Broca's cerebral asymmetry reflects gestural communication's lateralisation in monkeys (Papio anubis)
Manual gestures and speech recruit a common neural network, involving Broca’s area in the left hemisphere. Such speech-gesture integration gave rise to theories on the critical role of manual gesturing in the origin of language. Within this evolutionary framework, research on gestural communication...
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| Format: | Article |
| Language: | English |
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eLife Sciences Publications Ltd
2022-02-01
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| Series: | eLife |
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| Online Access: | https://elifesciences.org/articles/70521 |
| _version_ | 1811227521500315648 |
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| author | Yannick Becker Nicolas Claidière Konstantina Margiotoudi Damien Marie Muriel Roth Bruno Nazarian Jean-Luc Anton Olivier Coulon Adrien Meguerditchian |
| author_facet | Yannick Becker Nicolas Claidière Konstantina Margiotoudi Damien Marie Muriel Roth Bruno Nazarian Jean-Luc Anton Olivier Coulon Adrien Meguerditchian |
| author_sort | Yannick Becker |
| collection | DOAJ |
| description | Manual gestures and speech recruit a common neural network, involving Broca’s area in the left hemisphere. Such speech-gesture integration gave rise to theories on the critical role of manual gesturing in the origin of language. Within this evolutionary framework, research on gestural communication in our closer primate relatives has received renewed attention for investigating its potential language-like features. Here, using in vivo anatomical MRI in 50 baboons, we found that communicative gesturing is related to Broca homologue’s marker in monkeys, namely the ventral portion of the Inferior Arcuate sulcus (IA sulcus). In fact, both direction and degree of gestural communication’s handedness – but not handedness for object manipulation are associated and correlated with contralateral depth asymmetry at this exact IA sulcus portion. In other words, baboons that prefer to communicate with their right hand have a deeper left-than-right IA sulcus, than those preferring to communicate with their left hand and vice versa. Interestingly, in contrast to handedness for object manipulation, gestural communication’s lateralisation is not associated to the Central sulcus depth asymmetry, suggesting a double dissociation of handedness’ types between manipulative action and gestural communication. It is thus not excluded that this specific gestural lateralisation signature within the baboons’ frontal cortex might reflect a phylogenetical continuity with language-related Broca lateralisation in humans. |
| first_indexed | 2024-04-12T09:43:48Z |
| format | Article |
| id | doaj.art-eec69e490a8e48a9b7b8781838114226 |
| institution | Directory Open Access Journal |
| issn | 2050-084X |
| language | English |
| last_indexed | 2024-04-12T09:43:48Z |
| publishDate | 2022-02-01 |
| publisher | eLife Sciences Publications Ltd |
| record_format | Article |
| series | eLife |
| spelling | doaj.art-eec69e490a8e48a9b7b87818381142262022-12-22T03:38:01ZengeLife Sciences Publications LtdeLife2050-084X2022-02-011110.7554/eLife.70521Broca's cerebral asymmetry reflects gestural communication's lateralisation in monkeys (Papio anubis)Yannick Becker0https://orcid.org/0000-0002-9728-8316Nicolas Claidière1Konstantina Margiotoudi2https://orcid.org/0000-0002-9505-3978Damien Marie3Muriel Roth4Bruno Nazarian5Jean-Luc Anton6Olivier Coulon7Adrien Meguerditchian8https://orcid.org/0000-0003-3754-6747Laboratoire de Psychologie Cognitive, CNRS, Aix-Marseille University, Marseille, France; Centre IRMf Institut de Neurosciences de la Timone CNRS, Aix-Marseille University, Marseille, FranceLaboratoire de Psychologie Cognitive, CNRS, Aix-Marseille University, Marseille, FranceLaboratoire de Psychologie Cognitive, CNRS, Aix-Marseille University, Marseille, FranceLaboratoire de Psychologie Cognitive, CNRS, Aix-Marseille University, Marseille, FranceCentre IRMf Institut de Neurosciences de la Timone CNRS, Aix-Marseille University, Marseille, FranceCentre IRMf Institut de Neurosciences de la Timone CNRS, Aix-Marseille University, Marseille, FranceCentre IRMf Institut de Neurosciences de la Timone CNRS, Aix-Marseille University, Marseille, FranceInstitut de Neurosciences de la Timone CNRS, Aix-Marseille University, Marseille, FranceLaboratoire de Psychologie Cognitive, CNRS, Aix-Marseille University, Marseille, France; Station de Primatologie CNRS-CELPHEDIA, Marseille, FranceManual gestures and speech recruit a common neural network, involving Broca’s area in the left hemisphere. Such speech-gesture integration gave rise to theories on the critical role of manual gesturing in the origin of language. Within this evolutionary framework, research on gestural communication in our closer primate relatives has received renewed attention for investigating its potential language-like features. Here, using in vivo anatomical MRI in 50 baboons, we found that communicative gesturing is related to Broca homologue’s marker in monkeys, namely the ventral portion of the Inferior Arcuate sulcus (IA sulcus). In fact, both direction and degree of gestural communication’s handedness – but not handedness for object manipulation are associated and correlated with contralateral depth asymmetry at this exact IA sulcus portion. In other words, baboons that prefer to communicate with their right hand have a deeper left-than-right IA sulcus, than those preferring to communicate with their left hand and vice versa. Interestingly, in contrast to handedness for object manipulation, gestural communication’s lateralisation is not associated to the Central sulcus depth asymmetry, suggesting a double dissociation of handedness’ types between manipulative action and gestural communication. It is thus not excluded that this specific gestural lateralisation signature within the baboons’ frontal cortex might reflect a phylogenetical continuity with language-related Broca lateralisation in humans.https://elifesciences.org/articles/70521hemispheric specialisationgesturesnonhuman primateslanguage evolution |
| spellingShingle | Yannick Becker Nicolas Claidière Konstantina Margiotoudi Damien Marie Muriel Roth Bruno Nazarian Jean-Luc Anton Olivier Coulon Adrien Meguerditchian Broca's cerebral asymmetry reflects gestural communication's lateralisation in monkeys (Papio anubis) eLife hemispheric specialisation gestures nonhuman primates language evolution |
| title | Broca's cerebral asymmetry reflects gestural communication's lateralisation in monkeys (Papio anubis) |
| title_full | Broca's cerebral asymmetry reflects gestural communication's lateralisation in monkeys (Papio anubis) |
| title_fullStr | Broca's cerebral asymmetry reflects gestural communication's lateralisation in monkeys (Papio anubis) |
| title_full_unstemmed | Broca's cerebral asymmetry reflects gestural communication's lateralisation in monkeys (Papio anubis) |
| title_short | Broca's cerebral asymmetry reflects gestural communication's lateralisation in monkeys (Papio anubis) |
| title_sort | broca s cerebral asymmetry reflects gestural communication s lateralisation in monkeys papio anubis |
| topic | hemispheric specialisation gestures nonhuman primates language evolution |
| url | https://elifesciences.org/articles/70521 |
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