Using 3D-MRI to localize the dorsolateral prefrontal cortex in TMS research

Area of Science:

• Neuroscience
• Medical Imaging
• Psychiatry

Background:

• Transcranial magnetic stimulation (TMS) is a non-invasive treatment for depression.
• Current TMS protocols often use a standard procedure for targeting the left dorsolateral prefrontal cortex (DLPFC).
• This standard procedure relies on a fixed position relative to the motor cortex.

Purpose of the Study:

• To evaluate the relevance of using individual anatomical data for TMS coil positioning.
• To compare an individualized localization method using 3D-MRI with the standard procedure.
• To examine the intra-individual variability in stimulation area localization.

Main Methods:

• Utilized a more individualized coil positioning method based on three-dimensional magnetic resonance imaging (3D-MRI) of the head.
• Compared the anatomical localization derived from 3D-MRI with the standard procedure.
• Conducted the study on a gender-controlled sample.

Main Results:

• The study found significant differences between the anatomical localization (3D-MRI) and the standard procedure for targeting the prefrontal cortex.
• These differences in localization varied within subjects, even in a gender-controlled sample.
• The results highlight intra-individual variability when using the standard procedure.

Conclusions:

• The findings confirm the need for TMS coil positioning methods that incorporate individual anatomical information.
• Individualized targeting based on 3D-MRI may enhance the precision and efficacy of TMS treatment for depression.
• Personalized neurostimulation approaches are crucial for optimizing treatment outcomes.