Positive Technology Journal

Reactivity to cannabis cues in virtual reality environments.

J Psychoactive Drugs. 2009 Jun;41(2):105-12

Authors: Bordnick PS, Copp HL, Traylor A, Graap KM, Carter BL, Walton A, Ferrer M

Virtual reality (VR) cue environments have been developed and successfully tested in nicotine, cocaine, and alcohol abusers. Aims in the current article include the development and testing of a novel VR cannabis cue reactivity assessment system. It was hypothesized that subjective craving levels and attention to cannabis cues would be higher in VR environments with cannabis cues compared to VR neutral environments. Twenty nontreatment-seeking current cannabis smokers participated in the VR cue trial. During the VR cue trial, participants were exposed to four virtual environments that contained audio, visual, olfactory, and vibrotactile sensory stimuli. Two VR environments contained cannabis cues that consisted of a party room in which people were smoking cannabis and a room containing cannabis paraphernalia without people. Two VR neutral rooms without cannabis cues consisted of a digital art gallery with nature videos. Subjective craving and attention to cues were significantly higher in the VR cannabis environments compared to the VR neutral environments. These findings indicate that VR cannabis cue reactivity may offer a new technology-based method to advance addiction research and treatment.

Increased personal space of patients with schizophrenia in a virtual social environment.

Psychiatry Res. 2009 Sep 15;

Authors: Park SH, Ku J, Kim JJ, Jang HJ, Kim SY, Kim SH, Kim CH, Lee H, Kim IY, Kim SI

Virtual reality may be a good alternative method for measuring personal space and overcoming some limitations in previous studies on the social aspects of schizophrenia. Using this technology, we aimed to investigate the characteristics of personal space in patients with schizophrenia and evaluate the relationship between their social behaviors and schizophrenic symptoms. The distance from a virtual person and the angle of head orientation while talking to a virtual person in a virtual environment were measured in 30 patients with schizophrenia and 30 normal controls. It was found that patients with schizophrenia had longer distances and larger angles than did normal controls. The severity of the negative syndrome had significant inverse correlations with the distance from the angry and neutral virtual persons and with the angle of head orientation toward the happy and angry virtual persons, suggesting that negative symptoms may have a close relationship with personal space, including distancing and eye gaze. The larger personal space of patients may reflect their discomfort in close situations or cognitive deficits. Showing these profiles to patients could help them realize the amount of personal space they need.

The use of biofeedback in clinical virtual reality: the intrepid project.

Stud Health Technol Inform. 2009;144:128-32

Authors: Repetto C, Gorini A, Algeri D, Vigna C, Gaggioli A, Riva G

In our protocol for the treatment of Generalized Anxiety Disorders we use Virtual reality (VR) to facilitate emotional regulation and the relaxation process. Using a biofeedback biomonitoring system (GSR, HR, Thermal) the patient is made aware of his or her reactions through the modification of some features of the VR environment in real time. Using mental exercises the patient learns to control these physiological parameters and using the feedback provided by the virtual environment is able to gauge his or her success. To test this concept, we planned a randomized controlled trial (NCT00602212), including three groups of 15 patients each (for a total of 45 patients): (1) the VR group, (2) the non-VR group, and (3) the waiting list (WL) group.

A virtual reality-based system integrated with fmri to study neural mechanisms of action observation-execution: A proof of concept study.

Restor Neurol Neurosci. 2009;27(3):209-23

Authors: Adamovich SV, August K, Merians A, Tunik E

Purpose: Emerging evidence shows that interactive virtual environments (VEs) may be a promising tool for studying sensorimotor processes and for rehabilitation. However, the potential of VEs to recruit action observation-execution neural networks is largely unknown. For the first time, a functional MRI-compatible virtual reality system (VR) has been developed to provide a window into studying brain-behavior interactions. This system is capable of measuring the complex span of hand-finger movements and simultaneously streaming this kinematic data to control the motion of representations of human hands in virtual reality. Methods: In a blocked fMRI design, thirteen healthy subjects observed, with the intent to imitate (OTI), finger sequences performed by the virtual hand avatar seen in 1st person perspective and animated by pre-recorded kinematic data. Following this, subjects imitated the observed sequence while viewing the virtual hand avatar animated by their own movement in real-time. These blocks were interleaved with rest periods during which subjects viewed static virtual hand avatars and control trials in which the avatars were replaced with moving non-anthropomorphic objects. Results: We show three main findings. First, both observation with intent to imitate and imitation with real-time virtual avatar feedback, were associated with activation in a distributed frontoparietal network typically recruited for observation and execution of real-world actions. Second, we noted a time-variant increase in activation in the left insular cortex for observation with intent to imitate actions performed by the virtual avatar. Third, imitation with virtual avatar feedback (relative to the control condition) was associated with a localized recruitment of the angular gyrus, precuneus, and extrastriate body area, regions which are (along with insular cortex) associated with the sense of agency. Conclusions: Our data suggest that the virtual hand avatars may have served as disembodied training tools in the observation condition and as embodied "extensions" of the subject's own body (pseudo-tools) in the imitation. These data advance our understanding of the brain-behavior interactions when performing actions in VE and have implications in the development of observation- and imitation-based VR rehabilitation paradigms.

Scientists from the Universities of York and Warwick have developed the first Virtual Reality system that allows users to see, hear, smell taste and even touch. The prototype will be presented at Pioneers 09', an EPSRC showcase event to be held at London's Olympia Conference Centre on March 4

If the prototype can really do what it promises, it can have widespread applications in education, business, medical visualization and cybertherapy.

Virtual reality in acquired brain injury upper limb rehabilitation: evidence-based evaluation of clinical research.

Brain Inj. 2009 Mar;23(3):179-91

Authors: Mumford N, Wilson PH

PRIMARY OBJECTIVE: Acquired brain injury (ABI) is associated with significant cognitive, behavioural, psychological and physical impairment. Hence, it has been important to leverage assessment approaches in rehabilitation by using current and emerging technologies, including virtual reality (VR). A number of VR rehabilitation programmes have been designed in recent years, mainly to improve upper limb function. However, before this technology gains widespread use, evaluation of the scientific evidence supporting VR-assisted rehabilitation is needed. The present review aimed to assess the rationale, design and methodology of research investigating the clinical impact of VR on ABI upper-limb rehabilitation. RESEARCH DESIGN: A total of 22 studies were surveyed using a Cochrane-style review. RESEARCH METHODS: Studies were classified on a number of key criteria: theoretical bases and aims, sample populations and recruitment procedures, characteristics of the VR systems, evaluation design including control procedures and statistical analysis of results. Studies were rated using the Downs and Black (DB) scale. RESULTS: The review demonstrated that few studies used a conventional randomized controlled study design. Moderate support was shown for both teacher-animation and game-like systems. CONCLUSION: While VR-assisted rehabilitation shows early promise, clinicians are advised to be cautious about adopting these technologies before adequate data is available.

Assessing craving in young adult smokers using virtual reality.

Am J Addict. 2008 Sep-Oct;17(5):436-40

Authors: Traylor AC, Bordnick PS, Carter BL

Cigarette smokers, when confronted with cues associated with smoking, evidence strong reactions, including increased craving. These reactions have not been extensively studied in young adult smokers, a group that research suggests may respond differently than adults or adolescent smokers. We used virtual reality, which presents a complex array of smoking cues that may be particularly salient to young adult smokers, and measured self-report of craving. Young adult smokers responded strongly to these cues and, unlike adults, did not return to a baseline of craving following cue exposure, suggesting young adult smokers differ from other smokers in terms of cue responses.

Virtual reality exposure therapy for active duty soldiers.

J Clin Psychol. 2008 Jul 8;

Authors: Reger GM, Gahm GA

Virtual reality exposure therapy using a virtual Iraq: Case report.

J Trauma Stress. 2008 Apr 10;21(2):209-213

Authors: Gerardi M, Rothbaum BO, Ressler K, Heekin M, Rizzo A

Posttraumatic stress disorder (PTSD) has been estimated to affect up to 18% of returning Operation Iraqi Freedom (OIF) veterans. Soldiers need to maintain constant vigilance to deal with unpredictable threats, and an unprecedented number of soldiers are surviving serious wounds. These risk factors are significant for development of PTSD; therefore, early and efficient intervention options must be identified and presented in a form acceptable to military personnel. This case report presents the results of treatment utilizing virtual reality exposure (VRE) therapy (virtual Iraq) to treat an OIF veteran with PTSD. Following brief VRE treatment, the veteran demonstrated improvement in PTSD symptoms as indicated by clinically and statistically significant changes in scores on the Clinician Administered PTSD Scale (CAPS; Blake et al., 1990) and the PTSD Symptom Scale Self-Report (PSS-SR; Foa, Riggs, Dancu, & Rothbaum, 1993). These results indicate preliminary promise for this treatment.

The efficacy of an augmented virtual reality system to alleviate pain in children undergoing burns dressing changes: A randomised controlled trial.

Burns. 2008 Mar 4;

Authors: Mott J, Bucolo S, Cuttle L, Mill J, Hilder M, Miller K, Kimble RM