Abstract:
:The "language-ready" brain theory suggests that the infant brain is pre-wired for language acquisition prior to language exposure. As a potential brain marker of such a language readiness, a leftward structural brain asymmetry was found in human infants for the Planum Temporale (PT), which overlaps with Wernicke's area. In the present longitudinal in vivo MRI study conducted in 35 newborn monkeys (Papio anubis), we found a similar leftward PT surface asymmetry. Follow-up rescanning sessions on 29 juvenile baboons at 7-10 months showed that such an asymmetry increases across the two ages classes. These original findings in non-linguistic primate infants strongly question the idea that the early PT asymmetry constitutes a human infant-specific marker for language development. Such a shared early perisylvian organization provides additional support that PT asymmetry might be related to a lateralized system inherited from our last common ancestor with Old-World monkeys at least 25-35 million years ago.
journal_name
Neuroimagejournal_title
NeuroImageauthors
Becker Y,Sein J,Velly L,Giacomino L,Renaud L,Lacoste R,Anton JL,Nazarian B,Berne C,Meguerditchian Adoi
10.1016/j.neuroimage.2020.117575subject
Has Abstractpub_date
2020-12-04 00:00:00pages
117575eissn
1053-8119issn
1095-9572pii
S1053-8119(20)31060-0journal_volume
227pub_type
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