Skin Conductance Reactivity to Standardized Virtual Reality Combat Scenes in Veterans with PTSD

Area of Science:

• Psychiatry and Psychology
• Neuroscience
• Medical Technology

Background:

• Virtual reality (VR) is increasingly explored for posttraumatic stress disorder (PTSD) treatment and diagnosis.
• Advances in VR technology enhance its clinical utility for PTSD.
• Understanding physiological responses to VR stimuli is crucial for assessment.

Purpose of the Study:

• To investigate physiological responding (skin conductance) to standardized, non-personalized combat and non-combat VR events in Veterans with and without PTSD.
• To determine if VR can differentiate between combat Veterans with and without PTSD based on psychophysiological arousal.
• To explore the relationship between VR-induced arousal and PTSD symptom severity.

Main Methods:

• 19 Veterans with combat-related PTSD and 24 without were exposed to 12 VR scenarios (6 combat, 6 non-combat).
• Scenarios increased in emotional intensity through added events and repetition.
• Skin conductance was measured as a physiological indicator of arousal.

Main Results:

• Veterans with PTSD exhibited significantly higher skin conductance reactivity to combat VR events compared to those without PTSD.
• No significant difference in reactivity was observed for non-combat VR events.
• Both groups showed similar reductions in arousal upon repeated exposure to the same combat VR scenarios.
• Elevated arousal to combat VR correlated with hyperarousal symptom severity in the PTSD group.

Conclusions:

• Standardized, non-personalized VR combat stimuli can effectively distinguish Veterans with PTSD from those without based on psychophysiological arousal.
• VR assessment of physiological reactivity to trauma-related stimuli shows promise for PTSD diagnosis and treatment monitoring.
• The findings support VR's role as a valuable tool in the assessment of PTSD in combat Veterans.