Regional difference in sulcal infolding progression correlated with cerebral cortical expansion in cynomolgus monkey fetuses.

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Regional difference in sulcal infolding progression correlated with cerebral cortical expansion in cynomolgus monkey fetuses.

Congenit Anom (Kyoto). 2017 Jan 21;:

Authors: Sawada K, Fukunishi K, Kashima M, Imai N, Saito S, Aoki I, Fukui Y

Abstract
The present study aimed to specify the cerebral sulci developed by cortical expansion in cynomolgus monkey fetuses. The degree of sulcal infolding was evaluated by the gyrification index (GI), which was quantified using ex vivo MRI. The correlation of cortical volume with the sulcal GI was most frequent during embryonic days (EDs) 100 to 120. Interestingly, the high correlation was marked during EDs 140 to 150 in restricted primary sulci in prefrontal, parietotemporal and medial temporal regions. The present results suggest that cortical expansion is involved in gyral demarcation by sulcal infolding, followed by the sulcal infolding progression in phylogenetically-newer cortices.

PMID: 28109019 [PubMed - as supplied by publisher]

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