of a play partner or food over seven days of testing. Control groups were included for the non-specific effects of food deprivation and social isolation. Play reward led to an increase in 50 kHz vocalizations, generally, with specific increases in trill and “trill with jump” calls not seen in other groups. Expectation of food reward did not lead to a significant increase in vocalizations of any type, perhaps due to the young age of our study group. Further, rats that were food deprived for the food expectation study showed markedly lower calls overall and had a different profile of call types compared to rats that were socially isolated. Taken together, the results suggest that trill-associated calls may be used selectively when rats are socially isolated and/or expecting a social encounter. MDPI 2021-08-28 /pmc/articles/PMC8468548/ /pubmed/34573164 http://dx.doi.org/10.3390/brainsci11091142 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Burke, Candace J.
Markovina, Mariya
Pellis, Sergio M.
Euston, David R.
Rat 50 kHz Trill Calls Are Tied to the Expectation of Social Interaction
title Rat 50 kHz Trill Calls Are Tied to the Expectation of Social Interaction
title_full Rat 50 kHz Trill Calls Are Tied to the Expectation of Social Interaction
title_fullStr Rat 50 kHz Trill Calls Are Tied to the Expectation of Social Interaction
title_full_unstemmed Rat 50 kHz Trill Calls Are Tied to the Expectation of Social Interaction
title_short Rat 50 kHz Trill Calls Are Tied to the Expectation of Social Interaction
title_sort rat 50 khz trill calls are tied to the expectation of social interaction
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8468548/
https://www.ncbi.nlm.nih.gov/pubmed/34573164
http://dx.doi.org/10.3390/brainsci11091142
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