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https://www.readbyqxmd.com/read/27909799/thyroid-gland-visualization-with-3d-4d-ultrasound-integrated-hands-on-imaging-in-anatomical-dissection-laboratory
#1
John L Carter, Ankura Patel, Gabriel Hocum, Brion Benninger
PURPOSE: In teaching anatomy, clinical imaging has been utilized to supplement the traditional dissection laboratory promoting education through visualization of spatial relationships of anatomical structures. Viewing the thyroid gland using 3D/4D ultrasound can be valuable to physicians as well as students learning anatomy. The objective of this study was to investigate the perceptions of first-year medical students regarding the integration of 3D/4D ultrasound visualization of spatial anatomy during anatomical education...
December 1, 2016: Surgical and Radiologic Anatomy: SRA
https://www.readbyqxmd.com/read/27909413/sex-effects-on-smoking-cue-perception-in-non-smokers-smokers-and-ex-smokers-a-pilot-study
#2
Davide Zanchi, Arthur Brody, Stefan Borgwardt, Sven Haller
INTRODUCTION: Recent neuroimaging research suggests sex-related brain differences in smoking addiction. In the present pilot study, we assessed gender-related differences in brain activation in response to cigarette-related video cues, investigating non-smokers, smokers, and ex-smokers. METHODS: First, we compared 29 females (28.6 ± 5.3) vs. 23 males (31.5 ± 6.4), regardless of current smoking status to assess global gender-related effects. Second, we performed a post hoc analysis of non-smokers (9 females and 8 males), smokers (10 females and 8 males), and ex-smokers (10 females and 7 males)...
2016: Frontiers in Psychiatry
https://www.readbyqxmd.com/read/27909402/upright-perception-and-ocular-torsion-change-independently-during-head-tilt
#3
Jorge Otero-Millan, Amir Kheradmand
We maintain a stable perception of the visual world despite continuous movements of our eyes, head and body. Perception of upright is a key aspect of such orientation constancy. Here we investigated whether changes in upright perception during sustained head tilt were related to simultaneous changes in torsional position of the eyes. We used a subjective visual vertical (SVV) task, modified to track changes in upright perception over time, and a custom video method to measure ocular torsion simultaneously. We tested 12 subjects in upright position, during prolonged (~15 min) lateral head tilts of 20 degrees, and also after the head returned to upright position...
2016: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/27908068/perception-of-music-dynamics-in-concert-hall-acoustics
#4
Jukka Pätynen, Tapio Lokki
Dynamics is one of the principal means of expressivity in Western classical music. Still, preceding research on room acoustics has mostly neglected the contribution of music dynamics to the acoustic perception. This study investigates how the different concert hall acoustics influence the perception of varying music dynamics. An anechoic orchestra signal, containing a step in music dynamics, was rendered in the measured acoustics of six concert halls at three seats in each. Spatial sound was reproduced through a loudspeaker array...
November 2016: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/27901026/perceptual-training-yields-rapid-improvements-in-visually-impaired-youth
#5
Jeffrey B Nyquist, Joseph S Lappin, Ruyuan Zhang, Duje Tadin
Visual function demands coordinated responses to information over a wide field of view, involving both central and peripheral vision. Visually impaired individuals often seem to underutilize peripheral vision, even in absence of obvious peripheral deficits. Motivated by perceptual training studies with typically sighted adults, we examined the effectiveness of perceptual training in improving peripheral perception of visually impaired youth. Here, we evaluated the effectiveness of three training regimens: (1) an action video game, (2) a psychophysical task that combined attentional tracking with a spatially and temporally unpredictable motion discrimination task, and (3) a control video game...
November 30, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27898029/data-driven-multiresolution-camera-using-the-foveal-adaptive-pyramid
#6
Martin González, Antonio Sánchez-Pedraza, Rebeca Marfil, Juan A Rodríguez, Antonio Bandera
There exist image processing applications, such as tracking or pattern recognition, that are not necessarily precise enough to maintain the same resolution across the whole image sensor. In fact, they must only keep it as high as possible in a relatively small region, but covering a wide field of view. This is the aim of foveal vision systems. Briefly, they propose to sense a large field of view at a spatially-variant resolution: one relatively small region, the fovea, is mapped at a high resolution, while the rest of the image is captured at a lower resolution...
November 26, 2016: Sensors
https://www.readbyqxmd.com/read/27895577/fus1-ko-mouse-as-a-model-of-oxidative-stress-mediated-sporadic-alzheimer-s-disease-circadian-disruption-and-long-term-spatial-and-olfactory-memory-impairments
#7
Guillermo Coronas-Samano, Keeley L Baker, Winston J T Tan, Alla V Ivanova, Justus V Verhagen
Insufficient advances in the development of effective therapeutic treatments of sporadic Alzheimer's Disease (sAD) to date are largely due to the lack of sAD-relevant animal models. While the vast majority of models do recapitulate AD's hallmarks of plaques and tangles by virtue of tau and/or beta amyloid overexpression, these models do not reflect the fact that in sAD (unlike familial AD) these genes are not risk factors per se and that other mechanisms like oxidative stress, metabolic dysregulation and inflammation play key roles in AD etiology...
2016: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/27893253/perception-of-visual-tactile-colocation-in-the-first-year-of-life
#8
Livia Freier, Luke Mason, Andrew J Bremner
An ability to perceive tactile and visual stimuli in a common spatial frame of reference is a crucial ingredient in forming a representation of one's own body and the interface between bodily and external space. In this study, the authors investigated young infants' abilities to perceive colocation between tactile and visual stimuli presented on the hands. They examined infants' visual preferences for spatially congruent and incongruent visual-tactile events across two age groups (6 months and 10-months). They observed increased duration of looking to incongruent stimuli displays in both age groups, indicating that infants from at least 6 months of age demonstrate the ability to determine whether simultaneously presented visual-tactile perceptual events are colocated or not...
December 2016: Developmental Psychology
https://www.readbyqxmd.com/read/27893077/a-general-account-of-peripheral-encoding-also-predicts-scene-perception-performance
#9
Krista A Ehinger, Ruth Rosenholtz
People are good at rapidly extracting the "gist" of a scene at a glance, meaning with a single fixation. It is generally presumed that this performance cannot be mediated by the same encoding that underlies tasks such as visual search, for which researchers have suggested that selective attention may be necessary to bind features from multiple preattentively computed feature maps. This has led to the suggestion that scenes might be special, perhaps utilizing an unlimited capacity channel, perhaps due to brain regions dedicated to this processing...
January 1, 2016: Journal of Vision
https://www.readbyqxmd.com/read/27891684/changes-in-visibility-as-a-function-of-spatial-frequency-and-microsaccade-occurrence
#10
Francisco M Costela, Michael B McCamy, Mary Coffelt, Jorge Otero-Millan, Stephen Macknik, Susana Martinez-Conde
Fixational eye movements (FEM), including microsaccades, drift, and tremor, shift our eye position during ocular fixation, producing retinal motion that is thought to help visibility by counteracting neural adaptation to unchanging stimulation. Yet, how each FEM type influences this process is still debated. Recent studies found little to no relationship between microsaccades and visual perception of spatial frequencies (SF), and concluded that any effects microsaccades may have on vision do not extend to the SF domain...
November 27, 2016: European Journal of Neuroscience
https://www.readbyqxmd.com/read/27891196/navigating-abstract-virtual-environment-an-eeg-study
#11
Alireza Mahdizadeh Hakak, Joydeep Bhattacharya, Nimish Biloria, Roy de Kleijn, Fanak Shah-Mohammadi
Perceptions of different environments are different for different people. An abstract designed environment, with a degree of freedom from any visual reference in the physical world requests a completely different perception than a fully or semi-designed environment that has some correlation with the physical world. Maximal evidence on the manner in which the human brain is involved/operates in dealing with such novel perception comes from neuropsychology. Harnessing the tools and techniques involved in the domain of neuropsychology, the paper presents nee evidence on the role of pre-central gyrus in the perception of abstract spatial environments...
December 2016: Cognitive Neurodynamics
https://www.readbyqxmd.com/read/27891074/interactive-sonification-of-spontaneous-movement-of-children-cross-modal-mapping-and-the-perception-of-body-movement-qualities-through-sound
#12
Emma Frid, Roberto Bresin, Paolo Alborno, Ludvig Elblaus
In this paper we present three studies focusing on the effect of different sound models in interactive sonification of bodily movement. We hypothesized that a sound model characterized by continuous smooth sounds would be associated with other movement characteristics than a model characterized by abrupt variation in amplitude and that these associations could be reflected in spontaneous movement characteristics. Three subsequent studies were conducted to investigate the relationship between properties of bodily movement and sound: (1) a motion capture experiment involving interactive sonification of a group of children spontaneously moving in a room, (2) an experiment involving perceptual ratings of sonified movement data and (3) an experiment involving matching between sonified movements and their visualizations in the form of abstract drawings...
2016: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/27889815/modulating-adaptation-to-emotional-faces-by-spatial-frequency-filtering
#13
Giulia Prete, Bruno Laeng, Luca Tommasi
In four experiments, we investigated the presence and strength of perceptual aftereffects to emotional faces, using spatial frequency filtering to manipulate awareness of emotional content. We presented angry and happy faces as adapters and used a control condition without adaptation. Participants were subsequently requested to judge the friendliness level of a neutral target face. We confirmed the well-known aftereffect for unfiltered emotional faces in Experiment 1. In the experiment, friendliness judgments were greater for the angry than the happy or the control condition...
November 26, 2016: Psychological Research
https://www.readbyqxmd.com/read/27885583/using-gis-mapping-to-target-public-health-interventions-examining-birth-outcomes-across-gis-techniques
#14
E L MacQuillan, A B Curtis, K M Baker, R Paul, Y O Back
With advances in spatial analysis techniques, there has been a trend in recent public health research to assess the contribution of area-level factors to health disparity for a number of outcomes, including births. Although it is widely accepted that health disparity is best addressed by targeted, evidence-based and data-driven community efforts, and despite national and local focus in the U.S. to reduce infant mortality and improve maternal-child health, there is little work exploring how choice of scale and specific GIS visualization technique may alter the perception of analyses focused on health disparity in birth outcomes...
November 24, 2016: Journal of Community Health
https://www.readbyqxmd.com/read/27882594/-cuts-in-action-a-high-density-eeg-study-investigating-the-neural-correlates-of-different-editing-techniques-in-film
#15
Katrin S Heimann, Sebo Uithol, Marta Calbi, Maria A Umiltà, Michele Guerra, Vittorio Gallese
In spite of their striking differences with real-life perception, films are perceived and understood without effort. Cognitive film theory attributes this to the system of continuity editing, a system of editing guidelines outlining the effect of different cuts and edits on spectators. A major principle in this framework is the 180° rule, a rule recommendation that, to avoid spectators' attention to the editing, two edited shots of the same event or action should not be filmed from angles differing in a way that expectations of spatial continuity are strongly violated...
November 24, 2016: Cognitive Science
https://www.readbyqxmd.com/read/27882456/action-potential-influences-spatial-perception-evidence-for-genuine-top-down-effects-on-perception
#16
Jessica K Witt
The action-specific account of spatial perception asserts that a perceiver's ability to perform an action, such as hitting a softball or walking up a hill, impacts the visual perception of the target object. Although much evidence is consistent with this claim, the evidence has been challenged as to whether perception is truly impacted, as opposed to the responses themselves. These challenges have recently been organized as six pitfalls that provide a framework with which to evaluate the empirical evidence...
November 23, 2016: Psychonomic Bulletin & Review
https://www.readbyqxmd.com/read/27876510/scene-perception-in-age-related-macular-degeneration-effect-of-spatial-frequencies-and-contrast-in-residual-vision
#17
Carole Peyrin, Stephen Ramanoël, Alexia Roux-Sibilon, Sylvie Chokron, Ruxandra Hera
Age-related macular degeneration (AMD) is characterized by a central vision loss. Here, we investigated the ability of AMD patients to process the spatial frequency content of scenes in their residual vision, depending of the luminance contrast level. AMD patients and normally-sighted elderly participants (controls) performed a categorization task involving large scenes (outdoors vs. indoors) filtered in low spatial frequencies (LSF), high spatial frequencies (HSF), and non-filtered scenes (NF). Luminance contrast of scenes was equalized between stimuli using a root-mean square (RMS) contrast normalization...
November 19, 2016: Vision Research
https://www.readbyqxmd.com/read/27875192/comparing-cross-sections-and-3d-renderings-for-surface-matching-tasks-using-physical-ground-truths
#18
Andreas J Lind, Stefan Bruckner
Within the visualization community there are some well-known techniques for visualizing 3D spatial data and some general assumptions about how perception affects the performance of these techniques in practice. However, there is a lack of empirical research backing up the possible performance differences among the basic techniques for general tasks. One such assumption is that 3D renderings are better for obtaining an overview, whereas cross sectional visualizations such as the commonly used Multi-Planar Reformation (MPR) are better for supporting detailed analysis tasks...
January 2017: IEEE Transactions on Visualization and Computer Graphics
https://www.readbyqxmd.com/read/27875170/towards-unambiguous-edge-bundling-investigating-confluent-drawings-for-network-visualization
#19
Benjamin Bach, Nathalie Henry Riche, Christophe Hurter, Kim Marriott, Tim Dwyer
In this paper, we investigate Confluent Drawings (CD), a technique for bundling edges in node-link diagrams based on network connectivity. Edge-bundling techniques are designed to reduce edge clutter in node-link diagrams by coalescing lines into common paths or bundles. Unfortunately, traditional bundling techniques introduce ambiguity since edges are only bundled by spatial proximity, rather than network connectivity; following an edge from its source to its target can lead to the perception of incorrect connectivity if edges are not clearly separated within the bundles...
January 2017: IEEE Transactions on Visualization and Computer Graphics
https://www.readbyqxmd.com/read/27874844/making-visible-the-invisible-and-vice-versa-bodies-and-organisational-arrangements-in-the-intensive-care-unit
#20
Roberto Lusardi
BACKGROUND AND AIMS: The effectiveness of the treatments carried out in the Intensive Care Unit (ICU) is guaranteed by a socio-technical ensemble where material resources, scientific knowledge, technological artefacts, social norms, spatial dispositions, and professional practices coexist and constantly interact. This paper intends to penetrate such an ensemble for analysing the moral order produced and maintained in everyday medical practice. METHOD: The results of a case study, carried out in the ICU of a hospital in the north of Italy between 2006 and 2007 are reported...
November 22, 2016: Acta Bio-medica: Atenei Parmensis
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