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Diffusion Tensor Magnetic Resonance Imaging in the Analysis of Neurodegenerative Diseases

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Transcranial Magnetic Stimulation and Diffusion Tensor Tractography for Evaluating Ambulation after Stroke.

Bo-Ram Kim¹, Won-Jin Moon², Hyuntae Kim¹

¹Department of Rehabilitation Medicine, Konkuk University School of Medicine and Konkuk University Medical Center, Seoul, Korea.

Journal of Stroke

|June 11, 2016

Summary

Combining transcranial magnetic stimulation (TMS) and diffusion tensor tractography (DTT) effectively predicts motor recovery and ambulatory function in middle cerebral artery (MCA) stroke patients by assessing corticospinal tract (CST) integrity.

Keywords:

Corticospinal tract Locomotion Rehabilitation Stroke

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Measuring and Manipulating Functionally Specific Neural Pathways in the Human Motor System with Transcranial Magnetic Stimulation

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Published on: February 23, 2020

Area of Science:

Neuroscience
Neurology
Rehabilitation Medicine

Background:

Stroke, particularly from middle cerebral artery (MCA) occlusion, frequently results in motor deficits.
Assessing the integrity of the corticospinal tract (CST) is crucial for predicting motor function recovery.
Non-invasive neuroimaging and stimulation techniques offer potential for evaluating CST integrity.

Purpose of the Study:

To evaluate the combined utility of transcranial magnetic stimulation (TMS) and diffusion tensor tractography (DTT) for assessing corticospinal tract (CST) integrity.
To determine if this combined approach can predict ambulatory function and motor recovery post-MCA stroke.

Main Methods:

Forty-three patients with MCA stroke underwent TMS and DTT to assess CST integrity.
Patients were grouped based on motor-evoked potentials (MEPs) and CST integrity.
Motor impairment and functional status were evaluated using standardized scales at admission and 4 weeks.

Main Results:

Patients with both MEPs and intact CSTs demonstrated superior motor recovery and ambulatory function at 4 weeks.
Absence of detectable MEPs correlated with non-visualized intact CSTs.
Among patients with MEPs, preserved CST integrity predicted better recovery of paretic lower extremities.

Conclusions:

The combination of TMS and DTT provides a valuable tool for assessing CST integrity.
This integrated method offers significant advantages in predicting motor and ambulation recovery in MCA stroke patients.