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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
#1
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/28634628/standardizing-hysteroscopy-teaching-development-of-a-curriculum-using-the-delphi-method
#2
Marie-Emmanuelle Neveu, Elodie Debras, Julien Niro, Hervé Fernandez, Pierre Panel
BACKGROUND: Hysteroscopy is performed often and in many indications but is challenging to learn. Hands-on training in live patients faces ethical, legal, and economic obstacles. Virtual reality simulation may hold promise as a hysteroscopy training tool. No validated curriculum specific in hysteroscopy exists. The aim of this study was to develop a hysteroscopy curriculum, using the Delphi method to identify skill requirements. METHODS: Based on a literature review using the key words "curriculum," "simulation," and "hysteroscopy," we identified five technical and non-technical areas in which skills were required...
June 20, 2017: Surgical Endoscopy
https://www.readbyqxmd.com/read/28632774/short-term-eeg-dynamics-and-neural-generators-evoked-by-navigational-images
#3
Axelle Leroy, Carlos Cevallos, Ana-Maria Cebolla, Stéphanie Caharel, Bernard Dan, Guy Cheron
The ecological environment offered by virtual reality is primarily supported by visual information. The different image contents and their rhythmic presentation imply specific bottom-up and top-down processing. Because these processes already occur during passive observation we studied the brain responses evoked by the presentation of specific 3D virtual tunnels with respect to 2D checkerboard. For this, we characterized electroencephalograhy dynamics (EEG), the evoked potentials and related neural generators involved in various visual paradigms...
2017: PloS One
https://www.readbyqxmd.com/read/28630450/concurrent-talking-in-immersive-virtual-reality-on-the-dominance-of-visual-speech-cues
#4
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
#5
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/28626885/intraocular-surgery-assessment-and-transfer-of-skills-using-a-virtual-reality-simulator
#6
Ann Sofia Skou Thomsen
No abstract text is available yet for this article.
June 2017: Acta Ophthalmologica
https://www.readbyqxmd.com/read/28624230/the-correlation-between-fundamental-characteristics-and-first-time-performance-in-laparoscopic-tasks
#7
Cuan M Harrington, Richard Bresler, Donncha Ryan, Patrick Dicker, Oscar Traynor, Dara O Kavanagh
BACKGROUND: The ability of characteristics to predict first time performance in laparoscopic tasks is not well described. Videogame experience predicts positive performance in laparoscopic experiences but its mechanism and confounding-association with aptitude remains to be elucidated. This study sought to evaluate for innate predictors of laparoscopic performance in surgically naive individuals with minimal videogame exposure. METHODS: Participants with no prior laparoscopic exposure and minimal videogaming experience were recruited consecutively from preclinical years at a medical university...
June 8, 2017: American Journal of Surgery
https://www.readbyqxmd.com/read/28618334/comprehensive-modelling-and-simulation-of-cylindrical-nanoparticles-manipulation-by-using-a-virtual-reality-environment
#8
Moharam Habibnejad Korayem, Ali Kafash Hoshiar, Maedeh Ghofrani
With the expansion of nanotechnology, robots based on atomic force microscope (AFM) have been widely used as effective tools for displacing nanoparticles and constructing nanostructures. One of the most limiting factors in AFM-based manipulation procedures is the inability of simultaneously observing the controlled pushing and displacing of nanoparticles while performing the operation. To deal with this limitation, a virtual reality environment has been used in this paper for observing the manipulation operation...
June 8, 2017: Journal of Molecular Graphics & Modelling
https://www.readbyqxmd.com/read/28618306/effects-of-acute-exercise-on-fear-extinction-in-rats-and-exposure-therapy-in-humans-null-findings-from-five-experiments
#9
Jolene Jacquart, Rheall F Roquet, Santiago Papini, Mark B Powers, David Rosenfield, Jasper A J Smits, Marie-H Monfils
BACKGROUND: Exposure therapy is an established learning-based intervention for the treatment of anxiety disorders with an average response rate of nearly 50%, leaving room for improvement. Emerging strategies to enhance exposure therapy in humans and fear extinction retention in animal models are primarily pharmacological. These approaches are limited as many patients report preferring non-pharmacological approaches in therapy. With general cognitive enhancement effects, exercise has emerged as a plausible non-pharmacological augmentation strategy...
June 4, 2017: Journal of Anxiety Disorders
https://www.readbyqxmd.com/read/28617954/mind-the-movement-frontal-asymmetry-stands-for-behavioral-motivation-bilateral-frontal-activation-for-behavior
#10
Johannes Rodrigues, Mathias Müller, Andreas Mühlberger, Johannes Hewig
Frontal asymmetry has been investigated over the past 30 years, and several theories have been developed about its meaning. The original theory of Davidson and its diversification by Harmon-Jones & Allen allocated approach motivation to relative left frontal brain activity and withdrawal motivation to relative right frontal brain activity. Hewig and colleagues extended this theory by adding bilateral frontal activation representing a biological correlate of the behavioral activation system if actual behavior is shown...
June 15, 2017: Psychophysiology
https://www.readbyqxmd.com/read/28615330/the-visual-encoding-of-purely-proprioceptive-intermanual-tasks-is-due-to-the-need-of-transforming-joint-signals-not-to-their-inter-hemispheric-transfer
#11
Léo Arnoux, Sebastien Fromentin, Dario Farotto, Mathieu Beraneck, Joseph McIntyre, Michele Tagliabue
To perform goal-oriented hand movement humans combine multiple sensory signals (e.g. vision and proprioception) that can be encoded in various reference frames (body-centered and/or exo-centered). In a previous study we showed that when aligning a hand to a remembered target orientation the brain encodes both target and response in visual space when the target is sensed by one hand and the response is performed by the other, even though both are sensed only through proprioception. Here we ask whether such visual encoding is due i) to the necessity of transferring sensory information across the brain hemispheres or ii) to the necessity, due to the arms' anatomical mirror symmetry, of transforming the joint signals of one limb into the reference frame of the other...
June 14, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28615276/bluehealth-a-study-programme-protocol-for-mapping-and-quantifying-the-potential-benefits-to-public-health-and-well-being-from-europe-s-blue-spaces
#12
James Grellier, Mathew P White, Maria Albin, Simon Bell, Lewis R Elliott, Mireia Gascón, Silvio Gualdi, Laura Mancini, Mark J Nieuwenhuijsen, Denis A Sarigiannis, Matilda van den Bosch, Tanja Wolf, Susanne Wuijts, Lora E Fleming
INTRODUCTION: Proximity and access to water have long been central to human culture and accordingly deliver countless societal benefits. Over 200 million people live on Europe's coastline, and aquatic environments are the top recreational destination in the region. In terms of public health, interactions with 'blue space' (eg, coasts, rivers, lakes) are often considered solely in terms of risk (eg, drowning, microbial pollution). Exposure to blue space can, however, promote health and well-being and prevent disease, although underlying mechanisms are poorly understood...
June 14, 2017: BMJ Open
https://www.readbyqxmd.com/read/28614234/motion-based-equilibrium-reprocessing-therapy-a-novel-treatment-method-for-chronic-peripheral-vestibulopathies-a-pilot-study
#13
Mirke S Hondebrink, Agali Mert, Roos van der Lint, J Alexander de Ru, Peter van der Wurff
Rehabilitation for vestibular disease is a safe method to partially alleviate symptoms of vertigo. It was hypothesized that principles of military aviation vestibular desensitization procedures that have a success rate of more than 80% can be extrapolated to chronic vestibular disease as well.The virtual reality motion base computer-assisted rehabilitation environment was used as treatment modality in 17 patients. They were exposed to sinusoidal vertical passive whole body motion in increasing intensity for a maximum of 12 sessions...
June 2017: Medicine (Baltimore)
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/28610816/egocentric-distance-perception-and-performance-of-direct-pointing-in-stereoscopic-displays
#16
Chiuhsiang J Lin, Bereket H Woldegiorgis
In this study, the interaction performances and spatial perceptions in stereoscopic environments were investigated. The experiment compared direct user interactions during pointing at a target, which was continuously visible or presented briefly and disappeared, in both stereoscopic and real environments, at three parallax/depth levels. The position data, collected by a motion system, were used to compute accuracy, signed error, movement time, and throughput. The results showed inaccurate egocentric distance judgment in stereoscopic displays and accurate perceptions in the real world...
October 2017: Applied Ergonomics
https://www.readbyqxmd.com/read/28610445/aversive-eye-gaze-during-a-speech-in-virtual-environment-in-patients-with-social-anxiety-disorder
#17
Haena Kim, Jung Eun Shin, Yeon-Ju Hong, Yu-Bin Shin, Young Seok Shin, Kiwan Han, Jae-Jin Kim, Soo-Hee Choi
OBJECTIVE: One of the main characteristics of social anxiety disorder is excessive fear of social evaluation. In such situations, anxiety can influence gaze behaviour. Thus, the current study adopted virtual reality to examine eye gaze pattern of social anxiety disorder patients while presenting different types of speeches. METHODS: A total of 79 social anxiety disorder patients and 51 healthy controls presented prepared speeches on general topics and impromptu speeches on self-related topics to a virtual audience while their eye gaze was recorded...
June 1, 2017: Australian and New Zealand Journal of Psychiatry
https://www.readbyqxmd.com/read/28608962/image-based-computational-fluid-dynamics-in-the-lung-virtual-reality-or-new-clinical-practice
#18
REVIEW
Kelly S Burrowes, Jan De Backer, Haribalan Kumar
The development and implementation of personalized medicine is paramount to improving the efficiency and efficacy of patient care. In the respiratory system, function is largely dictated by the choreographed movement of air and blood to the gas exchange surface. The passage of air begins in the upper airways, either via the mouth or nose, and terminates at the alveolar interface, while blood flows from the heart to the alveoli and back again. Computational fluid dynamics (CFD) is a well-established tool for predicting fluid flows and pressure distributions within complex systems...
June 13, 2017: Wiley Interdisciplinary Reviews. Systems Biology and Medicine
https://www.readbyqxmd.com/read/28606661/effects-of-virtual-reality-training-using-xbox-kinect-on-motor-function-in-stroke-survivors-a-preliminary-study
#19
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/28602353/visuomotor-coupling-shapes-the-functional-development-of-mouse-visual-cortex
#20
Alexander Attinger, Bo Wang, Georg B Keller
The emergence of sensory-guided behavior depends on sensorimotor coupling during development. How sensorimotor experience shapes neural processing is unclear. Here, we show that the coupling between motor output and visual feedback is necessary for the functional development of visual processing in layer 2/3 (L2/3) of primary visual cortex (V1) of the mouse. Using a virtual reality system, we reared mice in conditions of normal or random visuomotor coupling. We recorded the activity of identified excitatory and inhibitory L2/3 neurons in response to transient visuomotor mismatches in both groups of mice...
June 15, 2017: Cell
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