Projections of Brodmann Area 6 to the Pyramidal Tract in Humans: Quantifications Using High Angular Resolution Data.
dorsal premotor area
high angular resolution diffusion imaging
human connectome project
pyramidal tract
supplementary motor area
Journal
Frontiers in neural circuits
ISSN: 1662-5110
Titre abrégé: Front Neural Circuits
Pays: Switzerland
ID NLM: 101477940
Informations de publication
Date de publication:
2019
2019
Historique:
received:
30
04
2019
accepted:
12
09
2019
entrez:
17
10
2019
pubmed:
17
10
2019
medline:
26
5
2020
Statut:
epublish
Résumé
Primate studies indicate that the pyramidal tract (PyT) could originate from Brodmann area (BA) 6. However, in humans, the accurate origin of PyT from BA 6 is still uncertain owing to difficulties in visualizing anatomical features such as the fanning shape at the corona radiata and multiple crossings at the semioval centrum. High angular-resolution diffusion imaging (HARDI) could reliably replicate these anatomical features. We explored the origin of the human PyT from BA 6 using HARDI. With HARDI data of 30 adults from the Massachusetts General Hospital-Human Connectome Project (MGH-HCP) database and the HCP 1021 template (average of 1021 HCP diffusion data), we visualized the PyT at the 30-averaged group level and the 1021 large-sample level and validated the observations in each of the individuals. Endpoints of the fibers within each subregion were quantified. PyT fibers originating from the BA 6 were consistently visualized in all images. Specifically, the bilateral supplementary motor area (SMA) and dorsal premotor area (dPMA) were consistently found to contribute to the PyT. PyT fibers from BA 6 and those from BA 4 exhibited a twisting topology. The PyT contains fibers originating from the SMA and dPMA in BA 6. Infarction of these regions or aging would result in incomplete provision of information to the PyT and concomitant decreases in motor planning and coordination abilities.
Identifiants
pubmed: 31616257
doi: 10.3389/fncir.2019.00062
pmc: PMC6775280
doi:
Types de publication
Journal Article
Research Support, N.I.H., Extramural
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
62Subventions
Organisme : NIMH NIH HHS
ID : U01 MH093765
Pays : United States
Organisme : NCRR NIH HHS
ID : S10 RR019307
Pays : United States
Organisme : NCRR NIH HHS
ID : S10 RR023043
Pays : United States
Organisme : NIBIB NIH HHS
ID : P41 EB015896
Pays : United States
Organisme : NCRR NIH HHS
ID : S10 RR023401
Pays : United States
Informations de copyright
Copyright © 2019 Wang, Shan, Zhang, Wei, Li, Yin and Lu.
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