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https://www.readbyqxmd.com/read/28528460/sensory-and-motoric-influences-on-attention-dynamics-during-standing-balance-recovery-in-young-and-older-adults
#1
Mark S Redfern, April J Chambers, J Richard Jennings, Joseph M Furman
This study investigated the impact of attention on the sensory and motor actions during postural recovery from underfoot perturbations in young and older adults. A dual-task paradigm was used involving disjunctive and choice reaction time (RT) tasks to auditory and visual stimuli at different delays from the onset of two types of platform perturbations (rotations and translations). The RTs were increased prior to the perturbation (preparation phase) and during the immediate recovery response (response initiation) in young and older adults, but this interference dissipated rapidly after the perturbation response was initiated (<220 ms)...
May 20, 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/28528349/high-wear-resistance-of-femoral-components-coated-with-titanium-nitride-a-retrieval-analysis
#2
Christian Fabry, Carmen Zietz, Axel Baumann, Reinhard Ehall, Rainer Bader
PURPOSE: The objective of this study was to evaluate the in vivo wear resistance of cobalt-chromium femoral components coated with titanium nitride (TiN). Our null hypothesis was that the surface damage and the thickness of the TiN coating do not correlate with the time in vivo. METHODS: Twenty-five TiN-coated bicondylar femoral retrievals with a mean implantation period of 30.7 ± 11.7 months were subjected to an objective surface damage analysis with a semi-quantitative assessment method...
May 20, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/28528005/attentional-load-of-walking-in-children-aged-7-12-and-in-adults
#3
Guillaume Chauvel, Estelle Palluel, Arthur Brandao, Guillaume Barbieri, Vincent Nougier, Isabelle Olivier
The amount of attentional resources necessary to walk in children, and how they evolve during childhood remains unclear. This study examined children's gait parameters in different dual-task conditions. 53 children, divided into two age groups (7-9 and 10-12 years old), and 18 adults walked on a mat in three different cognitive conditions: watching a video (video condition), listening its soundtrack (audio condition), and without any additional task (control condition). Questions were asked at the end of the video and audio conditions to make sure that participants were paying attention to the stimuli...
May 6, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28527794/farmers-preferences-for-automatic-lameness-detection-systems-in-dairy-cattle
#4
T Van De Gucht, W Saeys, A Van Nuffel, L Pluym, K Piccart, L Lauwers, J Vangeyte, S Van Weyenberg
As lameness is a major health problem in dairy herds, a lot of attention goes to the development of automated lameness-detection systems. Few systems have made it to the market, as most are currently still in development. To get these systems ready for practice, developers need to define which system characteristics are important for the farmers as end users. In this study, farmers' preferences for the different characteristics of proposed lameness-detection systems were investigated. In addition, the influence of sociodemographic and farm characteristics on farmers' preferences was assessed...
May 17, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28527230/imaging-and-neuropsychological-correlates-of-white-matter-lesions-in-different-subtypes-of-mild-cognitive-impairment-a-systematic-review
#5
Charlene L M Lam, Jenny Yiend, Tatia M C Lee
BACKGROUND: White matter lesions (WML) are prevalent in older adults. The association between WML and cognition in different subtypes of Mild Cognitive Impairment (MCI) is inconsistent in the literature. OBJECTVES: We aim to provide a systematic review on the impact of WML in different subtypes of MCI, and discuss the recent findings on white matter plasticity. METHODS: We reviewed peer-reviewed articles from January 2011 to August 2016 and identified 12 studies investigating the association between WML and subtypes of MCI with both neuroimaging and cognitive measures...
May 13, 2017: NeuroRehabilitation
https://www.readbyqxmd.com/read/28527003/the-effects-of-kanizsa-contours-on-temporal-integration-and-attention-in-rapid-serial-visual-presentation
#6
Aytaç Karabay, Elkan G Akyürek
Performance in rapid serial visual presentation tasks has been shown to depend on the temporal integration of target stimuli when they are presented in direct succession. Temporal target integration produces a single, combined representation of visually compatible stimuli, which is comparatively easy to identify. It is currently unknown to what extent target compatibility affects this perceptual behavior, because it has not been studied systematically to date. In the present study, the effects of compatibility on temporal integration and attention were investigated by manipulating the Gestalt properties of target features...
May 19, 2017: Attention, Perception & Psychophysics
https://www.readbyqxmd.com/read/28526518/clinical-presentation-of-endometriosis-identified-at-interval-laparoscopic-tubal-sterilization-prospective-series-of-465-cases
#7
Marion Tissot, Lise Lecointre, Emilie Faller, Karolina Afors, Chérif Akladios, Alain Audebert
OBJECTIVES: Women seeking sterilization are usually parous and have no major complains, such as pelvic pain. This could be a good model to indirectly assess the prevalence of endometriosis in the general population. Prevalence of endometriosis in women undergoing tubal sterilization by laparoscopy has been assessed in 17 published reports. Results indicate a surprising wide variation of prevalence of endometriosis, ranging from 1.4% to 43.3 %. This clinical study describes the prevalence and clinical presentations of endometriosis identified at interval laparoscopic tubal sterilization, as a close representation of endometriosis in general population...
May 16, 2017: J Gynecol Obstet Hum Reprod
https://www.readbyqxmd.com/read/28524726/objectively-measured-physical-activity-in-brazilians-with-visual-impairment-description-and-associated-factors
#8
Rafael Barbosa Porcellis da Silva, Alexandre Carriconde Marques, Felipe Fossati Reichert
BACKGROUND: Low level of physical activity is a serious health issue in individuals with visual impairment. Few studies have objectively measured physical activity in this population group, particularly outside high-income countries. The aim of this study was to describe physical activity measured by accelerometry and its associated factors in Brazilian adults with visual impairment. METHODS: In a cross-sectional design, 90 adults (18-95 years old) answered a questionnaire and wore an accelerometer for at least 3 days (including one weekend day) to measure physical activity (min/day)...
May 19, 2017: Disability and Rehabilitation
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
#9
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/28523960/the-health-literacy-dyad-the-contribution-of-future-gps-in-england
#10
Oana R Groene, Jane Wills, Nicola Crichton, Gill Rowlands, Rima R Rudd
BACKGROUND: Health literacy studies have primarily focused on the cognitive and social skills of individuals needed to gain access to, understand, and use health information. This area of study is undergoing a paradigm shift with increased attention being paid to the skills of practitioners and an examination of their contribution to the link between literacy and health outcomes. The aim of this study was to describe the health literacy related competencies of General Practice (GP) trainees who will soon be responsible for the clinical encounter...
May 19, 2017: Education for Primary Care
https://www.readbyqxmd.com/read/28523282/comparative-study-of-computational-visual-attention-models-on-two-dimensional-medical-images
#11
Gezheng Wen, Brenda Rodriguez-Niño, Furkan Y Pecen, David J Vining, Naveen Garg, Mia K Markey
Computational modeling of visual attention is an active area of research. These models have been successfully employed in applications such as robotics. However, most computational models of visual attention are developed in the context of natural scenes, and their role with medical images is not well investigated. As radiologists interpret a large number of clinical images in a limited time, an efficient strategy to deploy their visual attention is necessary. Visual saliency maps, highlighting image regions that differ dramatically from their surroundings, are expected to be predictive of where radiologists fixate their gaze...
April 2017: Journal of Medical Imaging
https://www.readbyqxmd.com/read/28523234/the-effect-of-comt-val158met-and-drd2-c957t-polymorphisms-on-executive-function-and-the-impact-of-early-life-stress
#12
Kristel Klaus, Kevin Butler, Simon J Durrant, Manir Ali, Chris F Inglehearn, Timothy L Hodgson, Humberto Gutierrez, Kyla Pennington
INTRODUCTION: Previous research has indicated that variation in genes encoding catechol-O-methyltransferase (COMT) and dopamine receptor D2 (DRD2) may influence cognitive function and that this may confer vulnerability to the development of mental health disorders such as schizophrenia. However, increasing evidence suggests environmental factors such as early life stress may interact with genetic variants in affecting these cognitive outcomes. This study investigated the effect of COMT Val158Met and DRD2 C957T polymorphisms on executive function and the impact of early life stress in healthy adults...
May 2017: Brain and Behavior
https://www.readbyqxmd.com/read/28523216/foresight-beats-hindsight-the-neural-correlates-underlying-motor-preparation-in-the-pro-anti-cue-paradigm
#13
Franziska Emmerling, Felix Duecker, Tom A de Graaf, Teresa Schuhmann, Jos J Adam, Alexander T Sack
BACKGROUND: Human motor behaviors are characterized by both, reactive and proactive mechanisms. Yet, studies investigating the neural correlates of motor behavior almost exclusively focused on reactive motor processes. Here, we employed the pro-/anti-cue motor preparation paradigm to systematically study proactive motor control in an imaging environment. In this paradigm, either pro- or anti-cues are presented in a blocked design. Four fingers (two from each hand) are mapped onto four visual target locations...
May 2017: Brain and Behavior
https://www.readbyqxmd.com/read/28522966/barratt-impulsivity-in-healthy-adults-is-associated-with-higher-gray-matter-concentration-in-the-parietal-occipital-cortex-that-represents-peripheral-visual-field
#14
Jaime S Ide, Hsiang C Tung, Cheng-Ta Yang, Yuan-Chi Tseng, Chiang-Shan R Li
Impulsivity is a personality trait of clinical importance. Extant research focuses on fronto-striatal mechanisms of impulsivity and how executive functions are compromised in impulsive individuals. Imaging studies employing voxel based morphometry highlighted impulsivity-related changes in gray matter concentrations in a wide array of cerebral structures. In particular, whereas prefrontal cortical areas appear to show structural alterations in individuals with a neuropsychiatric condition, the findings are less than consistent in the healthy population...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28520866/more-than-the-verbal-stimulus-matters-visual-attention-in-language-assessment-for-people-with-aphasia-using-multiple-choice-image-displays
#15
Sabine Heuer, Maria V Ivanova, Brooke Hallowell
Purpose: Language comprehension in people with aphasia (PWA) is frequently evaluated using multiple-choice displays: PWA are asked to choose the image that best corresponds to the verbal stimulus in a display. When a nontarget image is selected, comprehension failure is assumed. However, stimulus-driven factors unrelated to linguistic comprehension may influence performance. In this study we explore the influence of physical image characteristics of multiple-choice image displays on visual attention allocation by PWA...
May 17, 2017: Journal of Speech, Language, and Hearing Research: JSLHR
https://www.readbyqxmd.com/read/28515983/a-conceptual-model-for-physical-therapists-treating-athletes-with-protracted-recovery-following-a-concussion
#16
Mark Lundblad
Sports-related concussions are receiving growing attention in healthcare. Most concussions resolve spontaneously with little or no treatment, but twenty percent of concussions take longer than three weeks to resolve. In some cases, symptoms can last for five years following a traumatic brain injury. Physical Therapists have unique skills that can assist patients experiencing protracted recovery. The purpose of this clinical commentary is to describe a new conceptual model that provides a framework for Physical Therapy management of patients with protracted recovery following a sports-related concussion...
April 2017: International Journal of Sports Physical Therapy
https://www.readbyqxmd.com/read/28515441/fluorescence-dynamics-of-the-biosynthesized-cdse-quantum-dots-in-candida-utilis
#17
Li-Jiao Tian, Nan-Qing Zhou, Xian-Wei Liu, Xing Zhang, Ting-Ting Zhu, Ling-Li Li, Wen-Wei Li, Han-Qing Yu
Organisms served as factories of bio-assembly of nanoparticles attracted a lot of attentions due to the safe, economic and environmental-benignity traits, especially the fabrication of the super fluorescence properties quantum dots (QDs). However, information about the developmental dynamics of QDs in living organisms is still lacking. In this work, we synthesized cadmium-selenium (CdSe) QDs in Candida utilis WSH02-08, and then tracked and quantitatively characterized the developmental dynamics (photoactivation, photostable and photobleaching processes) of bio-QDs by translating fluorescence microscopy movies into visual quantitative curve...
May 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28513478/a-gaze-independent-hybrid-bci-based-on-visual-spatial-attention
#18
John M Egan, Gerard M Loughnane, Helen Fletcher, Emma Meade, Edmund C Lalor
OBJECTIVE: Brain-computer interfaces (BCI) use measures of brain activity to convey a user's intent without the need for muscle movement. Hybrid designs, which use multiple measures of brain activity, have been shown to increase the accuracy of BCIs, including those based on EEG signals reflecting covert attention. Our study examined whether incorporating a measure of the P3 response improved the performance of a previously reported attention-based BCI design that incorporates measures of steady-state visual evoked potentials (SSVEP) and alpha band modulations...
May 17, 2017: Journal of Neural Engineering
https://www.readbyqxmd.com/read/28513305/do-sitting-standing-or-treadmill-desks-impact-psychobiological-indicators-of-work-productivity
#19
Nicholas D Gilson, Caitlin Hall, Angela Renton, Norman Ng, William von Hippel
BACKGROUND: This pilot study investigated links between psychobiological indicators of work productivity, prolonged desk sitting, and conditions whereby office workers were able to interrupt sitting using a sit-stand or treadmill desk. METHODS: Twenty participants visited our laboratory and completed their own desk work in counterbalanced sit-only, sit-stand (Varidesk Pro Plus 48(TM)) and sit-walk conditions (Infiniti TR1200-DTS(TM)). Steady state visually evoked potentials (SSVEPs) calculated from electroencephalography recordings during a set task at the end of the workday assessed attentional resource...
May 17, 2017: Journal of Physical Activity & Health
https://www.readbyqxmd.com/read/28513104/novelty-seeking-and-reward-dependence-related-large-scale-brain-networks-functional-connectivity-variation-during-salience-expectancy
#20
Shijia Li, Liliana Ramona Demenescu, Catherine M Sweeney-Reed, Anna Linda Krause, Coraline D Metzger, Martin Walter
A salience network (SN) anchored in the anterior insula (AI) and dorsal anterior cingulate cortex (dACC) plays a key role in switching between brain networks during salience detection and attention regulation. Previous fMRI studies have associated expectancy behaviors and SN activation with novelty seeking (NS) and reward dependence (RD) personality traits. To address the question of how functional connectivity (FC) in the SN is modulated by internal (expectancy-related) salience assignment and different personality traits, 68 healthy participants performed a salience expectancy task using functional magnetic resonance imaging, and psychophysiological interaction analysis (PPI) was conducted to determine salience-related connectivity changes during these anticipation periods...
May 17, 2017: Human Brain Mapping
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