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https://www.readbyqxmd.com/read/28646388/skin-conductance-reactivity-to-standardized-virtual-reality-combat-scenes-in-veterans-with-ptsd
#1
Mascha van 't Wout, Christopher M Spofford, William S Unger, Elizabeth B Sevin, M Tracie Shea
Interest in virtual reality (VR) as a clinical tool to augment posttraumatic stress (PTSD) treatment has grown substantially in recent years due to advances in VR technology. Moreover, its potential assisted use in the PTSD diagnostic process has been recognized. In this study we examined physiological responding, skin conductance, to a standardized presentation of non-personalized combat-related VR events (e.g. encountering enemy fire; explosions) as compared to non-combat classroom VR events in 19 Veterans with and 24 Veterans without combat-related PTSD who had been deployed to Iraq and Afghanistan...
June 23, 2017: Applied Psychophysiology and Biofeedback
https://www.readbyqxmd.com/read/28645608/the-role-of-losartan-in-preventing-vascular-remodeling-in-spontaneously-hypertensive-rats-by-inhibition-of-the-h2o2-vpo1-hocl-mmps-pathway
#2
Liangqing Ge, Guogang Zhang, Baiyang You, Guangjie Cheng, Luyao Chen, Ruizheng Shi
Vascular peroxidase 1 (VPO1) has been proved to be associated with vascular endothelial cell apoptosis by producing reactive oxygen species. However, the contribution of VPO1 to the development of vascular remodeling (VR) remains to be fully characterized. We explored the role of VPO1 in VR in spontaneously hypertensive rats (SHRs) and the underlying mechanism of losartan in inhibiting VR. Compared to Wistar-Kyoto (WKY) rats, the SHR showed remodeling of their vascular walls. The level of VPO1 and the hydrogen peroxide (H2O2) concentration were increased in the SHRs...
June 20, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28644422/immersive-virtual-reality-for-pediatric-pain
#3
REVIEW
Andrea Stevenson Won, Jakki Bailey, Jeremy Bailenson, Christine Tataru, Isabel A Yoon, Brenda Golianu
Children must often endure painful procedures as part of their treatment for various medical conditions. Those with chronic pain endure frequent or constant discomfort in their daily lives, sometimes severely limiting their physical capacities. With the advent of affordable consumer-grade equipment, clinicians have access to a promising and engaging intervention for pediatric pain, both acute and chronic. In addition to providing relief from acute and procedural pain, virtual reality (VR) may also help to provide a corrective psychological and physiological environment to facilitate rehabilitation for pediatric patients suffering from chronic pain...
June 23, 2017: Children
https://www.readbyqxmd.com/read/28643157/effect-of-variance-ratio-on-anova-robustness-might-1-5-be-the-limit
#4
María J Blanca, Rafael Alarcón, Jaume Arnau, Roser Bono, Rebecca Bendayan
Inconsistencies in the research findings on F-test robustness to variance heterogeneity could be related to the lack of a standard criterion to assess robustness or to the different measures used to quantify heterogeneity. In the present paper we use Monte Carlo simulation to systematically examine the Type I error rate of F-test under heterogeneity. One-way, balanced, and unbalanced designs with monotonic patterns of variance were considered. Variance ratio (VR) was used as a measure of heterogeneity (1.5, 1...
June 22, 2017: Behavior Research Methods
https://www.readbyqxmd.com/read/28641990/do-negative-emotions-expressed-during-follow-up-consultations-with-adolescent-survivors-of-childhood-cancer-reflect-late-effects
#5
Anneli V Mellblom, Ellen Ruud, Jon Håvard Loge, Hanne C Lie
OBJECTIVE: To explore whether negative emotions expressed by adolescent cancer survivors during follow-up consultations were associated with potential late effects (persisting disease or treatment-related health problems). METHODS: We video-recorded 66 follow-up consultations between 10 pediatricians and 66 adolescent survivors of leukemia, lymphoma or stem-cell transplantations. In transcripts of the recordings, we identified utterances coded as both 1) expressions of negative emotions (VR-CoDES), and 2) late effect-related discussions...
June 14, 2017: Patient Education and Counseling
https://www.readbyqxmd.com/read/28641235/computer-aided-training-sensorimotor-cortex-functions-in-humans-before-the-upper-limb-transplantation-using-virtual-reality-and-sensory-feedback
#6
Marek Kurzynski, Anna Jaskolska, Jaroslaw Marusiak, Andrzej Wolczowski, Przemyslaw Bierut, Lukasz Szumowski, Jerzy Witkowski, Katarzyna Kisiel-Sajewicz
One of the biggest problems of upper limb transplantation is lack of certainty as to whether a patient will be able to control voluntary movements of transplanted hands. Based on findings of the recent research on brain cortex plasticity, a premise can be drawn that mental training supported with visual and sensory feedback can cause structural and functional reorganization of the sensorimotor cortex, which leads to recovery of function associated with the control of movements performed by the upper limbs. In this study, authors - based on the above observations - propose the computer-aided training (CAT) system, which generating visual and sensory stimuli, should enhance the effectiveness of mental training applied to humans before upper limb transplantation...
June 15, 2017: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/28637611/emotional-communication-in-support-groups-for-siblings-of-children-with-disabilities
#7
Torun Marie Vatne, Erica Zahl
OBJECTIVE: Support groups are often arranged for siblings of children with disabilities to prevent psychological maladjustment. This study describes how children express emotions in support groups and how group leaders and other children respond. METHOD: Conversations in 17 group sessions for siblings aged 11 to 16 were coded with VR-CoDES to report frequency of emotional expressions and responses. RESULTS: Children expressed negative emotion during group sessions (n=235), 59% as cues and 41%concerns...
June 8, 2017: Patient Education and Counseling
https://www.readbyqxmd.com/read/28635123/measuring-fitness-heritability-life-history-traits-versus-morphological-traits-in-humans
#8
Alina Gavrus-Ion, Torstein Sjøvold, Miguel Hernández, Rolando González-José, María Esther Esteban Torné, Neus Martínez-Abadías, Mireia Esparza
OBJECTIVES: Traditional interpretation of Fisher's Fundamental Theorem of Natural Selection is that life history traits (LHT), which are closely related with fitness, show lower heritabilities, whereas morphological traits (MT) are less related with fitness and they are expected to show higher heritabilities. In humans, although few studies have examined the heritability of LHT and MT, none of them have analyzed the same sample for comparative purposes. Here we assessed, for the first time, the heritability, additive genetic variance (VA ), residual variance (VR ) and coefficient of genetic additive variation (CVA ) values of LHT and MT in a singular collection of identified skulls with associated demographic records from Hallstatt (Austria)...
June 21, 2017: American Journal of Physical Anthropology
https://www.readbyqxmd.com/read/28634632/can-a-virtual-reality-surgical-simulation-training-provide-a-self-driven-and-mentor-free-skills-learning-investigation-of-the-practical-influence-of-the-performance-metrics-from-the-virtual-reality-robotic-surgery-simulator-on-the-skill-learning-and-associated
#9
Gyusung I Lee, Mija R Lee
BACKGROUND: While it is often claimed that virtual reality (VR) training system can offer self-directed and mentor-free skill learning using the system's performance metrics (PM), no studies have yet provided evidence-based confirmation. This experimental study investigated what extent to which trainees achieved their self-learning with a current VR simulator and whether additional mentoring improved skill learning, skill transfer and cognitive workloads in robotic surgery simulation training...
June 20, 2017: Surgical Endoscopy
https://www.readbyqxmd.com/read/28632001/vasodilator-responsiveness-in-idiopathic-pulmonary-arterial-hypertension-identifying-a-distinct-phenotype-with-distinct-physiology-and-distinct-prognosis
#10
David Langleben, Stylianos Orfanos
Within the cohort of patients suffering from idiopathic pulmonary arterial hypertension (IPAH) is a group that responds dramatically (VR-PAH) to an acute vasodilator challenge and that has excellent long-term hemodynamic improvement and prognosis on high dose calcium channel blockers compared with vasodilator non-responders (VN-PAH). For the purposes of diagnosing VR-PAH, there is to date no test to replace the acute vasodilator challenge. However, recent studies have identified markers that may aid in the identification of VR-PAH, including peripheral blood lymphocyte RNA expression levels of desmogelin-2 and Ras homolog gene family member Q, and plasma levels of provirus integration site for Moloney murine leukemia virus...
June 20, 2017: Pulmonary Circulation
https://www.readbyqxmd.com/read/28630450/concurrent-talking-in-immersive-virtual-reality-on-the-dominance-of-visual-speech-cues
#11
Mar Gonzalez-Franco, Antonella Maselli, Dinei Florencio, Nikolai Smolyanskiy, Zhengyou Zhang
Humans are good at selectively listening to specific target conversations, even in the presence of multiple concurrent speakers. In our research, we study how auditory-visual cues modulate this selective listening. We do so by using immersive Virtual Reality technologies with spatialized audio. Exposing 32 participants to an Information Masking Task with concurrent speakers, we find significantly more errors in the decision-making processes triggered by asynchronous audiovisual speech cues. More precisely, the results show that lips on the Target speaker matched to a secondary (Mask) speaker's audio severely increase the participants' comprehension error rates...
June 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28628386/comparison-of-path-length-and-ranges-of-movement-of-the-center-of-pressure-and-reaction-time-and-between-paired-play-and-solo-play-of-a-virtual-reality-game
#12
Sigal Portnoy, Ayelet Hersch, Tal Sofer, Sarit Tresser
AIMS: To test whether paired-play will induce longer path length and ranges of movement of the center of pressure (COP), which reflects on balance performance and stability, compared to solo-play and to test the difference in the path length and ranges of movement of the COP while playing the virtual reality (VR) game with the dominant hand compared to playing it with the nondominant hand. METHODS: In this cross-sectional study 20 children (age 6.1 ± 0.7 years old) played an arm movement controlled VR game alone and with a peer while each of them stood on a pressure measuring pad to track the path length and ranges of movement of the COP...
June 2017: Games for Health
https://www.readbyqxmd.com/read/28619168/comparison-of-asian-porcine-high-fever-disease-isolates-of-porcine-reproductive-and-respiratory-syndrome-virus-to-united-states-isolates-for-their-ability-to-cause-disease-and-secondary-bacterial-infection-in-swine
#13
Susan L Brockmeier, Crystal L Loving, Mitchel V Palmer, Allyn Spear, Tracy L Nicholson, Kay S Faaberg, Kelly M Lager
Epidemiologic data from Asian outbreaks of highly-pathogenic (HP) porcine reproductive and respiratory syndrome virus (PRRSV) suggest that disease severity was associated with both the virulence of the PRRSV isolates and secondary bacterial infections. Previous reports have indicated that U.S. isolates of PRRSV predispose to secondary bacterial infections as well, but the severity of disease that occurred in Asia in pigs infected with these HP-PRRSV strains has not been reported in the U.S. The objectives of this research were to compare the pathogenesis of Asian and U...
May 2017: Veterinary Microbiology
https://www.readbyqxmd.com/read/28613177/walking-with-virtual-people-evaluation-of-locomotion-interfaces-in-dynamic-environments
#14
Anne-Helene Olivier, Julien Bruneau, Richard Kulpa, Julien Pettre
Navigating in virtual environments requires using some locomotion interfaces, especially when the dimensions of the environments exceed the ones of the Virtual Reality system. Locomotion interfaces induce some biases both in the perception of the self-motion or in the formation of virtual locomotion trajectories. These biases have been mostly evaluated in the context of static environments, and studies need to be revisited in the new context of populated environments where users interact with virtual characters...
June 12, 2017: IEEE Transactions on Visualization and Computer Graphics
https://www.readbyqxmd.com/read/28611387/visuotactile-integration-modulates-motor-performance-in-a-perceptual-decision-making-task
#15
Klaudia Grechuta, Jelena Guga, Giovanni Maffei, Belen Ballester Rubio, Paul F M J Verschure
Body ownership is critically dependent on multimodal integration as for instance revealed in the Rubber Hand Illusion (RHI) and a number of studies which have addressed the neural correlates of the processes underlying this phenomenon. Both experimental and clinical research have shown that the structures underlying body ownership seem to significantly overlap with those of motor control including the parietal and ventral premotor cortices, Temporal Parietal Junction (TPJ) and the insula. This raises the question of whether this structural overlap between body ownership and motor control structures is of any functional significance...
June 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28610822/vr-codes-and-patient-centeredness-the-intersection-points-between-a-measure-and-a-concept
#16
Lidia Del Piccolo
OBJECTIVE: The Verona Coding Definitions of Emotional sequences (VR-CoDES) system has been applied in a wide range of studies, in some of these, because of its attention on healthcare provider's ability to respond to patient emotions, it has been used as a proxy of patient-centeredness. The paper aims to discuss how the VR-CoDES can contribute to the broader concept of patient-centeredness and its limitations. METHODS: VR-CoDES and patient-centeredness concept are briefly described, trying to detect commonalities and distinctions...
May 5, 2017: Patient Education and Counseling
https://www.readbyqxmd.com/read/28606661/effects-of-virtual-reality-training-using-xbox-kinect-on-motor-function-in-stroke-survivors-a-preliminary-study
#17
Dae-Sung Park, Do-Gyun Lee, Kyeongbong Lee, GyuChang Lee
BACKGROUND: Although the Kinect gaming system (Microsoft Corp, Redmond, WA) has been shown to be of therapeutic benefit in rehabilitation, the applicability of Kinect-based virtual reality (VR) training to improve motor function following a stroke has not been investigated. This study aimed to investigate the effects of VR training, using the Xbox Kinect-based game system, on the motor recovery of patients with chronic hemiplegic stroke. METHODS: This was a randomized controlled trial...
June 9, 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/28606329/the-adaptation-of-a-360%C3%A2-camera-utilising-an-alternate-light-source-als-for-the-detection-of-biological-fluids-at-crime-scenes
#18
Kayleigh Sheppard, John P Cassella, Sarah Fieldhouse, Roberto King
One of the most important and commonly encountered evidence types that can be recovered at crime scenes are biological fluids. Due to the ephemeral nature of biological fluids and the valuable DNA that they can contain, it is fundamental that these are documented extensively and recovered rapidly. Locating and identifying biological fluids can prove a challenging task but can aid in reconstructing a sequence of events. Alternate light sources (ALS) offer powerful non-invasive methods for locating and enhancing biological fluids utilising different wavelengths of light...
July 2017: Science & Justice: Journal of the Forensic Science Society
https://www.readbyqxmd.com/read/28602088/extension-of-the-saft-vr-mie-eos-to-model-homonuclear-rings-and-its-parameterization-based-on-the-principle-of-corresponding-states
#19
Erich A Muller, Andrés Mejía
The statistical associating fluid theory of variable range employing a Mie potential (SAFT-VR-Mie) proposed by Lafitte et al. [J. Chem Phys. 2013, 139, 154504] is one of the latest versions of the SAFT family. This particular version has been shown to have a remarkable capability to connect experimental determinations, theoretical calculations and molecular simulations results. However, the theoretical development restricts the model to chains of beads connected in a linear fashion. In this work, the capabilities of the SAFT-VR Mie equation of state for modeling phase equilibria are extended for the case of planar ring compounds...
June 11, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28601374/quantitative-susceptibility-mapping-qsm-and-r2-in-the-human-brain-at-3t-evaluation-of-intra-scanner-repeatability
#20
Xiang Feng, Andreas Deistung, Jürgen R Reichenbach
Quantitative susceptibility mapping (QSM) and the effective transverse relaxation rate (R2*) can be used to monitor iron and myelin content in brain tissue, which are both subject to changes in many neurological diseases but also during healthy aging. In this study, we quantitatively assessed the repeatability of QSM and R2* by applying four independent scans in eight young healthy, female subjects on a 3T MRI scanner. Since QSM does not yield absolute values for bulk magnetic susceptibilities, we additionally investigated the influence of the choice of a reference brain region for susceptibility by computing susceptibility differences with respect to five different brain structures (whole brain, frontal white matter (fWM), internal capsule (IC), cerebrospinal fluid (CSF) in the lateral ventricle, cortical gray matter (cGM))...
June 7, 2017: Zeitschrift Für Medizinische Physik
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