Contextual Engagement to Enhance Effective Transcranial Direct Current Stimulation: A Theoretical and Mechanistic...

Area of Science:

• Neuroscience
• Neuromodulation
• Clinical Psychiatry

Background:

• Transcranial direct current stimulation (tDCS) is an FDA-approved noninvasive brain stimulation for major depressive disorder.
• Current tDCS efficacy shows modest effect sizes, necessitating strategies for improvement.
• tDCS effects are state-dependent, influenced by concurrent cognitive, emotional, or behavioral engagement.

Purpose of the Study:

• To explore the theoretical rationale for integrating therapeutic engagement with tDCS.
• To highlight the importance of contextual factors in modulating tDCS outcomes.
• To underscore the need for longer follow-up studies to assess tDCS efficacy.

Main Methods:

• Review of mechanistic insights into state-dependent neuromodulation.
• Theoretical outlining of integrating therapeutic engagement with tDCS protocols.
• Case illustration of tDCS combined with virtual reality for therapeutic context.

Main Results:

• Concurrent engagement can modulate neuronal excitability, potentially enhancing tDCS effects.
• Integrating therapeutic activities may lead to improved acute and longer-lasting outcomes.
• Virtual reality presents a viable context for concurrent therapeutic engagement with tDCS.

Conclusions:

• Leveraging contextual dependence is a promising strategy to improve tDCS efficacy.
• Further research with extended follow-up is crucial for validating enhanced tDCS protocols.
• Combining tDCS with engaging therapeutic contexts may optimize treatment for major depressive disorder.