In Vivo Mapping of Fiber Pathways in the Rhesus Monkey Brain
Sabine Hofer*, 1, 2, Jens Frahm1
Identifiers and Pagination:Year: 2008
First Page: 32
Last Page: 41
Publisher Id: TOMIJ-2-32
Article History:Received Date: 11/2/2008
Revision Received Date: 11/3/2008
Acceptance Date: 12/3/2008
Electronic publication date: 3/4/2008
Collection year: 2008
open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
The study of complex fiber systems in relation to the cognitive abilities of humans is a long-standing challenge for neuroscientists. With the development of diffusion tensor imaging (DTI) it is now possible to visualize large fiber bundles non-invasively. The existing knowledge of the white matter architecture largely stems from either lesion studies of human patients or, in more detail, tracer injection studies of non-human primates. Hence, it seems mandatory to compare DTI results with histochemical findings obtained for the same species. Using a geometrically undistorted DTI technique and fiber tractography, we examined the fiber anatomy of the macaque brain in vivo and related the results to fiber pathways previously identified in monkeys with conventional tract tracing. The approach identified multiple fiber tracts including the main association and projection pathways as well as fibers of the limbic system, commissural system, optic system, and cerebellar system. In conclusion, in vivo fiber tractography based on current-state DTI allows for a comprehensive analysis of major fiber pathways in the intact macaque brain.