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Original Paper

Sylvian Fissure Asymmetries in Nonhuman Primates Revisited: A Comparative MRI Study

Hopkins W.D.a, b · Pilcher D.L.a · MacGregor L.c

Author affiliations

aDivision of Psychobiology, Yerkes Regional Primate Research Center, Emory University, Atlanta, Ga.; Departments of Psychology, bBerry College, Rome, Ga.; cKennesaw State University, Kennesaw, Ga., USA

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Brain Behav Evol 2000;56:293–299

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Article / Publication Details

First-Page Preview
Abstract of Original Paper

Published online: April 13, 2001
Issue release date: December 2000

Number of Print Pages: 7
Number of Figures: 1
Number of Tables: 2

ISSN: 0006-8977 (Print)
eISSN: 1421-9743 (Online)

For additional information: https://www.karger.com/BBE

Abstract

Magnetic resonance images (MRI) were collected in a sample of 28 apes, 16 Old World monkeys and 8 New World monkeys. The length of the sylvian fissure (SF) and the superior temporal sulcus (STS) was traced in each hemisphere from three regions of the cerebral cortex. These three regions were labeled according to their position on the sagittal plane as lateral, medial and insular. It was hypothesized that the length and asymmetry of these fissures would be dependent on the region of measurement and that a leftward asymmetry in the SF and STS would be more robust in the great ape sample than for the monkeys. The results indicated within the ape sample a population-level leftward asymmetry in the medial and insular regions of the SF. Within the Old and New World monkey samples, the SF was leftward in the medial region at the population level, but not at the insular region. Additionally, the Old World monkeys exhibited a population-level rightward lateral SF and a rightward lateral STS. No other families exhibited population-level asymmetries in the lateral region of the SF or in any region of the STS. These results are consistent with findings reported in apes and, to a lesser extent, monkeys. MRI has excellent potential for comparing neuroanatomy across taxonomic families that will help future investigations.

© 2001 S. Karger AG, Basel


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Article / Publication Details

First-Page Preview
Abstract of Original Paper

Published online: April 13, 2001
Issue release date: December 2000

Number of Print Pages: 7
Number of Figures: 1
Number of Tables: 2

ISSN: 0006-8977 (Print)
eISSN: 1421-9743 (Online)

For additional information: https://www.karger.com/BBE


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