Reward Processing and Circuit Dysregulation in Posttraumatic Stress Disorder

Area of Science:

• Neuroscience
• Psychiatry
• Behavioral Science

Background:

• Significant progress has been made in understanding the neurobiology of core post-traumatic stress disorder (PTSD) symptoms like intrusive memories and arousal.
• However, the neurobiological underpinnings of anhedonia and emotional numbing in PTSD, conceptualized as reward processing deficits (reward wanting and liking), are largely unexplored.

Purpose of the Study:

• To review the current understanding of human reward processing and PTSD neurocircuitry.
• To examine the existing empirical evidence on reward processing deficits in PTSD.
• To identify gaps in the literature and propose future research directions.

Main Methods:

• Literature review summarizing the state of science in human reward processing.
• Review of neurocircuitry implicated in PTSD pathophysiology.
• Synthesis of empirical evidence on reward processing abnormalities in PTSD.

Main Results:

• Limited empirical evidence currently exists on reward processing in PTSD.
• No studies have yet linked reward processing abnormalities to neurocircuitry-based models of PTSD.
• The review highlights significant gaps in understanding the neurobiology of anhedonia and emotional numbing in PTSD.

Conclusions:

• Studying reward processing in PTSD is essential for advancing our understanding of the disorder's pathophysiology.
• Investigating reward circuitry abnormalities could lead to enhanced treatment strategies targeting anhedonia and emotional numbing in PTSD patients.