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Erschienen in: Surgical and Radiologic Anatomy 2/2014

01.03.2014 | Original Article

Connectivity within the primary motor cortex: a DTI tractography study

verfasst von: Elsa Magro, Tristan Moreau, Romuald Seizeur, Ilyess Zemmoura, Bernard Gibaud, Xavier Morandi

Erschienen in: Surgical and Radiologic Anatomy | Ausgabe 2/2014

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Abstract

Purpose

Because of the motor function of the precentral area, the connections of the primary motor cortex by white matter fiber bundles have been widely studied in diffusion tensor imaging (DTI). Nevertheless, the connections within the primary motor cortex have yet to be explored. We have studied the connectivity between the different regions of the precentral gyrus in a population of subjects.

Methods

Based on T1 magnetic resonance imaging (MRI) and on individual sulco-gyral anatomy, we defined a parcellation of the right and the left precentral gyri in 20 healthy subjects (10 right-handers; 10 left-handers). This parcellation gave us the opportunity to study MRI tracks reconstructed by tractography within the precentral gyrus and to compare these connections across subjects. We also performed a classical dissection of post-mortem brain tissue to isolate this pattern of connectivity.

Results

We showed MRI tracks connecting the different parts of the same precentral gyrus. This result was reproducible and was found in the left and right hemispheres of the 20 subjects. A quantitative description of the bilateral distribution of the MRI tracks was performed, based on statistical analysis and asymmetry indices, to compare asymmetry and handedness.

Conclusions

To the best of our knowledge, this pattern of connectivity has never before been detailed in the literature. Its functional meaning remains to be determined, which requires further study.
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Metadaten
Titel
Connectivity within the primary motor cortex: a DTI tractography study
verfasst von
Elsa Magro
Tristan Moreau
Romuald Seizeur
Ilyess Zemmoura
Bernard Gibaud
Xavier Morandi
Publikationsdatum
01.03.2014
Verlag
Springer Paris
Erschienen in
Surgical and Radiologic Anatomy / Ausgabe 2/2014
Print ISSN: 0930-1038
Elektronische ISSN: 1279-8517
DOI
https://doi.org/10.1007/s00276-013-1160-y

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