UNIGE document Scientific Article
previous document  unige:93637  next document
add to browser collection
Title

Left Brain Asymmetry of the Planum Temporale in a Nonhominid Primate: Redefining the Origin of Brain Specialization for Language

Authors
Roth, Muriel
Lacoste, Romain
Nazarian, Bruno
Bertello, Alice
Anton, Jean-Luc
Hopkins, William D.
Margiotoudi, Konstantina
show hidden authors show all authors [1 - 10]
Published in Cerebral Cortex. 2017, vol. 1, no. 8
Abstract The planum temporale (PT) is a critical region of the language functional network in the human brain showing a striking size asymmetry toward the left hemisphere. Historically considered as a structural landmark of the left-brain specialization for language, a similar anatomical bias has been described in great apes but never in monkeys—indicating that this brain landmark might be unique to Hominidae evolution. In the present in vivo magnetic resonance imaging study, we show clearly for the first time in a nonhominid primate species, an Old World monkey, a left size predominance of the PT among 96 olive baboons (Papio anubis), using manual delineation of this region in each individual hemisphere. This asymmetric distribution was quasi-identical to that found originally in humans. Such a finding questions the relationship between PT asymmetry and the emergence of language, indicating that the origin of this cerebral specialization could be much older than previously thought, dating back, not to the Hominidae, but rather to the Catarrhini evolution at the common ancestor of humans, great apes and Old World monkeys, 30–40 million years ago.
Keywords BaboonsBrain evolutionHemispheric specializationMRI
Identifiers
Full text
Structures
Research groups Brain and Language Lab (926)
Laboratoire de Psychologie Cognitive
Project ANR-12-PDOC-0014-01, LangPrimate Project, P.I. Adrien Meguerditchian
Citation
(ISO format)
MARIE, Damien et al. Left Brain Asymmetry of the Planum Temporale in a Nonhominid Primate: Redefining the Origin of Brain Specialization for Language. In: Cerebral Cortex, 2017, vol. 1, n° 8. https://archive-ouverte.unige.ch/unige:93637

25 hits

55 downloads

Update

Deposited on : 2017-04-20

Export document
Format :
Citation style :