Left hemisphere specialization for oro-facial movements of learned vocal signals by captive chimpanzees.

<h4>Background</h4>The left hemisphere of the human brain is dominant in the production of speech and signed language. Whether similar lateralization of function for communicative signal production is present in other primates remains a topic of considerable debate. In the current study,...

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Autores principales:	Elizabeth A Reynolds Losin, Jamie L Russell, Hani Freeman, Adrien Meguerditchian, William D Hopkins
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2008
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/f4d2758c6eb74e7a93ab760fd4789cd1
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spelling	oai:doaj.org-article:f4d2758c6eb74e7a93ab760fd4789cd12021-11-25T06:11:53ZLeft hemisphere specialization for oro-facial movements of learned vocal signals by captive chimpanzees.1932-620310.1371/journal.pone.0002529https://doaj.org/article/f4d2758c6eb74e7a93ab760fd4789cd12008-06-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/18575610/?tool=EBIhttps://doaj.org/toc/1932-6203<h4>Background</h4>The left hemisphere of the human brain is dominant in the production of speech and signed language. Whether similar lateralization of function for communicative signal production is present in other primates remains a topic of considerable debate. In the current study, we examined whether oro-facial movements associated with the production of learned attention-getting sounds are differentially lateralized compared to facial expressions associated with the production of species-typical emotional vocalizations in chimpanzees.<h4>Methodology/principal findings</h4>Still images captured from digital video were used to quantify oro-facial asymmetries in the production of two attention-getting sounds and two species-typical vocalizations in a sample of captive chimpanzees. Comparisons of mouth asymmetries during production of these sounds revealed significant rightward biased asymmetries for the attention-getting sounds and significant leftward biased asymmetries for the species-typical sounds.<h4>Conclusions/significance</h4>These results suggest that the motor control of oro-facial movements associated with the production of learned sounds is lateralized to the left hemisphere in chimpanzees. Furthermore, the findings suggest that the antecedents for lateralization of human speech may have been present in the common ancestor of chimpanzees and humans approximately 5 mya and are not unique to the human lineage.Elizabeth A Reynolds LosinJamie L RussellHani FreemanAdrien MeguerditchianWilliam D HopkinsPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 3, Iss 6, p e2529 (2008)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Elizabeth A Reynolds Losin Jamie L Russell Hani Freeman Adrien Meguerditchian William D Hopkins Left hemisphere specialization for oro-facial movements of learned vocal signals by captive chimpanzees.
description	<h4>Background</h4>The left hemisphere of the human brain is dominant in the production of speech and signed language. Whether similar lateralization of function for communicative signal production is present in other primates remains a topic of considerable debate. In the current study, we examined whether oro-facial movements associated with the production of learned attention-getting sounds are differentially lateralized compared to facial expressions associated with the production of species-typical emotional vocalizations in chimpanzees.<h4>Methodology/principal findings</h4>Still images captured from digital video were used to quantify oro-facial asymmetries in the production of two attention-getting sounds and two species-typical vocalizations in a sample of captive chimpanzees. Comparisons of mouth asymmetries during production of these sounds revealed significant rightward biased asymmetries for the attention-getting sounds and significant leftward biased asymmetries for the species-typical sounds.<h4>Conclusions/significance</h4>These results suggest that the motor control of oro-facial movements associated with the production of learned sounds is lateralized to the left hemisphere in chimpanzees. Furthermore, the findings suggest that the antecedents for lateralization of human speech may have been present in the common ancestor of chimpanzees and humans approximately 5 mya and are not unique to the human lineage.
format	article
author	Elizabeth A Reynolds Losin Jamie L Russell Hani Freeman Adrien Meguerditchian William D Hopkins
author_facet	Elizabeth A Reynolds Losin Jamie L Russell Hani Freeman Adrien Meguerditchian William D Hopkins
author_sort	Elizabeth A Reynolds Losin
title	Left hemisphere specialization for oro-facial movements of learned vocal signals by captive chimpanzees.
title_short	Left hemisphere specialization for oro-facial movements of learned vocal signals by captive chimpanzees.
title_full	Left hemisphere specialization for oro-facial movements of learned vocal signals by captive chimpanzees.
title_fullStr	Left hemisphere specialization for oro-facial movements of learned vocal signals by captive chimpanzees.
title_full_unstemmed	Left hemisphere specialization for oro-facial movements of learned vocal signals by captive chimpanzees.
title_sort	left hemisphere specialization for oro-facial movements of learned vocal signals by captive chimpanzees.
publisher	Public Library of Science (PLoS)
publishDate	2008
url	https://doaj.org/article/f4d2758c6eb74e7a93ab760fd4789cd1
work_keys_str_mv	AT elizabethareynoldslosin lefthemispherespecializationfororofacialmovementsoflearnedvocalsignalsbycaptivechimpanzees AT jamielrussell lefthemispherespecializationfororofacialmovementsoflearnedvocalsignalsbycaptivechimpanzees AT hanifreeman lefthemispherespecializationfororofacialmovementsoflearnedvocalsignalsbycaptivechimpanzees AT adrienmeguerditchian lefthemispherespecializationfororofacialmovementsoflearnedvocalsignalsbycaptivechimpanzees AT williamdhopkins lefthemispherespecializationfororofacialmovementsoflearnedvocalsignalsbycaptivechimpanzees
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Left hemisphere specialization for oro-facial movements of learned vocal signals by captive chimpanzees.

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