Virtual Reality Exposure Therapy for Post Traumatic Stress Disorder

BusWorld

Civilians can be exposed to traumatic events. Most notably terrorist bombing attacks. In Israel, civilians are a frequent target of terrorist suicide bombers (e.g., attacks on civilians riding on public buses).

BusWorld is a simulation of a terrorist suicide bus-bombing attack designed to treat survivors for PTSD.

What is Post Traumatic Stress Disorder?
Patients with PTSD commonly have persistent traumatic thoughts, memories, or nightmares about the traumatic event; typically avoid thinking about the traumatic event; feel emotionally numb; and show social avoidance (e.g., avoid riding buses). Other common symptoms include recurring flashbacks, irritability, anger and rage, hypervigilance, bodily discomforts, and trouble sleeping.

In a recent publication this form of Virtual Reality Exposure Therapy was tested on 30 healthy volunteers without PTSD.

The objective of the present study was to measure the amount of anxiety elicited in nonsymptomatic adults in response to four progressively more intense levels of the BusWorld simulation toward the eventual use with people who have witnessed and survived a terrorist bus-bombing attack and developed PTSD.

What is Virtual Reality Exposure Therapy?
In Virtual Reality Exposure therapy, patients go into an immersive computer-generated environment (go back to the scene of the traumatic event) to help them gain access to their memories of the traumatic event, change unhealthy thought patterns, gradually habituate to their anxiety, and reduce the intensity of associated emotions. The therapist’s ability to manipulate the amount of anxiety experienced by the client during therapy is an important element of successful exposure therapy.

How was it done?
The therapist controls the severity of the scenario in the VRE therapy via the pressing of different function keys. The VR was programmed to have 4 levels of intensity. This way the participants and future PTSD patients can be exposed to graded exposure with 4 increasing levels of distress.

  • Level 1.
    The participant views the quiet street scene in the absence of any action. The events are viewed
    from an urban Israeli sidewalk, near a café, across the street from a bus stop
  • Level 2.
    A bus appears and approaches the bus stop, but there is no explosion.
  • Level 3.
    The bus arrives at the bus stop and explodes; the bus is seen to be burning, there is smoke and shattered glass on the street, but there are no accompanying sound effects.
  • Level 4.
    This level is the same as Level 3, except with the addition of sounds of the bus exploding, people screaming and crying, as well as police sirens and reflections of flashing police-car lights (police car is not visible to participants) but in this level it is clear to see that there has already been some victims injured in a car accident.

In this study with healthy participants the level of distress increased with each level. This suggests that BusWorld may prove to be a valuable medium for providing graded exposure for individuals suffering from PTSD originating from suicide bus bombings.

The website of the developers of BusWorld

It has already been tried with survivors of the 9/11 attack on the World Trade Center:

a graded immersive simulation of the events of September 11, 2001, at the World Trade Center in Manhattan.

This has been studied in a controlled trial with a waiting list group. The VRE was more efficacious in reducing PTSD symptoms.

PTSD, Soldiers and War
In a recent article in British Medical Journal it is concluded that an association was found between deployment for more than a year in the past three years and mental health that might be explained by exposure to combat. In other words: Personnel who were deployed for 13 months or more in the past three years were more likely to fulfil the criteria for post-traumatic stress disorder, scored worse on the general health questionnaire, and have multiple physical symptoms. PTSD is frequent among soldiers exposed to combat.

Virtual Reality Exposure Therapy with PTSD in soldiers

This therapy has been used with Vietnam veterans with PTSD:

a helicopter hovering over a rice paddy field, which clients viewed via a head-mounted display

This has been studied in an open trial with good efficacy for PTSD.

But can Soldiers benefit from Technology-Based Approaches to Mental Health Care

A recent study utilized a survey-based approach to examine pre- and post-deployed Soldiers’ knowledge of and attitudes toward using technology to access mental health care.

This study examined 352 U.S. Soldiers’ knowledge of and attitudes toward using technology to access mental health care. Results indicated that Soldiers were quite experienced with a wide variety of technology-based tools commonly proposed to facilitate mental health care. In addition, the majority of participants stated that they would be willing to use nearly every technology-based approach for mental health care included in the survey. Notably, 33% of Soldiers who were not willing to talk to a counselor in person were willing to utilize at least one of the technologies for mental health care.

This is especially important since soldiers often face unique barriers to care, including geographic location, deployment, complex duty environments, and fear of treatment stigma, and may not access the mental health care services they need.

ResearchBlogging.org
Naomi Josman, Ayelet Reisberg, Patrice L. Weiss, Azucena Garcia-Palacios, Hunter G. Hoffman (2008). BusWorld: An Analog Pilot Test of a Virtual Environment Designed to Treat Posttraumatic Stress Disorder Originating from a Terrorist Suicide Bomb Attack CyberPsychology & Behavior, 2147483647-3 DOI: 10.1089/cpb.2008.0048
R. J Rona, N. T Fear, L. Hull, N. Greenberg, M. Earnshaw, M. Hotopf, S. Wessely (2007). Mental health consequences of overstretch in the UK armed forces: first phase of a cohort study BMJ, 335 (7620), 603-603 DOI: 10.1136/bmj.39274.585752.BE
Jaime A. B. Wilson, Kristin Onorati, Matt Mishkind, Mark A. Reger, Gregory A. Gahm (2008). Soldier Attitudes about Technology-Based Approaches to Mental Health Care CyberPsychology & Behavior, 2147483647-3 DOI: 10.1089/cpb.2008.0071