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https://www.readbyqxmd.com/read/29038450/visuo-acoustic-stimulation-that-helps-you-to-relax-a-virtual-reality-setup-for-patients-in-the-intensive-care-unit
#1
Stephan M Gerber, Marie-Madlen Jeitziner, Patric Wyss, Alvin Chesham, Prabitha Urwyler, René M Müri, Stephan M Jakob, Tobias Nef
After prolonged stay in an intensive care unit (ICU) patients often complain about cognitive impairments that affect health-related quality of life after discharge. The aim of this proof-of-concept study was to test the feasibility and effects of controlled visual and acoustic stimulation in a virtual reality (VR) setup in the ICU. The VR setup consisted of a head-mounted display in combination with an eye tracker and sensors to assess vital signs. The stimulation consisted of videos featuring natural scenes and was tested in 37 healthy participants in the ICU...
October 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29024794/brain-computer-interface-with-the-p300-speller-usability-for-disabled-people-with-amyotrophic-lateral-sclerosis
#2
Violaine Guy, Marie-Hélène Soriani, Mariane Bruno, Théodore Papadopoulo, Claude Desnuelle, Maureen Clerc
OBJECTIVES: Amyotrophic lateral sclerosis (ALS), a progressive neurodegenerative disease, restricts patients' communication capacity a few years after onset. A proof-of-concept of brain-computer interface (BCI) has shown promise in ALS and "locked-in" patients, mostly in pre-clinical studies or with only a few patients, but performance was estimated not high enough to support adoption by people with physical limitation of speech. Here, we evaluated a visual BCI device in a clinical study to determine whether disabled people with multiple deficiencies related to ALS would be able to use BCI to communicate in a daily environment...
October 9, 2017: Annals of Physical and Rehabilitation Medicine
https://www.readbyqxmd.com/read/29023550/effects-of-acute-alcohol-ingestion-on-eye-movements-and-cognition-a-double-blind-placebo-controlled-study
#3
Jéssica Bruna Santana Silva, Eva Dias Cristino, Natalia Leandro de Almeida, Paloma Cavalcante Bezerra de Medeiros, Natanael Antonio Dos Santos
Alcohol is one of the most consumed psychoactive substances in the world, and the negative impact related to alcohol use has become a worldwide public health issue. Alcohol is able to affect diffusely several areas of the Central Nervous System, which could impair visual functions, including eye movements, and cognitive processes. The objective of the present study was to investigate the effects of moderate alcohol intake in eyes movements, as an indicator of cognitive processing underlying the visual search in a the Maze task...
2017: PloS One
https://www.readbyqxmd.com/read/29018317/jake%C3%A2-multimodal-data-capture-system-insights-from-an-observational-study-of-autism-spectrum-disorder
#4
Seth L Ness, Nikolay V Manyakov, Abigail Bangerter, David Lewin, Shyla Jagannatha, Matthew Boice, Andrew Skalkin, Geraldine Dawson, Yvette M Janvier, Matthew S Goodwin, Robert Hendren, Bennett Leventhal, Frederick Shic, Walter Cioccia, Gahan Pandina
Objective: To test usability and optimize the Janssen Autism Knowledge Engine (JAKE®) system's components, biosensors, and procedures used for objective measurement of core and associated symptoms of autism spectrum disorder (ASD) in clinical trials. Methods: A prospective, observational study of 29 children and adolescents with ASD using the JAKE system was conducted at three sites in the United States. This study was designed to establish the feasibility of the JAKE system and to learn practical aspects of its implementation...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28975814/biosensing-in-multiple-sclerosis
#5
Andrew Yousef, Soren Jonzzon, Leena Suleiman, Jennifer Arjona, Jennifer S Graves
The goal of using wearable biosensors in multiple sclerosis (MS) is to provide outcome metrics with higher sensitivity to deficits and better inter-test and inter-rater reliability than standard neurological exam bedside maneuvers. A wearable biosensor not only has the potential to enhance physical exams, but also offers the promise of remote evaluations of the patient either at home or with local non-specialist providers. Areas Covered: We performed a structured literature review on the use of wearable biosensors in studies of multiple sclerosis...
October 4, 2017: Expert Review of Medical Devices
https://www.readbyqxmd.com/read/28973321/visual-search-behavior-in-individuals-with-retinitis-pigmentosa-during-level-walking-and-obstacle-crossing
#6
Matthew A Timmis, Jon Allsop, Mohammad Baranian, James Baker, Itay Basevitch, Keziah Latham, Shahina Pardhan, Kjell N van Paridon
Purpose: Investigate the visual search strategy of individuals with retinitis pigmentosa (RP) when negotiating a floor-based obstacle compared with level walking, and compared with those with normal vision. Methods: Wearing a mobile eye tracker, individuals with RP and normal vision walked along a level walkway or walked along the walkway negotiating a floor-based obstacle. In the level walking condition, tape was placed on the floor to act as an object attracting visual attention...
September 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28961443/eye-tracking-to-evaluate-evidence-recognition-in-crime-scene-investigations
#7
Renuka Devi Watalingam, Nicole Richetelli, Jeff B Pelz, Jacqueline A Speir
Crime scene analysts are the core of criminal investigations; decisions made at the scene greatly affect the speed of analysis and the quality of conclusions, thereby directly impacting the successful resolution of a case. If an examiner fails to recognize the pertinence of an item on scene, the analyst's theory regarding the crime will be limited. Conversely, unselective evidence collection will most likely include irrelevant material, thus increasing a forensic laboratory's backlog and potentially sending the investigation into an unproductive and costly direction...
August 23, 2017: Forensic Science International
https://www.readbyqxmd.com/read/28948104/human-agency-beliefs-influence-behaviour-during-virtual-social-interactions
#8
Nathan Caruana, Dean Spirou, Jon Brock
In recent years, with the emergence of relatively inexpensive and accessible virtual reality technologies, it is now possible to deliver compelling and realistic simulations of human-to-human interaction. Neuroimaging studies have shown that, when participants believe they are interacting via a virtual interface with another human agent, they show different patterns of brain activity compared to when they know that their virtual partner is computer-controlled. The suggestion is that users adopt an "intentional stance" by attributing mental states to their virtual partner...
2017: PeerJ
https://www.readbyqxmd.com/read/28932776/reactive-and-anticipatory-looking-in-6-month-old-infants-during-a-visual-expectation-paradigm
#9
Jeffry Quan, Jean-François Bureau, Adam B Abdul Malik, Johnny Wong, Anne Rifkin-Graboi
This article presents data from 278 six-month-old infants who completed a visual expectation paradigm in which audiovisual stimuli were first presented randomly (random phase), and then in a spatial pattern (pattern phase). Infants' eye gaze behaviour was tracked with a 60 Hz Tobii eye-tracker in order to measure two types of looking behaviour: reactive looking (i.e., latency to shift eye gaze in reaction to the appearance of stimuli) and anticipatory looking (i.e., percentage of time spent looking at the location where the next stimulus is about to appear during the inter-stimulus interval)...
October 2017: Data in Brief
https://www.readbyqxmd.com/read/28930987/how-to-build-a-dichoptic-presentation-system-that-includes-an-eye-tracker
#10
Cheng S Qian, Jan W Brascamp
The presentation of different stimuli to the two eyes, dichoptic presentation, is essential for studies involving 3D vision and interocular suppression. There is a growing literature on the unique experimental value of pupillary and oculomotor measures, especially for research on interocular suppression. Although obtaining eye-tracking measures would thus benefit studies that use dichoptic presentation, the hardware essential for dichoptic presentation (e.g. mirrors) often interferes with high-quality eye tracking, especially when using a video-based eye tracker...
September 6, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28900576/comparison-of-saccadic-vector-optokinetic-perimetry-and-standard-automated-perimetry-in-glaucoma-part-i-threshold-values-and-repeatability
#11
Ian C Murray, Antonios Perperidis, Lorraine A Cameron, Alice D McTrusty, Harry M Brash, Andrew J Tatham, Pankaj K Agarwal, Brian W Fleck, Robert A Minns
PURPOSE: We evaluated threshold saccadic vector optokinetic perimetry (SVOP) and compared results to standard automated perimetry (SAP). METHODS: A cross-sectional study was done including 162 subjects (103 with glaucoma and 59 healthy subjects) recruited at a university hospital. All subjects underwent SAP and threshold SVOP. SVOP uses an eye tracker to monitor eye movement responses to stimuli and determines if stimuli have been perceived based on the vector of the gaze response...
September 2017: Translational Vision Science & Technology
https://www.readbyqxmd.com/read/28888155/pupil-response-and-attention-skills-in-down-syndrome
#12
Armando Quetzalcóatl Angulo-Chavira, Octavio García, Natalia Arias-Trejo
Down syndrome (DS) is characterized by attentional problems. Little is known about the neural correlates of attention problems in DS due to difficulties in evaluation. Pupil dilation, associated with an increase in cognitive load and locus coeruleus-noradrenaline system activity in humans, is a neurophysiological measurement that may help to characterize such problems. The aim of this research was to investigate the link between a phasic pupil dilation response and target detection in people with DS, as compared with a control group with typical development (TD) matched by mental age...
September 6, 2017: Research in Developmental Disabilities
https://www.readbyqxmd.com/read/28886720/development-of-an-electrooculogram-based-eye-computer-interface-for-communication-of-individuals-with-amyotrophic-lateral-sclerosis
#13
Won-Du Chang, Ho-Seung Cha, Do Yeon Kim, Seung Hyun Kim, Chang-Hwan Im
BACKGROUND: Electrooculogram (EOG) can be used to continuously track eye movements and can thus be considered as an alternative to conventional camera-based eye trackers. Although many EOG-based eye tracking systems have been studied with the ultimate goal of providing a new way of communication for individuals with amyotrophic lateral sclerosis (ALS), most of them were tested with healthy people only. In this paper, we investigated the feasibility of EOG-based eye-writing as a new mode of communication for individuals with ALS...
September 8, 2017: Journal of Neuroengineering and Rehabilitation
https://www.readbyqxmd.com/read/28879442/comparing-eye-trackers-by-correlating-their-eye-metric-data
#14
Johannes Titz, Agnes Scholz, Peter Sedlmeier
Up to now, the potential of eye tracking in science as well as in everyday life has not been fully realized because of the high acquisition cost of trackers. Recently, manufacturers have introduced low-cost devices, preparing the way for wider use of this underutilized technology. As soon as scientists show independently of the manufacturers that low-cost devices are accurate enough for application and research, the real advent of eye trackers will have arrived. To facilitate this development, we propose a simple approach for comparing two eye trackers by adopting a method that psychologists have been practicing in diagnostics for decades: correlating constructs to show reliability and validity...
September 6, 2017: Behavior Research Methods
https://www.readbyqxmd.com/read/28873936/parent-perception-of-two-eye-gaze-control-technology-systems-in-young-children-with-cerebral-palsy-pilot-study
#15
Petra Karlsson, Margaret Wallen
Eye-gaze control technology enables people with significant physical disability to access computers for communication, play, learning and environmental control. This pilot study used a multiple case study design with repeated baseline assessment and parents' evaluations to compare two eye-gaze control technology systems to identify any differences in factors such as ease of use and impact of the systems for their young children. Five children, aged 3 to 5 years, with dyskinetic cerebral palsy, and their families participated...
2017: Studies in Health Technology and Informatics
https://www.readbyqxmd.com/read/28842388/exergames-encouraging-exploration-of-hemineglected-space-in-stroke-patients-with-visuospatial-neglect-a-feasibility-study
#16
Bernadette C Tobler-Ammann, Elif Surer, Eling D de Bruin, Marco Rabuffetti, N Alberto Borghese, Renato Mainetti, Michele Pirovano, Lia Wittwer, Ruud H Knols
BACKGROUND: Use of exergames can complement conventional therapy and increase the amount and intensity of visuospatial neglect (VSN) training. A series of 9 exergames-games based on therapeutic principles-aimed at improving exploration of the neglected space for patients with VSN symptoms poststroke was developed and tested for its feasibility. OBJECTIVES: The goal was to determine the feasibility of the exergames with minimal supervision in terms of (1) implementation of the intervention, including adherence, attrition and safety, and (2) limited efficacy testing, aiming to document possible effects on VSN symptoms in a case series of patients early poststroke...
August 25, 2017: JMIR Serious Games
https://www.readbyqxmd.com/read/28835810/the-eye-pupil-s-response-to-static-and-dynamic-illusions-of-luminosity-and-darkness
#17
Daniele Zavagno, Luca Tommasi, Bruno Laeng
Pupil diameters were recorded with an eye-tracker while participants observed cruciform patterns of gray-scale gradients that evoked illusions of enhanced brightness (glare) or of enhanced darkness. The illusions were either presented as static images or as dynamic animations which initially appeared as a pattern of filled squares that-in a few seconds-gradually changed into gradients until the patterns were identical to the static ones. Gradients could either converge toward the center, resulting in a central region of enhanced, illusory, brightness or darkness, or oriented toward each side of the screen, resulting in the perception of a peripheral ring of illusory brightness or darkness...
July 2017: I-Perception
https://www.readbyqxmd.com/read/28822717/searching-for-monocular-microsaccades-a-red-hering-of-modern-eye-trackers
#18
Marcus Nyström, Richard Andersson, Diederick C Niehorster, Ignace Hooge
Despite early reports and the contemporary consensus on microsaccades as purely binocular phenomena, recent work has proposed not only the existence of monocular microsaccades, but also that they serve functional purposes. We take a critical look at the detection of monocular microsaccades from a signal perspective, using raw data and a state-of-the-art, video-based eye tracker. In agreement with previous work, monocular detections were present in all participants using a standard microsaccade detection algorithm...
August 23, 2017: Vision Research
https://www.readbyqxmd.com/read/28816519/the-effects-of-exercise-on-a-choice-reaction-time-task-in-individuals-with-post-concussion-syndrome
#19
Stephanie A Ramautar, Alyssa A Prangley, Michael E Cinelli
PURPOSE: To assess cognitive performance differences pre- and post-exercise in individuals without concussion (non-concussed, NC) and individuals with post-concussion syndrome (PCS). METHODS: A total of 30 participants completed a choice reaction time (CRT) task in the form of an iPad application, measuring each individual's decision-making capabilities, while wearing a head-mounted eye tracker system. Participants completed four blocks of testing; the time interval between the first two blocks of trials and the last two blocks of trials was 10 minutes...
August 17, 2017: Brain Injury: [BI]
https://www.readbyqxmd.com/read/28815298/the-interaction-of-pupil-response-with-the-vergence-system
#20
Moritz Feil, Barbara Moser, Mathias Abegg
PURPOSE: A gaze shift from a target at distance to a target at near leads to pupillary constriction. The regulation of this pupillary near response is ill known. We investigated the impact of accommodation, convergence, and proximity on the pupillary diameter. METHODS: We recorded pupil size and vergence eye movements with the use of an infrared eye tracker. We determined the pupillary response in four conditions: (1) after a gaze shift from far to near without accommodation, (2) after a gaze shift from far to near with neither accommodation nor convergence, (3) after accommodation alone, and (4) after accommodation with convergence without a gaze shift to near...
November 2017: Graefe's Archive for Clinical and Experimental Ophthalmology
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