Anatomical and functional distribution of functional MRI language mapping

Area of Science:

• Neuroscience
• Neurology
• Epilepsy Research

Background:

• Accurate language cortex localization is crucial for neurosurgical planning.
• Electrical cortical stimulation (ECS) is a gold standard, but functional magnetic resonance imaging (fMRI) offers a non-invasive alternative.

Purpose of the Study:

• To compare language cortex localization using fMRI and ECS.
• To establish the clinical relevance of fMRI for language mapping.

Main Methods:

• Retrospective comparison of fMRI and ECS language mapping in 10 epilepsy patients.
• fMRI utilized a shiritori (word chain game) task for language activation.

Main Results:

• fMRI identified language areas (inferior frontal gyrus, superior temporal gyrus) and other activated regions.
• Activated areas included language cortices, negative motor areas, and supplementary motor areas (SMAs).

Conclusions:

• fMRI language mapping accurately identifies language-related areas and higher-order motor networks.
• fMRI findings suggest the involvement of motor networks in verbal expression, supporting its clinical utility.