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https://www.readbyqxmd.com/read/28641686/a-case-study-of-human-roll-tilt-perception-in-hypogravity
#1
Torin K Clark, Laurence R Young
BACKGROUND: Increased gravito-inertial acceleration, or hypergravity, such as produced in a centrifuge or in an aircraft coordinated turn, causes humans to systematically overestimate their roll tilt in the dark. This is known as the "G-excess" illusion. We have previously modified a mathematical observer model of dynamic orientation perception to replicate these illusory tilt perceptions. This modified model also made a novel, previously untested, prediction that humans would underestimate acute roll tilt in reduced gravitational environments (hypogravity)...
July 1, 2017: Aerospace Medicine and Human Performance
https://www.readbyqxmd.com/read/28588520/emotional-expression-in-simple-line-drawings-of-a-robot-s-face-leads-to-higher-offers-in-the-ultimatum-game
#2
Kazunori Terada, Chikara Takeuchi
In the present study, we investigated whether expressing emotional states using a simple line drawing to represent a robot's face can serve to elicit altruistic behavior from humans. An experimental investigation was conducted in which human participants interacted with a humanoid robot whose facial expression was shown on an LCD monitor that was mounted as its head (Study 1). Participants were asked to play the ultimatum game, which is usually used to measure human altruistic behavior. All participants were assigned to be the proposer and were instructed to decide their offer within 1 min by controlling a slider bar...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28585674/real-time-video-streaming-to-surgical-loupe-mounted-head-up-display-for-navigated-meningioma-resection
#3
Roberto Diaz, Jang Yoon, Robert Chen, Alfredo Quinones-Hinojosa, Robert Wharen, Ricardo Komotar
AIM: Wearable technology interfaces with normal human movement and function, thereby enabling more efficient and adaptable use.We developed a wearable display system for use with intra-operative neuronavigation for brain tumor surgery. MATERIAL AND METHODS: The Google glass head-up display system was adapted to surgical loupes with a video-streaming integrated hardware and software device for display of the Stealth S7 navigation screen. Phantom trials of surface ventriculostomy were performed...
April 30, 2017: Turkish Neurosurgery
https://www.readbyqxmd.com/read/28584247/see-through-optical-combiner-for-augmented-reality-head-mounted-display-index-matched-anisotropic-crystal-lens
#4
Jong-Young Hong, Chang-Kun Lee, Seungjae Lee, Byounghyo Lee, Dongheon Yoo, Changwon Jang, Jonghyun Kim, Jinsoo Jeong, Byoungho Lee
A novel see-through optical device to combine the real world and the virtual image is proposed which is called an index-matched anisotropic crystal lens (IMACL). The convex lens made of anisotropic crystal is enveloped with the isotropic material having same refractive index with the extraordinary refractive index of the anisotropic crystal. This optical device functions as the transparent glass or lens according to the polarization state of the incident light. With the novel optical property, IMACL can be utilized in the see-through near eye display, or head-mounted display for augmented reality...
June 5, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28573091/virtual-reality-and-augmented-reality-in-plastic-surgery-a-review
#5
REVIEW
Youngjun Kim, Hannah Kim, Yong Oock Kim
Recently, virtual reality (VR) and augmented reality (AR) have received increasing attention, with the development of VR/AR devices such as head-mounted displays, haptic devices, and AR glasses. Medicine is considered to be one of the most effective applications of VR/AR. In this article, we describe a systematic literature review conducted to investigate the state-of-the-art VR/AR technology relevant to plastic surgery. The 35 studies that were ultimately selected were categorized into 3 representative topics: VR/AR-based preoperative planning, navigation, and training...
May 2017: Archives of Plastic Surgery
https://www.readbyqxmd.com/read/28567271/the-accuracy-and-precision-of-position-and-orientation-tracking-in-the-htc-vive-virtual-reality-system-for-scientific-research
#6
Diederick C Niehorster, Li Li, Markus Lappe
The advent of inexpensive consumer virtual reality equipment enables many more researchers to study perception with naturally moving observers. One such system, the HTC Vive, offers a large field-of-view, high-resolution head mounted display together with a room-scale tracking system for less than a thousand U.S. dollars. If the position and orientation tracking of this system is of sufficient accuracy and precision, it could be suitable for much research that is currently done with far more expensive systems...
May 2017: I-Perception
https://www.readbyqxmd.com/read/28524449/technical-feasibility-and-safety-of-image-guided-parieto-occipital-ventricular-catheter-placement-with-the-assistance-of-a-wearable-head-up-display
#7
Jang W Yoon, Robert E Chen, Karim ReFaey, Roberto J Diaz, Ronald Reimer, Ricardo J Komotar, Alfredo Quinones-Hinojosa, Benjamin L Brown, Robert E Wharen
BACKGROUND: Wearable technology is growing in popularity as a result of its ability to interface with normal human movement and function. METHODS: Using proprietary hardware and software, neuronavigation images were captured and transferred wirelessly via a password-encrypted network to the head-up display. The operating surgeon wore a loupe-mounted wearable head-up display during image-guided parieto-occipital ventriculoperitoneal shunt placement in two patients...
May 19, 2017: International Journal of Medical Robotics + Computer Assisted Surgery: MRCAS
https://www.readbyqxmd.com/read/28505115/photosensor-based-latency-measurement-system-for-head-mounted-displays
#8
Min-Woo Seo, Song-Woo Choi, Sang-Lyn Lee, Eui-Yeol Oh, Jong-Sang Baek, Suk-Ju Kang
In this paper, a photosensor-based latency measurement system for head-mounted displays (HMDs) is proposed. The motion-to-photon latency is the greatest reason for motion sickness and dizziness felt by users when wearing an HMD system. Therefore, a measurement system is required to accurately measure and analyze the latency to reduce these problems. The existing measurement system does not consider the actual physical movement in humans, and its accuracy is also very low. However, the proposed system considers the physical head movement and is highly accurate...
May 15, 2017: Sensors
https://www.readbyqxmd.com/read/28504313/ultrasound-guided-fine-needle-aspiration-in-the-neck-region-using-an-optical-see-through-head-mounted-display-a-randomized-controlled-trial
#9
Naoki Kaneko, Mayumi Tsunoda, Masatsugu Mitsuhashi, Keisuke Okubo, Taro Takeshima, Yoshihide Sehara, Mutsumi Nagai, Kensuke Kawai
OBJECTIVES: The purpose of this study was to examine the feasibility of an optical see-through head-mounted display (OST-HMD) to improve ergonomics during ultrasound-guided fine-needle aspiration (FNA) in the neck region. METHODS: This randomized controlled study compared an OST-HMD with a normal ultrasound monitor during an ultrasound-guided FNA in the neck region. Patients with a neck tumor were recruited and randomized into one of two groups. Two practitioners performed ultrasound-guided FNA with or without the HMD, as indicated...
May 15, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/28502409/field-evaluation-of-a-wearable-multimodal-soldier-navigation-system
#10
Iina Aaltonen, Jari Laarni
Challenging environments pose difficulties for terrain navigation, and therefore wearable and multimodal navigation systems have been proposed to overcome these difficulties. Few such navigation systems, however, have been evaluated in field conditions. We evaluated how a multimodal system can aid in navigating in a forest in the context of a military exercise. The system included a head-mounted display, headphones, and a tactile vibrating vest. Visual, auditory, and tactile modalities were tested and evaluated using unimodal, bimodal, and trimodal conditions...
September 2017: Applied Ergonomics
https://www.readbyqxmd.com/read/28492431/experience-using-a-3d-head-mounted-display-system-in-ophthalmic-surgery
#11
José J Martínez-Toldos, Cristian Fernández-Martínez, Aída Navarro-Navarro
No abstract text is available yet for this article.
July 2017: Retina
https://www.readbyqxmd.com/read/28477229/feasibility-of-the-head-mounted-display-for-ultrasound-guided-nerve-blocks-a-pilot-simulator-study
#12
Yusuke Kasuya, Shota Moriwaki, Chiaki Inano, Tomoko Fukada, Ryu Komatsu, Makoto Ozaki
The head-mounted display (HMD) has the potential to improve the quality of ultrasound-guided procedures. The aim of this non-clinical crossover designed study is to evaluate the feasibility of the HMD for ultrasound-guided nerve block. Eight experienced anesthesiologists performed ultrasound-guided peripheral nerve blocks on a training simulator with a standard approach and with an upside-down approach. Each approach was performed with a control conventional method and with an HMD. The ultrasound image and operating field were recorded by video camera...
May 5, 2017: Journal of Anesthesia
https://www.readbyqxmd.com/read/28475502/the-use-of-virtual-reality-technology-in-the-treatment-of-anxiety-and-other-psychiatric-disorders
#13
Jessica L Maples-Keller, Brian E Bunnell, Sae-Jin Kim, Barbara O Rothbaum
After participating in this activity, learners should be better able to:• Evaluate the literature regarding the effectiveness of incorporating virtual reality (VR) in the treatment of psychiatric disorders• Assess the use of exposure-based intervention for anxiety disorders ABSTRACT: Virtual reality (VR) allows users to experience a sense of presence in a computer-generated, three-dimensional environment. Sensory information is delivered through a head-mounted display and specialized interface devices. These devices track head movements so that the movements and images change in a natural way with head motion, allowing for a sense of immersion...
May 2017: Harvard Review of Psychiatry
https://www.readbyqxmd.com/read/28448641/detecting-glaucoma-with-a-portable-brain-computer-interface-for-objective-assessment-of-visual-function-loss
#14
Masaki Nakanishi, Yu-Te Wang, Tzyy-Ping Jung, John K Zao, Yu-Yi Chien, Alberto Diniz-Filho, Fabio B Daga, Yuan-Pin Lin, Yijun Wang, Felipe A Medeiros
Importance: The current assessment of visual field loss in diseases such as glaucoma is affected by the subjectivity of patient responses and the lack of portability of standard perimeters. Objective: To describe the development and initial validation of a portable brain-computer interface (BCI) for objectively assessing visual function loss. Design, Setting, and Participants: This case-control study involved 62 eyes of 33 patients with glaucoma and 30 eyes of 17 healthy participants...
June 1, 2017: JAMA Ophthalmology
https://www.readbyqxmd.com/read/28412603/impairments-of-balance-stepping-reactions-and-gait-in-people-with-cervical-dystonia
#15
Christopher Barr, Rhiannon Barnard, Lauren Edwards, Sheila Lennon, Lynley Bradnam
BACKGROUND: Impaired balance is common in neurological disorders. Cervical dystonia is a neurological movement disorder affecting the neck. The effect of this aberrant head posture on physical function is unknown. OBJECTIVES: To compare balance, mobility, gait and stepping reactions between ten people with cervical dystonia and ten control adults. METHODS: Spatiotemporal gait parameters and walking speed were assessed using a computerised walkway...
April 4, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28411734/hri-usability-evaluation-of-interaction-modes-for-a-teleoperated-agricultural-robotic-sprayer
#16
George Adamides, Christos Katsanos, Yisrael Parmet, Georgios Christou, Michalis Xenos, Thanasis Hadzilacos, Yael Edan
Teleoperation of an agricultural robotic system requires effective and efficient human-robot interaction. This paper investigates the usability of different interaction modes for agricultural robot teleoperation. Specifically, we examined the overall influence of two types of output devices (PC screen, head mounted display), two types of peripheral vision support mechanisms (single view, multiple views), and two types of control input devices (PC keyboard, PS3 gamepad) on observed and perceived usability of a teleoperated agricultural sprayer...
July 2017: Applied Ergonomics
https://www.readbyqxmd.com/read/28410476/fear-reactivity-to-cognitive-dyscontrol-via-novel-head-mounted-display-perceptual-illusion-exercises
#17
Daniel W Capron, Aaron M Norr, Brian J Albanese, Norman B Schmidt
BACKGROUND: Anxiety sensitivity cognitive concerns (ASCC), refer to fears of mental catastrophe or losing control over mental processes. Recent findings show that ASCC are related to suicide risk, mood disorders and trauma-related disorders. Using controlled experimental psychopathology paradigms could be one heretofore unutilized method of increasing understanding of ASCC. Our goal was to test fear reactivity to four head-mounted display perceptual illusion challenges designed to bring on feelings of cognitive dyscontrol (i...
August 1, 2017: Journal of Affective Disorders
https://www.readbyqxmd.com/read/28387689/multisensory-control-of-a-straight-locomotor-trajectory
#18
Maxim Hanna, Joyce Fung, Anouk Lamontagne
Locomotor steering is contingent upon orienting oneself spatially in the environment. When the head is turned while walking, the optic flow projected onto the retina is a complex pattern comprising of a translational and a rotational component. We have created a unique paradigm to simulate different optic flows in a virtual environment. We hypothesized that non-visual (vestibular and somatosensory) cues are required for proper control of a straight trajectory while walking. This research study included 9 healthy young subjects walking in a large physical space (40×25m2) while the virtual environment is viewed in a helmet-mounted display...
2017: Journal of Vestibular Research: Equilibrium & Orientation
https://www.readbyqxmd.com/read/28380953/compact-see-through-3d-head-mounted-display-based-on-wavefront-modulation-with-holographic-grating-filter
#19
Qiankun Gao, Juan Liu, Xinhui Duan, Tao Zhao, Xin Li, Peilin Liu
A compact see-through three-dimensional head-mounted display (3D-HMD) is proposed and investigated in this paper. Two phase holograms are analytically extracted from the object wavefront and uploaded on different zones of the spatial light modulator (SLM). A holographic grating is further used as the frequency filter to couple the separated holograms together for wavefront modulation. The developed preliminary prototype has a simple optical facility and a compact structure (133.8mm × 40.4mm × 35.4mm with a 47...
April 3, 2017: Optics Express
https://www.readbyqxmd.com/read/28378077/new-dimensions-in-surgical-training-immersive-virtual-reality-laparoscopic-simulation-exhilarates-surgical-staff
#20
Tobias Huber, Markus Paschold, Christian Hansen, Tom Wunderling, Hauke Lang, Werner Kneist
INTRODUCTION: Virtual reality (VR) and head mount displays (HMDs) have been advanced for multimedia and information technologies but have scarcely been used in surgical training. Motion sickness and individual psychological changes have been associated with VR. The goal was to observe first experiences and performance scores using a new combined highly immersive virtual reality (IVR) laparoscopy setup. METHODS: During the study, 10 members of the surgical department performed three tasks (fine dissection, peg transfer, and cholecystectomy) on a VR simulator...
April 4, 2017: Surgical Endoscopy
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