A Rapid fMRI Paradigm for Localisation of the Language Network

Area of Science:

• Neuroimaging
• Cognitive Neuroscience
• Neurosurgery

Background:

• Assessing language networks with imaging is challenging due to neural complexity.
• Structural imaging alone is insufficient for mapping language areas in brain tumor patients.
• Functional magnetic resonance imaging (fMRI) offers a non-invasive approach for localizing language dominance.

Purpose of the Study:

• To present a rapid, four-task fMRI paradigm for determining an individual's specific language network.
• To evaluate the feasibility and time efficiency of this fMRI approach.

Main Methods:

• Prospective recruitment of fifteen participants.
• A 10-minute pre-scan preparation followed by four tasks: covert naming, overt naming, sentence completion, and the Pyramids and Palm Trees Test (PPTT).
• Generation of subject-specific, task-based fMRI maps.

Main Results:

• All four tasks were completed within 30 minutes for most participants (average 25.9 ± 1.8 min).
• Subject-specific fMRI maps provided insights into the bilaterally represented language network.
• The rapid paradigm generated maximal information for potential intraoperative use.

Conclusions:

• The four-task fMRI paradigm is a time-efficient method for mapping individual language networks.
• This approach can provide valuable information for intraoperative testing during awake surgeries.
• Further research is needed to assess limitations in patients with neurological deficits or lesions.