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https://www.readbyqxmd.com/read/29050381/space-based-bias-of-covert-visual-attention-in-complex-regional-pain-syndrome
#1
Janet H Bultitude, Ian Walker, Charles Spence
See Legrain (doi:10.1093/awx188) for a scientific commentary on this article. Some patients with complex regional pain syndrome report that movements of the affected limb are slow, more effortful, and lack automaticity. These symptoms have been likened to the syndrome that sometimes follows brain injury called hemispatial neglect, in which patients exhibit attentional impairments and problems with movements affecting the contralesional side of the body and space. Psychophysical testing of patients with complex regional pain syndrome has found evidence for spatial biases when judging visual targets distanced at 2 m, but not in directions that indicate reduced attention to the affected side...
September 1, 2017: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/29049490/association-of-rhinoplasty-with-perceived-attractiveness-success-and-overall-health
#2
Jason C Nellis, Masaru Ishii, Kristin L Bater, Ira D Papel, Theda C Kontis, Patrick J Byrne, Kofi D O Boahene, Lisa E Ishii
Importance: To date, the impact of rhinoplasty surgery on social perceptions has not been quantified. Objective: To measure the association of rhinoplasty with observer-graded perceived attractiveness, success, and overall health. Design, Setting, and Participants: In a web-based survey, blinded casual observers viewed independent images of 13 unique patient faces before or after rhinoplasty. Delphi method was used to select standardized patient images, confirming appropriate patient candidacy and overall surgical effect...
October 19, 2017: JAMA Facial Plastic Surgery
https://www.readbyqxmd.com/read/29049230/goniosynechialysis-combined-with-cataract-extraction-for-iridoschisis-a-case-report
#3
Zhipeng You, Yan Qin, Guodong Li, Ke Shi
RATIONALE: Iridoschisis is a rare eye disease. In this case report, we described the examination and diagnosis of a case of iridoschisis accompanied by secondary glaucoma. We also observed the effects of treating the patient with a combination of goniosynechialysis and cataract removal. PATIENT CONCERN: A 67-year-old female patient presented with decreased vision in both eyes. An eye examination indicated that visual acuities (VAs) were 20/100 and light perception in the right and left eyes, respectively...
October 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29047842/breaking-camouflage-and-detecting-targets-require-optic-flow-and-image-structure-information
#4
Jing Samantha Pan, Ned Bingham, Chang Chen, Geoffrey P Bingham
Use of motion to break camouflage extends back to the Cambrian [In the Blink of an Eye: How Vision Sparked the Big Bang of Evolution (New York Basic Books, 2003)]. We investigated the ability to break camouflage and continue to see camouflaged targets after motion stops. This is crucial for the survival of hunting predators. With camouflage, visual targets and distracters cannot be distinguished using only static image structure (i.e., appearance). Motion generates another source of optical information, optic flow, which breaks camouflage and specifies target locations...
August 1, 2017: Applied Optics
https://www.readbyqxmd.com/read/29047696/full-reference-quality-assessment-of-stereoscopic-images-by-learning-binocular-visual-properties
#5
Jian Ma, Ping An, Liquan Shen, Kai Li
Stereoscopic imaging technology has been growingly prevalent driven by both the entertainment industry and scientific applications in today's world. But objective quality assessment of stereoscopic images is a challenging task. In this paper, we propose a novel stereoscopic image quality assessment (SIQA) method by jointly considering monocular perception and binocular interaction. As the most significant contribution of this study, binocular perceptual properties of simple and complex cells are considered for full-reference (FR) SIQA...
October 10, 2017: Applied Optics
https://www.readbyqxmd.com/read/29047477/how-daylight-influences-high-order-chromatic-descriptors-in-natural-images
#6
Juan Ojeda, Juan Luis Nieves, Javier Romero
Despite the global and local daylight changes naturally occurring in natural scenes, the human visual system usually adapts quite well to those changes, developing a stable color perception. Nevertheless, the influence of daylight in modeling natural image statistics is not fully understood and has received little attention. The aim of this work was to analyze the influence of daylight changes in different high-order chromatic descriptors (i.e., color volume, color gamut, and number of discernible colors) derived from 350 color images, which were rendered under 108 natural illuminants with Correlated Color Temperatures (CCT) from 2735 to 25,889 K...
July 1, 2017: Applied Optics
https://www.readbyqxmd.com/read/29047031/the-effect-of-phasic-alertness-on-temporal-precision
#7
Qingqing Li, Peiduo Liu, Shunhang Huang, Xiting Huang
Many previous studies have found that there is a close relationship between attention and temporal precision. As a mechanism that regulates the intensity of attention, alertness has beneficial influences on perceptual processing. However, little is known regarding whether and how phasic alertness affects temporal precision. Experiment 1 and Experiment 2 used visual and auditory warning cues in a visual temporal order judgment (TOJ) task and a simultaneity judgment (SJ) task to investigate the phasic alerting effect on temporal precision...
October 18, 2017: Attention, Perception & Psychophysics
https://www.readbyqxmd.com/read/29047030/representational-momentum-and-anisotropies-in-nearby-visual-space
#8
Timothy L Hubbard, Susan E Ruppel
The possibility of anisotropies in visual space in and near the final location of a moving target was examined. Experiments 1 and 2 presented a moving target, and after the target vanished, participants indicated the final location of the leading or trailing edge of the target. Memory for both edges was displaced forward from the actual final locations, and the magnitude of displacement was smaller for the leading edge. Experiments 3 and 4 also presented stationary objects in front of and behind the final location of the target, and participants indicated the location of the nearest or farthest edge of one of the stationary objects...
October 18, 2017: Attention, Perception & Psychophysics
https://www.readbyqxmd.com/read/29046631/development-of-a-bayesian-estimator-for-audio-visual-integration-a-neurocomputational-study
#9
Mauro Ursino, Andrea Crisafulli, Giuseppe di Pellegrino, Elisa Magosso, Cristiano Cuppini
The brain integrates information from different sensory modalities to generate a coherent and accurate percept of external events. Several experimental studies suggest that this integration follows the principle of Bayesian estimate. However, the neural mechanisms responsible for this behavior, and its development in a multisensory environment, are still insufficiently understood. We recently presented a neural network model of audio-visual integration (Neural Computation, 2017) to investigate how a Bayesian estimator can spontaneously develop from the statistics of external stimuli...
2017: Frontiers in Computational Neuroscience
https://www.readbyqxmd.com/read/29046428/spatio-temporal-characteristics-of-retinal-response-to-network-mediated-photovoltaic-stimulation
#10
Elton Ho, Richard Smith, Georges A Goetz, Xin Lei, Ludwig Galambos, Theodore I Kamins, James Harris, Keith Mathieson, Daniel Palanker, Alexander Sher
Subretinal prostheses aim at restoring sight to patients blinded by photoreceptor degeneration using electrical activation of the surviving inner retinal neurons. Today, such implants deliver visual information with low-frequency stimulation, resulting in discontinuous visual percepts. We measured retinal responses to complex visual stimuli delivered at video rate via a photovoltaic subretinal implant and by visible light. Using a multielectrode array to record from retinal ganglion cells (RGCs) in the healthy and degenerated rat retina ex-vivo, we estimated their spatio-temporal properties from the spike-triggered average (STA) responses to photovoltaic binary white noise stimulus with 70μm pixel size at 20Hz frame rate...
October 18, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/29046424/passive-sensorimotor-stimulation-triggers-long-lasting-alpha-band-fluctuations-in-visual-perception
#11
Alice Tomassini, Alessandro D'Ausilio
Movement planning and execution rely on the anticipation and online control of the incoming sensory input. Evidence suggests that sensorimotor processes may synchronize visual rhythmic activity in preparation of action performance. Indeed, we recently reported periodic fluctuations of visual contrast sensitivity which are time-locked to the onset of an intended movement of the arm. However, the origin of the observed visual modulations has so far remained unclear due to the endogenous (and thus temporally undetermined) activation of the sensorimotor system that is associated with voluntary movement initiation...
October 18, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/29044823/the-many-characters-of-visual-alpha-oscillations
#12
Michael S Clayton, Nick Yeung, Roi Cohen Kadosh
A central feature of human brain activity is the alpha rhythm: a 7 - 13 Hz oscillation observed most notably over occipitoparietal brain regions during periods of eyes-closed rest. Alpha oscillations covary with changes in visual processing, and have been associated with a broad range of neurocognitive functions. In this article, we review these associations and suggest that alpha oscillations can be thought to exhibit at least five distinct 'characters': those of the inhibitor, perceiver, predictor, communicator, and stabiliser...
October 17, 2017: European Journal of Neuroscience
https://www.readbyqxmd.com/read/29044675/-oh-my-god-i-can-t-handle-this-trainees-emotional-responses-to-complex-situations
#13
Esther Helmich, Laura Diachun, Radha Joseph, Kori LaDonna, Nelleke Noeverman-Poel, Lorelei Lingard, Sayra Cristancho
CONTEXT: Dealing with emotions is critical for medical trainees' professional development. Taking a sociocultural and narrative approach to understanding emotions, we studied complex clinical situations as a specific context in which emotions are evoked and influenced by the social environment. We sought to understand how medical trainees respond to emotions that arise in those situations. METHODS: In an international constructivist grounded theory study, 29 trainees drew two rich pictures of complex clinical situations, one exciting and one frustrating...
October 16, 2017: Medical Education
https://www.readbyqxmd.com/read/29043973/-aesthetic-perception-of-the-vertical-position-of-the-incisal-edges-of-the-maxillary-lateral-incisors-in-the-smile-arch
#14
Sophie Stolz, François Lefebvre, Yves Bolender, Daniel Kanter
INTRODUCTION: The aim of this study is to assess the attractiveness in the smile arch of different vertical positions of the incisal edges of the maxillary lateral incisors. MATERIAL AND METHODS: A frontal photograph of a Caucasian woman's smile was digitally modified to obtain an image with the incisal edges of the maxillary lateral incisors symmetrically tangent to the smile arch. These incisal edges were then moved vertically by 0.5 mm increments. The value was considered positive for an occlusal shift and negative for a gingival shift...
September 2017: L' Orthodontie Française
https://www.readbyqxmd.com/read/29043679/er-membrane-protein-interactions-using-the-split-ubiquitin-system-sus
#15
Lisa Yasmin Asseck, Niklas Wallmeroth, Christopher Grefen
Protein-protein interactions (PPIs) play fundamental roles in all cellular processes. Especially membrane proteins facilitate a range of important biological functions in stimuli perception, signaling, and transport. Here we describe a detailed protocol for the yeast mating-based Split-Ubiquitin System (mbSUS) to study PPIs of ER membrane proteins in vivo. In contrast to the prominent Yeast Two-Hybrid, mbSUS enables analysis of full-length membrane proteins in their native cellular context. The system is based on the ubiquitin proteasome pathway leading to the release of an artificial transcription factor followed by activation of reporter genes to visualize PPIs...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29042471/measuring-patient-perception-of-quality-in-a-radiology-department-by-adapting-a-standardized-industry-proven-tool
#16
Farouk Dako, Rick Wray, Omer Awan, Rathan M Subramaniam
Introduction: Our study quantitatively measures patient perception of quality and satisfaction in a PET-CT center at the point of care using a psychometrically validated questionnaire, SERVPERF, to guide subsequent quality improvement interventions. SERVPERF is a survey instrument that captures service quality by measuring performance of various services. It has demonstrated reliability and validity across various industries including healthcare, banking, transportation, telecommunication and higher education...
October 17, 2017: Journal of Nuclear Medicine Technology
https://www.readbyqxmd.com/read/29041836/influence-of-visual-clutter-on-the-effect-of-navigated-safety-inspection-a-case-study-in-elevator-installation
#17
Pin-Chao Liao, Xinlu Sun, Mei Liu, Yu-Nien Shih
INTRODUCTION: Navigated safety inspection based on task-specific checklists can increase the hazard detection rate, theoretically interfered by scene complexity. Visual clutter, a proxy of scene complexity, can theoretically impair visual search performance, but its impact on the effect of safety inspection performance remains to be explored for the optimization of navigated inspection. This research aims to explore whether the relationship between working memory and hazard detection rate is moderated by visual clutter...
October 18, 2017: International Journal of Occupational Safety and Ergonomics: JOSE
https://www.readbyqxmd.com/read/29040934/calibration-to-tool-use-during-visually-guided-reaching
#18
Brian Day, Elham Ebrahimi, Leah S Hartman, Christopher C Pagano, Sabarish V Babu
In studying human perception and performance researchers must understand how the body schema is modified to accurately represent one's capabilities when tools are used, as humans use tools that alter their capabilities frequently. The present work tested the idea that calibration is responsible for modifying an embodied action schema during tool use. We investigated calibration in the context of manual activity in near space through a behavioral measure. Participants made blind reaches to various visual distances in pre- and post-test phases using a short tool that did not extend their reach...
October 14, 2017: Acta Psychologica
https://www.readbyqxmd.com/read/29040405/the-balcony-technique-of-breast-augmentation-and-inverted-t-mastopexy-with-an-inferior-dermoglandular-flap
#19
Roy de Vita, Giovanni Zoccali, Ernesto Maria Buccheri
Background: Optimal breast augmentation-mastopexy involves a reliable technique, fast recovery, minimal complications, and aesthetic results that are excellent and enduring. Objectives: The authors sought to determine whether the balcony technique of augmentation-mastopexy was safe and yielded satisfactory long-term outcomes in patients with breast ptosis and hypoplasia. Methods: The authors conducted a retrospective review of 207 patients who underwent subglandular augmentation and inverted-T mastopexy with a customized Wise keyhole resection pattern and an inferior flap...
October 4, 2017: Aesthetic Surgery Journal
https://www.readbyqxmd.com/read/29039769/-their-packaging-has-always-been-like-a-power-a-qualitative-study-of-u-s-smokers-perceptions-of-cigarette-pack-visual-design-features-to-inform-product-regulation
#20
Joseph G L Lee, Paige E Averett, Tiffany Blanchflower, Nunzio Landi, Kyle R Gregory
Cigarette packaging matters to consumer behavior. However, it is less clear which changes to packaging design would be salient for adult smokers. Such information is critically important to regulators in the United States who are charged with reviewing new tobacco products for their impact on population health. In this qualitative study, U.S. adult smokers (n = 33) participated in six telephone-based focus groups in March 2017. Separate groups were comprised of lesbian, gay, and bisexual (LGB) participants; participants with less than four years of post-secondary education; a mix of LGB and straight participants; and, the general population...
October 17, 2017: International Journal of Environmental Research and Public Health
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