Broca's cerebral asymmetry reflects gestural communication's lateralisation in monkeys (Papio anubis).

ABSTRACT: 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 dep

SUBMITTER: Becker Y 

PROVIDER: S-EPMC8846582 | biostudies-literature | 2022 Feb

REPOSITORIES: biostudies-literature