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https://www.readbyqxmd.com/read/28538310/enhancing-digital-video-analysis-of-bar-kinematics-in-weightlifting-a-case-study
#1
Torstein E Dæhlin, Tron Krosshaug, Loren Z F Chiu
Dæhlin, TE, Krosshaug, T, and Chiu, LZF. Enhancing digital video analysis of bar kinematics in weightlifting: a case study. J Strength Cond Res 31(6): 1592-1600, 2017-Weightlifting technique can be objectively assessed from two-dimensional video recordings. Despite its importance, participants' bar trajectories in research involving the snatch or clean exercises are often not reported, potentially due to the time required to digitize video. The purpose of this investigation was to evaluate the use of a light-emitting diode (LED)-based marker, digital video, and open-source software to automatically track the bar end during weightlifting exercises...
June 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28538298/quantifying-the-high-speed-running-and-sprinting-profiles-of-elite-female-soccer-players-during-competitive-matches-using-an-optical-player-tracking-system
#2
Jocelyn K Mara, Kevin G Thompson, Kate L Pumpa, Stuart Morgan
Mara, JK, Thompson, KG, Pumpa, KL, and Morgan, S. Quantifying the high-speed running and sprinting profiles of elite female soccer players during competitive matches using an optical player tracking system. J Strength Cond Res 31(6): 1500-1508, 2017-The aim of this study was to determine the high-speed running and sprinting profiles of elite female soccer players during competitive matches using a new Optical Player Tracking system. Eight stationary video cameras were positioned at vantage points surrounding the soccer field so that when each camera view was combined, the entire field could be viewed simultaneously...
June 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28509639/factors-associated-with-simulator-assessed-laparoscopic-surgical-skills-of-veterinary-students
#3
Jessica J Kilkenny, Ameet Singh, Carolyn L Kerr, Deep K Khosa, Boel A Fransson
OBJECTIVE To determine whether simulator-assessed laparoscopic skills of veterinary students were associated with training level and prior experience performing nonlaparoscopic veterinary surgery and other activities requiring hand-eye coordination and manual dexterity. DESIGN Experiment. SAMPLE 145 students without any prior laparoscopic surgical or fundamentals of laparoscopic surgery (FLS) simulator experience in years 1 (n = 39), 2 (34), 3 (39), and 4 (33) at a veterinary college. PROCEDURES A questionnaire was used to collect data from participants regarding experience performing veterinary surgery, playing video games, and participating in other activities...
June 1, 2017: Journal of the American Veterinary Medical Association
https://www.readbyqxmd.com/read/28503159/quantifying-the-degree-of-movement-dissimilarity-between-two-distinct-action-scenarios-an-exploratory-approach-with-procrustes-analysis
#4
Pedro Passos, Tania Campos, Ana Diniz
Game consoles allow subjects to perform movements which are visually similar to the movements performed in 'real' world scenarios. Beyond entertainment, virtual reality devices are being used in several domains: sports performance; motor rehabilitation; training of risk professions. This article presents the Procrustes method to measure the degree of dissimilarity between movements performed in 'real' and 'virtual' scenarios. For this purpose, the 501 darts game and a video darts game played on a console were used...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28499997/enhancement-of-visual-comfort-and-sense-of-presence-on-stereoscopic-3d-images
#5
Heeseok Oh, Jongyoo Kim, Jinwoo Kim, Taewan Kim, Sanghoon Lee, Alan C Bovik
Conventional stereoscopic 3D (S3D) displays do not provide accommodation depth cues of the 3D image or video contents being viewed. The sense of content depths is thus limited to cues supplied by motion parallax (for 3D video), stereoscopic vergence cues created by presenting left and right views to the respective eyes, and other contextual and perspective depth cues. The absence of accommodation cues can induce two kinds of accommodation vergence mismatches (AVM) at the fixation and peripheral points, which can result in severe visual discomfort...
May 9, 2017: IEEE Transactions on Image Processing: a Publication of the IEEE Signal Processing Society
https://www.readbyqxmd.com/read/28490255/developing-a-taxonomy-of-coordination-behaviors-in-nuclear-power-plant-control-rooms-during-emergencies
#6
Dunxing Wang, Qin Gao, Zhizhong Li, Fei Song, Liang Ma
This study aims to develop a taxonomy of coordination behaviors during emergencies in nuclear power plants (NPPs). We summarized basic coordination behaviors from literature in aviation, healthcare, and nuclear field and identified coordination behaviors specific to the nuclear domain by interviewing and surveying control crew operators. The established taxonomy includes seven workflow stages and 24 basic coordination behaviors. To evaluate the reliability and feasibility of the taxonomy, we analyzed 12 videos of operators' training sessions by coding coordination behaviors with the taxonomy and the inter-rater reliability was acceptable...
May 10, 2017: Ergonomics
https://www.readbyqxmd.com/read/28490154/from-exoscope-into-the-next-generation
#7
REVIEW
Kenichi Nishiyama
An exoscope, high-definition video telescope operating monitor system to perform microsurgery has recently been proposed an alternative to the operating microscope. It enables surgeons to complete the operation assistance by visualizing magnified images on a display. The strong points of exoscope are the wide field of view and deep focus. It minimized the need for repositioning and refocusing during the procedure. On the other hand, limitation of magnifying object was an emphasizing weak point. The procedures are performed under 2D motion images with a visual perception through dynamic cue and stereoscopically viewing corresponding to the motion parallax...
May 2017: Journal of Korean Neurosurgical Society
https://www.readbyqxmd.com/read/28472658/releasing-syntaphilin-removes-stressed-mitochondria-from-axons-independent-of-mitophagy-under-pathophysiological-conditions
#8
Mei-Yao Lin, Xiu-Tang Cheng, Prasad Tammineni, Yuxiang Xie, Bing Zhou, Qian Cai, Zu-Hang Sheng
Chronic mitochondrial stress is a central problem associated with neurodegenerative diseases. Early removal of defective mitochondria from axons constitutes a critical step of mitochondrial quality control. Here we investigate axonal mitochondrial response to mild stress in wild-type neurons and chronic mitochondrial defects in Amytrophic Lateral Sclerosis (ALS)- and Alzheimer's disease (AD)-linked neurons. We show that stressed mitochondria are removed from axons triggered by the bulk release of mitochondrial anchoring protein syntaphilin via a new class of mitochondria-derived cargos independent of Parkin, Drp1, and autophagy...
May 3, 2017: Neuron
https://www.readbyqxmd.com/read/28446867/response-properties-of-motor-equivalence-neurons-of-the-primate-premotor-cortex
#9
Eleftherios Neromyliotis, A K Moschovakis
To study the response properties of cells that could participate in eye-hand coordination we trained two macaque monkeys to perform center-out saccades and pointing movements with their right or left forelimb toward visual targets presented on a video display. We analyzed the phasic movement related discharges of neurons of the periarcuate cortex that fire before and during saccades and movements of the hand whether accompanied by movements of the other effector or not. Because such cells could encode an abstract form of the desired displacement vector without regard to the effector that would execute the movement we refer to such cells as motor equivalence neurons (Meq)...
2017: Frontiers in Behavioral Neuroscience
https://www.readbyqxmd.com/read/28421859/water-sensation-during-passive-propulsion-for-expert-and-nonexpert-swimmers
#10
Kenta Kusanagi, Daisuke Sato, Yasuhiro Hashimoto, Norimasa Yamada
This study determined whether expert swimmers, compared with nonexperts, have superior movement perception and physical sensations of propulsion in water. Expert (national level competitors, n = 10) and nonexpert (able to swim 50 m in > 3 styles, n = 10) swimmers estimated the distance propelled in water with their eyes closed. Both groups indicated their subjective physical sensations in the water. For each of two trials, two-dimensional coordinates were obtained from video recordings using the two-dimensional direct linear transformation method for calculating changes in speed...
January 1, 2017: Perceptual and Motor Skills
https://www.readbyqxmd.com/read/28420973/no-overt-effects-of-a-6-week-exergame-training-on-sensorimotor-and-cognitive-function-in-older-adults-a-preliminary-investigation
#11
Madeleine Ordnung, Maike Hoff, Elisabeth Kaminski, Arno Villringer, Patrick Ragert
Several studies investigating the relationship between physical activity and cognition showed that exercise interventions might have beneficial effects on working memory, executive functions as well as motor fitness in old adults. Recently, movement based video games (exergames) have been introduced to have the capability to improve cognitive function in older adults. Healthy aging is associated with a loss of cognitive, as well as sensorimotor functions. During exergaming, participants are required to perform physical activities while being simultaneously surrounded by a cognitively challenging environment...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28419715/a-survey-on-faculty-perspectives-on-the-transition-to-a-biochemistry-course-based-undergraduate-research-experience-laboratory
#12
Paul A Craig
It will always remain a goal of an undergraduate biochemistry laboratory course to engage students hands-on in a wide range of biochemistry laboratory experiences. In 2006, our research group initiated a project for in silico prediction of enzyme function based only on the 3D coordinates of the more than 3800 proteins "of unknown function" in the Protein Data Bank, many of which resulted from the Protein Structure Initiative. Students have used the ProMOL plugin to the PyMOL molecular graphics environment along with BLAST, Pfam, and Dali to predict protein functions...
April 16, 2017: Biochemistry and Molecular Biology Education
https://www.readbyqxmd.com/read/28414047/a-novel-automated-rodent-tracker-art-demonstrated-in-a-mouse-model-of-amyotrophic-lateral-sclerosis
#13
Brett M Hewitt, Moi Hoon Yap, Emma F Hodson-Tole, Aneurin J Kennerley, Paul S Sharp, Robyn A Grant
BACKGROUND: Generating quantitative metrics of rodent locomotion and general behaviours from video footage is important in behavioural neuroscience studies. However, there is not yet a free software system that can process large amounts of video data with minimal user interventions. NEW METHOD: Here we propose a new, automated rodent tracker (ART) that uses a simple rule-based system to quickly and robustly track rodent nose and body points, with minimal user input...
April 13, 2017: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/28359880/coordinated-movement-is-influenced-by-prenatal-light-experience-in-bobwhite-quail-chicks-colinus-virginianus
#14
Starlie C Belnap, Robert Lickliter
Sensory-motor development begins early during embryogenesis and is influenced by sensory experience. Little is known about the prenatal factors that influence the development of motor coordination. Here we investigated whether and to what extent prenatal light experience can influence the development of motor coordination in bobwhite quail hatchlings. Quail embryos were incubated under four light conditions: no light (dark), 2h of total light (2HR), 6h of total light (6HR), and diffused sunlight (controls)...
June 1, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28350283/testing-fine-motor-coordination-via-telehealth-effects-of-video-characteristics-on-reliability-and-validity
#15
Helen M Hoenig, Kristopher Amis, Carol Edmonds, Michelle S Morgan, Lawrence Landerman, Kevin Caves
Background There is limited research about the effects of video quality on the accuracy of assessments of physical function. Methods A repeated measures study design was used to assess reliability and validity of the finger-nose test (FNT) and the finger-tapping test (FTT) carried out with 50 veterans who had impairment in gross and/or fine motor coordination. Videos were scored by expert raters under eight differing conditions, including in-person, high definition video with slow motion review and standard speed videos with varying bit rates and frame rates...
January 1, 2017: Journal of Telemedicine and Telecare
https://www.readbyqxmd.com/read/28344117/learning-the-skills-needed-to-perform-shoulder-arthroscopy-by-simulation
#16
Pierre-Sylvain Marcheix, Guillaume Vergnenegre, François Dalmay, ChristianMabit, Jean-Louis Charissoux
INTRODUCTION: Simulation for arthroscopy helps surgical trainees develop their surgery skills in a safe environment. This teaching technique has become more widespread in recent years because of the need to provide surgeons in training with an alternative to the current methods. We hypothesized that a resident in surgery could acquire the skills needed to perform arthroscopic shoulder surgery by working on a simulator. MATERIAL AND METHODS: The study was conducted over a 4-month period from June to September 2016...
March 23, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/28315945/organization-of-the-reach-and-grasp-in-head-fixed-vs-freely-moving-mice-provides-support-for-multiple-motor-channel-theory-of-neocortical-organization
#17
Ian Q Whishaw, Jamshid Faraji, Jessica Kuntz, Behroo Mirza Agha, Mukt Patel, Gerlinde A S Metz, Majid H Mohajerani
Multiple motor channel (MMC) theory of neocortical organization proposes that complex movements, such as reaching for a food item to eat, are produced by the coordinated action of separate neural channels. For example, the human reach-to-grasp act is mediated by two visuo-parieto-motor cortex channels, one for the reach and one for the grasp. The present analysis asked whether there is a similar organization of reach-and-grasp movements in the mouse. The reach-to-eat movements of the same mice were examined from high-shutter speed, frame-by-frame video analysis in three tasks in which the mice obtained equivalent success scores: when freely-moving reaching for food pellets, when head-fixed reaching for food pellets, and when head-fixed reaching for pieces of pasta...
March 18, 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/28282530/effect-of-early-intervention-on-functional-outcome-at-school-age-follow-up-and-process-evaluation-of-a-randomised-controlled-trial-in-infants-at-risk
#18
Elisa G Hamer, Tjitske Hielkema, Arend F Bos, Tineke Dirks, Siebrigje J Hooijsma, Heleen A Reinders-Messelink, Rivka F Toonen, Mijna Hadders-Algra
BACKGROUND: The long-term effect of early intervention in infants at risk for developmental disorders is unclear. The VIP project (n=46, originally) evaluated by means of a randomised controlled trial the effect of the family centred early intervention programme COPCA (Coping with and Caring for infants with special needs) in comparison to that of traditional infant physiotherapy (TIP). AIMS: To evaluate the effect of early intervention on functional outcome at school age...
March 2017: Early Human Development
https://www.readbyqxmd.com/read/28279851/the-sensitivity-of-shoulder-muscle-and-joint-force-predictions-to-changes-in-joint-kinematics-a-monte-carlo-analysis
#19
Wen Wu, Peter Vee Sin Lee, David C Ackland
Kinematics of the shoulder girdle obtained from non-invasive measurement systems such as video motion analysis, accelerometers and magnetic tracking sensors has been shown to be adversely affected by instrumentation measurement errors and skin motion artefact. The degree to which musculoskeletal model calculations of shoulder muscle and joint loading are influenced by variations in joint kinematics is currently not well understood. A three-dimensional musculoskeletal model of the upper limb was used to evaluate the sensitivity of shoulder muscle and joint force...
March 1, 2017: Gait & Posture
https://www.readbyqxmd.com/read/28275083/unilateral-cerebellothalamic-tract-ablation-in-essential-tremor-by-mri-guided-focused-ultrasound
#20
Sebastian R Schreglmann, Ronald Bauer, Stefan Hägele-Link, Kailash P Bhatia, Parashkev Natchev, Nikolas Wegener, Anita Lebeda, Beat Werner, Ernst Martin, Georg Kägi
OBJECTIVE: To report results of a prospective trial of unilateral transcranial MRI-guided focused ultrasound (MRIgFUS) ablation of the cerebellothalamic tract in essential tremor (ET). METHODS: This was a prospective, uncontrolled, single-center interventional study. Patients with ET fulfilling criteria for interventional therapy received unilateral ablation of the cerebellothalamic tract (CTT) by MRIgFUS. Motor symptoms, manual dexterity, cognition, and quality of life were assessed before intervention and at 48 hours and 1, 3, and 6 months after intervention...
April 4, 2017: Neurology
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