Targeting Symptom-Specific Networks With Transcranial Magnetic Stimulation

Area of Science:

• Neuroscience
• Neurology
• Psychiatry

Background:

• Clinical effects of transcranial magnetic stimulation (TMS) are increasingly recognized as target-dependent.
• Precise targeting of specific brain circuits may enhance clinical outcomes for various symptoms.

Purpose of the Study:

• To present a conceptual framework for identifying, testing, and implementing symptom-specific brain circuit targets for TMS.
• To explore the application of targeted TMS across different symptoms within a single disorder and across different disorders.

Main Methods:

• Review of existing evidence on TMS target specificity.
• Conceptual analysis of brain circuit targeting for symptom-specific effects.
• Discussion of potential applications in major depression and secondary depression.

Main Results:

• Evidence supports that TMS effects are dependent on the targeted brain circuits.
• Different circuits can modulate distinct symptoms, even within the same disorder (e.g., depression, anxiety).
• The same symptom (e.g., depression) can be targeted across different conditions (e.g., stroke, Parkinson's disease).

Conclusions:

• Symptom-specific targeting of brain circuits is a promising strategy to optimize TMS clinical outcomes.
• This approach allows for tailored interventions for diverse patient populations and symptom profiles.
• Further research is needed to refine the identification and implementation of these targeted TMS protocols.