Causally mapping human threat extinction relevant circuits with depolarizing brain stimulation methods.

Area of Science:

• Neuroscience
• Psychology
• Clinical Research

Background:

• Exposure therapy and laboratory threat extinction share core principles of confronting feared stimuli.
• Impaired threat extinction is linked to anxiety disorders, potentially hindering therapy effectiveness and leading to relapse.

Purpose of the Study:

• To propose a pre-clinical human research agenda to improve exposure therapy outcomes.
• To explore the use of brain stimulation methods to enhance threat extinction circuits.

Main Methods:

• Reviewing the overlap between laboratory threat extinction and exposure therapy.
• Proposing the concurrent application of transcranial magnetic stimulation (TMS) and deep brain stimulation (DBS) with extinction paradigms.
• Identifying key brain regions involved in threat extinction, including the amygdala, hippocampus, and prefrontal cortex.

Main Results:

• Current methods to boost extinction, largely based on rodent models, have shown limited success in humans.
• Connectivity-guided brain stimulation offers a novel approach to causally map and modulate human extinction circuits.
• Specific stimulation timing during learning phases may strengthen threat extinction.

Conclusions:

• A human-focused research agenda is needed to bridge the gap between rodent and human neurobiology in extinction research.
• Integrating brain stimulation with extinction paradigms holds promise for enhancing exposure therapy.
• Targeting specific neural circuits with precision stimulation could lead to more effective treatments for anxiety disorders.