NDLI: Cortico-Cortical, Cortico-Striatal, and Cortico-Thalamic White Matter Fiber Tracts Generated in the Macaque Brain via Dynamic Programming

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Cortico-Cortical, Cortico-Striatal, and Cortico-Thalamic White Matter Fiber Tracts Generated in the Macaque Brain via Dynamic Programming

Content Provider	PubMed Central
Author	Tilak, Ratnanather J. Lal, Rakesh M. An, Michael Poynton, Clare B. Li, Muwei Jiang, Hangyi Oishi, Kenichi Selemon, Lynn D. Mori, Susumu Miller, Michael I.
Copyright Year	2013
Abstract	Probabilistic methods have the potential to generate multiple and complex white matter fiber tracts in diffusion tensor imaging (DTI). Here, a method based on dynamic programming (DP) is introduced to reconstruct fibers pathways whose complex anatomical structures cannot be resolved beyond the resolution of standard DTI data. DP is based on optimizing a sequentially additive cost function derived from a Gaussian diffusion model whose covariance is defined by the diffusion tensor. DP is used to determine the optimal path between initial and terminal nodes by efficiently searching over all paths, connecting the nodes, and choosing the path in which the total probability is maximized. An ex vivo high-resolution scan of a macaque hemi-brain is used to demonstrate the advantages and limitations of DP. DP can generate fiber bundles between distant cortical areas (superior longitudinal fasciculi, arcuate fasciculus, uncinate fasciculus, and fronto-occipital fasciculus), neighboring cortical areas (dorsal and ventral banks of the principal sulcus), as well as cortical projections to the hippocampal formation (cingulum bundle), neostriatum (motor cortical projections to the putamen), thalamus (subcortical bundle), and hippocampal formation projections to the mammillary bodies via the fornix. Validation is established either by comparison with in vivo intracellular transport of horseradish peroxidase in another macaque monkey or by comparison with atlases. DP is able to generate known pathways, including crossing and kissing tracts. Thus, DP has the potential to enhance neuroimaging studies of cortical connectivity.
Related Links	http://dx.doi.org/10.1089/brain.2013.0143
Ending Page	490
Page Count	16
Starting Page	475
File Format	PDF
ISSN	21580014
e-ISSN	21580022
Journal	Brain Connectivity
Issue Number	5
Volume Number	3
Language	English
Publisher	Mary Ann Liebert, Inc.
Publisher Date	2013-10-01
Access Restriction	Open
Rights Holder	Mary Ann Liebert, Inc.
Subject Keyword	Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Neuroscience

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