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Related Experiment Video

Updated: Jul 4, 2026

Co-analysis of Brain Structure and Function using fMRI and Diffusion-weighted Imaging

Co-analysis of Brain Structure and Function using fMRI and Diffusion-weighted Imaging

Published on: November 8, 2012

Cortical reorganization demonstrated by diffusion tensor tractography analyzed using functional MRI activation.

Bong Soo Han¹, Sang Ho Ahn, Sung Ho Jang

¹Department of Radiation Science, Yonsei University College of Health Science, Kangwon-do, Republic of Korea.

Neurorehabilitation

|June 6, 2008

Summary

This summary is machine-generated.

Diffusion tensor tractography (DTT) combined with functional MRI (fMRI) visualizes corticospinal tract (CST) reorganization after brain injury. This technique revealed motor function remapping in a patient with a frontal lobe hemorrhage.

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Area of Science:

Neuroimaging
Neuroscience
Radiology

Background:

The corticospinal tract (CST) is crucial for voluntary motor control.
Assessing CST integrity and plasticity after brain injury is clinically significant.
Diffusion tensor tractography (DTT) visualizes white matter tracts, while functional MRI (fMRI) maps brain activity.

Observation:

This study investigated the combined use of DTT and fMRI to evaluate subcortical and cortical aspects of the CST.
A 12-year-old patient with a left fronto-parietal hemorrhage and six healthy controls participated.
fMRI identified cortical activation sites, and DTT reconstructed the CST using these sites as seed regions.

Findings:

The CST in the affected hemisphere originated from an unusual lateral area of the injured precentral gyrus.
This pathway followed the typical CST course down to the anterior pons.
The findings suggest a reorganization of motor function into the injured precentral gyrus's lateral area.

Implications:

Combined DTT/fMRI offers a powerful method for assessing CST status and cortical reorganization.
This approach can elucidate the functional state of the CST in patients with neurological injuries.
Understanding neuroplasticity in the CST is vital for developing rehabilitation strategies.