Neuroscience Informed Prolonged Exposure Practice: Increasing Efficiency and Efficacy Through Mechanisms

Area of Science:

• Neuroscience
• Psychiatry
• Psychology

Background:

• Posttraumatic stress disorder (PTSD) is characterized by disrupted neurobiological networks.
• Prolonged exposure (PE) therapy is an empirically supported treatment for PTSD.

Purpose of the Study:

• To review the neurobiological underpinnings of PTSD and PE.
• To discuss the theoretical basis and mechanisms of PE's effectiveness.
• To identify potential enhancements for PE to improve treatment response and retention.

Main Methods:

• Focused review of existing literature on PTSD, PE, and neurobiology.
• Analysis of neuroimaging studies examining neural connectivity changes.
• Evaluation of studies on pharmacological and non-pharmacological interventions as PE enhancements.

Main Results:

• PE enhances functional connectivity within and between key brain regions implicated in PTSD, such as the vmPFC, amygdala, hippocampus, and dlPFC.
• Successful fear extinction recall during PE correlates with increased functional coherence between the vmPFC, amygdala, and hippocampus.
• Pre-existing neural connectivity patterns can predict treatment response to PE.
• Enhancements like SSRIs, DCS, ALLO, propranolol, rTMS, oxytocin, and MDMA have been explored with PE.

Conclusions:

• Neural connectivity is crucial to PE's mechanism of action.
• Repetitive transcranial magnetic stimulation (rTMS) is a promising enhancement for PE due to its impact on neural connectivity.
• Further research into oxytocin and MDMA as adjuncts to PE may improve treatment engagement and retention for PTSD patients.