Sulcal organization in the medial frontal cortex provides insights into primate brain evolution

Céline Amiez (), Jérôme Sallet, William D. Hopkins, Adrien Meguerditchian, Fadila Hadj-Bouziane, Suliann Hamed, Charles R. E. Wilson, Emmanuel Procyk and Michael Petrides
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Céline Amiez: Stem Cell and Brain Research Institute U1208
Jérôme Sallet: University of Oxford
William D. Hopkins: University of Texas MD Anderson Cancer Center
Adrien Meguerditchian: Université Aix-Marseille, CNRS
Fadila Hadj-Bouziane: University of Lyon 1
Suliann Hamed: CNRS-Université Claude Bernard Lyon I
Charles R. E. Wilson: Stem Cell and Brain Research Institute U1208
Emmanuel Procyk: Stem Cell and Brain Research Institute U1208
Michael Petrides: McGill University

Nature Communications, 2019, vol. 10, issue 1, 1-14

Abstract: Abstract Although the relative expansion of the frontal cortex in primate evolution is generally accepted, the nature of the human uniqueness, if any, and between-species anatomo-functional comparisons of the frontal areas remain controversial. To provide a novel interpretation of the evolution of primate brains, sulcal morphological variability of the medial frontal cortex was assessed in Old World monkeys (macaque/baboon) and Hominoidea (chimpanzee/human). We show that both Hominoidea possess a paracingulate sulcus, which was previously thought to be unique to the human brain and linked to higher cognitive functions, such as mentalizing. Also, we show systematic sulcal morphological organization of the medial frontal cortex that can be traced from Old World monkeys to Hominoidea species, demonstrating an evolutionarily conserved organizational principle. These data provide a new framework to compare sulcal morphology, cytoarchitectonic areal distribution, connectivity, and function across the primate order, leading to clear predictions about how other primate brains might be anatomo-functionally organized.

Date: 2019
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DOI: 10.1038/s41467-019-11347-x

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