Corpus callosum morphology across the lifespan in baboons (Papio anubis): A cross-sectional study of relative mid-sagittal surface area and thickness - Aix-Marseille Université Access content directly
Journal Articles Neuroscience Research Year : 2021

Corpus callosum morphology across the lifespan in baboons (Papio anubis): A cross-sectional study of relative mid-sagittal surface area and thickness

Abstract

The corpus callosum enables integration and coordination of cognitive processing between the cerebral hemispheres. In the aging human brain, these functions are affected by progressive axon and myelin deteriorations, reflected as atrophy of the midsagittal corpus callosum in old age. In non-human primates, these degenerative processes are less pronounced as previous morphometric studies on capuchin monkey, rhesus monkeys, and chimpanzees do not find old-age callosal atrophy. In the present study, we extend these previous findings by studying callosal development of the olive baboon (Papio anubis) across the lifespan and compare it to chimpanzee and human data. For this purpose, total relative (to forebrain volume) midsagittal area, subsectional area, and regional thickness of the corpus callosum were assessed in 91 male and female baboons using non-invasive MRI-based morphometry. The studied age range was 2.5–26.6 years and lifespan trajectories were fitted using general additive modelling. Relative area of the total and anterior corpus callosum showed a positive linear trajectory. That is, both measures increased slowly but continuously from childhood into old age, and no decline was observed in old age. Thus, comparable with all other non-human primates studied to-date, baboons do not show callosal atrophy in old age. This observation lends supports to the notion that atrophy of the corpus callosum is a unique characteristic of human brain aging.
Fichier principal
Vignette du fichier
2021_Westerhausen_Meguerditchian_Neurosci.Res (1).pdf (1.13 Mo) Télécharger le fichier

Dates and versions

hal-03196956 , version 1 (13-04-2021)

Licence

Attribution - NonCommercial - NoDerivatives

Identifiers

Cite

René Westerhausen, Adrien Meguerditchian. Corpus callosum morphology across the lifespan in baboons (Papio anubis): A cross-sectional study of relative mid-sagittal surface area and thickness. Neuroscience Research, 2021, ⟨10.1016/j.neures.2021.03.002⟩. ⟨hal-03196956⟩
37 View
119 Download

Altmetric

Share

Gmail Facebook X LinkedIn More