MR diffusion tensor imaging: a window into white matter integrity of the working brain

Area of Science:

• Neuroscience
• Medical Imaging
• Neurology

Background:

• Norman Geschwind's 1965 hypothesis proposed that white matter lesions and disrupted connections (disconnections) significantly impact higher-order brain functions.
• Historically, the precise impact of white matter integrity on cognitive deficits has been challenging to quantify in vivo.

Purpose of the Study:

• To provide an overview of diffusion tensor imaging (DTI) principles.
• To highlight DTI's contribution to understanding normal and pathological brain function.
• To reinforce Geschwind's theories on white matter lesions and cognitive function.

Main Methods:

• Diffusion Tensor Imaging (DTI) allows for quantitative assessment of white matter microstructure.
• In vivo imaging techniques enable the study of white matter integrity in living subjects.

Main Results:

• DTI provides quantitative data on white matter fiber integrity.
• This imaging modality strengthens the understanding of how white matter damage affects brain function.

Conclusions:

• DTI is a powerful tool for investigating the role of white matter in neurological health and disease.
• The findings support the critical link between white matter integrity and higher-order cognitive abilities.