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Kortier Henk G - - 2014
Assessment of hand kinematics is important when evaluating hand functioning. Major drawbacks ofcurrent sensing glove systems are lack of rotational observability in particular directions, labourintensive calibration methods which are sensitive to wear and lack of an absolute hand orientationestimate. We propose an ambulatory system using inertial sensors that can be ...
Lobo-Prat Joan - - 2014
The performance capabilities and limitations of control interfaces for the operation of activemovement-assistive devices remain unclear. Selecting an optimal interface for an application requiresa thorough understanding of the performance of multiple control interfaces. In this study the performance of EMG-, force- and joystick-based control interfaces were assessedin healthy volunteers with ...
Charosky Sebastien S Centre Toulousain du Rachis, Polyclinique du Parc, Toulouse 31 rue des Buchers, 31400, Toulouse, France, - - 2014
Finite element analysis. Pedicle subtraction osteotomy (PSO) is associated with a high rate of mechanical complications and implant failures. The biomechanical reasons for these failures are unclear. Using finite element analysis (FEA): to analyze the biomechanical instability after a PSO, to compare the effect of constructs with different rod contours ...
Andersen Sissel S SS Department of Physics, Chemistry, and Pharmacy, University of Southern Denmark , Campusvej 55, 5230 Odense M, - - 2014
Mechanistic understanding of the translational movements in molecular switches is essential for designing machine-like prototypes capable of following set pathways of motion. To this end, we demonstrated that increasing the station-to-station distance will speed up the linear movements forward and slow down the movements backward in a homologous series of ...
Fesi Jeremy D JD Department of Ophthalmology, McGill University, 687 Pine Avenue West, Montreal, QC, H3A 1A1 Canada. Electronic address: - - 2014
Motion provides animals with fast and robust cues for navigation and object detection. In the first case, stereotyped patterns of optic flow inform a moving observer about the direction and speed of its own movement. In the case of object detection, regional differences in motion allow for the segmentation of ...
Flatter John A JA *Department of Ophthalmology, Medical College of Wisconsin, Milwaukee, Wisconsin; †Department of Biomedical Engineering, Marquette University, Milwaukee, Wisconsin; ‡Department of Ophthalmology, New York Eye and Ear Infirmary, New York, New York; §Icahn School of Medicine at Mount Sinai, New York, New York; ¶Retina Consultants Ltd, Des Plaines, Illinois; and Departments of **Biophysics, and ††Cell Biology, Neurobiology, and Anatomy, Medical College of Wisconsin, Milwaukee, - - 2014
To evaluate outer retinal structural abnormalities in patients with visual deficits after closed-globe blunt ocular trauma. Nine subjects with visual complaints after closed-globe blunt ocular trauma were examined between 1 month after trauma and 6 years after trauma. Spectral domain optical coherence tomography was used to assess the outer retinal ...
Bonnet Cédrick T CT Laboratoire de Neurosciences Fonctionnelles et Pathologies, Universities of Lille, CNRS, Lille, France. Electronic address: - - 2014
In 1996, Winter and colleagues proposed the existence of two postural control mechanisms in both the anteroposterior and mediolateral axes: a bodyweight (loading/unloading) distribution mechanism and a complementary center of pressure location mechanism. To measure the loading/unloading forces under each foot, the feet had to be placed side by side ...
Liang Jing Nong - - 2014
Appropriate magnitude and directional control of foot-forces is required for successful execution of locomotor tasks. Earlier evidence suggested, following stroke, there is a potential impairment in foot-force control capabilities both during stationary force generation and locomotion. The purpose of this study was to investigate the foot-pedal surface interaction force components, ...
Williams E M EM Department of Biology, Buhl Hall, Chatham University, Woodland Road, Pittsburgh, PA 15232, USA. Electronic address: - - 2014
Multiple hominin species used and produced stone tools, and the archaeological record provides evidence that stone tool behaviors intensified among later members of the genus Homo. This intensification is widely thought to be the product of cognitive and anatomical adaptations that enabled later Homo taxa to produce stone tools more ...
Wang Zhongyuan Z Institute of Bio-inspired Structure and Surface Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, PR China; College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, PR - - 2014
Anurans are well known for their jumping abilities, making use of their strong hindlimbs. In contrast, the function of the forelimbs during take-off has rarely been studied. We measured the ground reaction forces exerted by forelimbs and hindlimbs during short jumps in the Dybowski's frog Rana dybowskii. Take-off occurred in ...
Hindman Bradley J BJ From the Department of Anesthesia, University of Iowa Roy J. and Lucille A. Carver College of Medicine, Iowa City, Iowa (B.J.H., R.P.F., M.M.T.); Foundation for Orthopaedic Research and Education, Tampa, Florida (B.G.S.); and Department of Mechanical Engineering, School of Biomedical Engineering, Orthopaedic Bioengineering Research Laboratory, Colorado State University, Fort Collins, Colorado - - 2014
Laryngoscopy and endotracheal intubation in the presence of cervical spine instability may put patients at risk of cervical cord injury. Nevertheless, the biomechanics of intubation (cervical spine motion as a function of applied force) have not been characterized. This study characterized and compared the relationship between laryngoscope force and cervical ...
Jastrzębska Agnieszka D AD a University School of Physical Education , Department of Physiology and Biochemistry , Wrocław , - - 2014
ABSTRACT. The authors examined how force generation repeatability changes as the result of incremental maximal test to volitional exhaustion by well-trained (VO2/kg [mL·kg(-1)·min(-1)] 62.55 ± 5.27) individuals. 13 young biathletes (18.9 ± 1.7 years) performed isometric maximum voluntary contraction (IMVC) and submaximal targeted (98N) pushes against the force transducers by arms: ...
Watanabe Sadanori S Division of Biological Science, Graduate School of Science, Nagoya University, Nagoya 464-8602, - - 2014
Microtubule networks generate various forces, and the forces are applied to microtubule-associated proteins (MAPs). Forth et al. (2014) show in a recent issue of Cell that asymmetric frictional force between MAPs and microtubules leads to directional movement of MAPs along microtubules, providing insight into the mechanism of microtubule network self-organization.
Floría Pablo P 1Department of Sports and Computer Science, Pablo de Olavide University, Seville, Spain 2Biomechanics Research Unit, University of Limerick, Limerick, - - 2014
The aim of this study was to ascertain the differences in kinetic and kinematic profiles between better and poorer performers of the vertical jump within a homogeneous group of trained adults. Fifty rugby players were divided into low scoring (LOW) and high scoring (HIGH) groups based on their performance in ...
Buckthorpe Matthew M Loughborough University, United - - 2014
The study aimed to assess the influence of fatigue induced by repeated high force explosive contractions on explosive and maximal isometric strength of the human knee extensors, and examine the neural (central) and contractile mechanisms for the expected decrement. Eleven healthy untrained males completed 10 sets of voluntary maximal explosive ...
Kwon Soyoung S Department of Physics and Astronomy, Institute of Applied Physics, Seoul National University, Daehak-dong, Gwanak-gu, Seoul 151-747, Korea. - - 2014
The forces resulting from the presence of interfacial liquids have mechanical importance under ambient conditions. For holistic understanding of the liquid-mediated interactions, we combine the force-gradient sensitivity of an atomic force microscope (AFM) with the force measuring capability of a micro-electromechanical force sensor. Simultaneous measurement of the viscoelasticity of the ...
Thawrani Dinesh P DP 1Department of Orthopaedics, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA 2University of Cincinnati, Cincinnati, OH, - - 2014
Study Design. Biomechanical study in a porcine modelObjective. To determine whether transverse process hooks (TPH) placed at the proximal end of a long posterior spinal fusion construct provide a more gradual transition to normal motion of the adjacent cephalad motion segment compared to an all pedicle screw construct (APS).Summary of ...
Masumoto Junya J The Joint Graduate School in Science of School Education, Hyogo University of Teacher Education, Kato, - - 2014
If two people row a boat, they often call to each other to synchronize their strokes. It is anticipated that such a call promotes periodic joint action. The present study thus examined the effects of speech on both complementary and synchronous strategies in joint action using the same task as ...
Salcher Rolf R Dept. of Otolaryngology and Inst. of Audioneurotechnology (VIANNA), Medical University Hannover, Hannover, - - 2014
Mechanical stimulation of the round window (RW) of the cochlea is successfully done with the Vibrant Soundbridge (Med-El), but clinical outcomes show a substantial degree of variability. One source of variability is variation in the pre-load static force applied by the stimulator to the round window (Maier et al., 2013), ...
Fabry Christian C Biomechanics and Implant Technology Research Laboratory, Department of Orthopaedics, University Medicine Rostock, Rostock, - - 2014
The increased jump distance against dislocation and the large range of motion due to the enlarged effective head diameter substantiate the use of dual-mobility systems in cases of total hip joint instability. For this type of total hip endoprostheses, an eccentric design of the outer bearing is assumed in order ...
Heed Tobias T Biological Psychology and Neuropsychology, Faculty of Psychology and Human Movement Science, University of Hamburg, Germany. Electronic address: - - 2014
The constraints that guide bimanual movement coordination are informative about the processing principles underlying movement planning in humans. For example, symmetry relative to the body midline benefits finger and hand movements independent of hand posture. This symmetry constraint has been interpreted to indicate that movement coordination is guided by a ...
Baravieira Paula Belini PB Bioengineering Graduate Program EESC/FMRP/IQSC, University of São Paulo, Sao Carlos, São Paulo, Brazil. Electronic address: - - 2014
To compare high-speed videoendoscopy (HSV) and digital kymography (DKG) in the vocal fold vibration analysis of normophonic women with no vocal fold abnormalities. Prospective study comparing quantitative parameters extracted by HSV and DKG. Eighteen normophonic women whose age ranged from 18 to 45 years participated in the study. The procedures comprised ...
Atallah L L Hamlyn Centre for Robotic Surgery, Institute of Global Health Innovation, Imperial College London, London, - - 2014
Measuring gait asymmetry is an important feature when characterizing functional imbalance between limbs. This could be due to pathologies, such as osteoarthritis, stroke, or associated with the effects of surgeries such as hip arthroplasty. Generally, the study of asymmetry or imbalance has required the use of a gait lab or ...
Ruangchainikom Monchai M 1Department of Orthopaedic Surgery, University of California, Los Angeles, Los Angeles, CA 2Department of Orthopaedic Surgery, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, - - 2014
Study Design. Retrospective analysis of kinematic magnetic resonance images (kMRI)Objective. To provide baseline data on the segmental angular and translational motion of the degenerated cervical spine by subtype of kyphotic cervical deformity and to elucidate the relationship between motion and degree of spinal cord compression.Summary of Background Data. Kyphotic deformities ...
De Sá Teixeira Nuno - - 2014
The spatial memory for the last position occupied by a moving target is usually displaced forward in the direction of motion. Interpreted as a mental analogue of physical momentum, this phenomenon was coined representational momentum (RM). As momentum is given by the product of an object's velocity and mass, both ...
Vieira Edgar Ramos ER Department of Physical Therapy, Florida International University, Miami, FL, - - 2014
Stability and balance are fundamental during static and dynamic activities. The effects of wearing rocker bottom sole (RBS) shoes on the limits of stability (LOS) and adaptation to wearing RBS shoes need to be investigated. The objectives of this study were to evaluate the LOS when wearing RBS shoes, and ...
Chen Chiung-Ling - - 2014
Postural control is organized around a task goal. The two most frequently used types of tasks for postural control research are translational (translation along the anterior-posterior axis) and rotational (rotation in sagittal plane) surface perturbations. These types of perturbations rotate the ankle joint, causing different magnitudes and directions of body ...
Gerber Christian C Department of Orthopaedics, Balgrist University Hospital, Zurich, - - 2014
Shoulders with supraspinatus (SSP) tears are associated with significantly larger critical shoulder angles (CSA) compared to disease-free shoulders. We hypothesized that larger CSAs increase the ratio of joint shear to joint compression forces (defined as "instability ratio"), requiring substantially increased compensatory supraspinatus loads. A shoulder simulator with simulated deltoid, supraspinatus, ...
Vvedensky V L VL Kurchatov Institute, Kurchatov place 1, 123182 Moscow, Russia, Moscow State University of Psychology and Education, Russia. Electronic address: - - 2014
We measured magnetic cortical responses to self-paced finger movements. Wide frequency band measurements revealed sharp elements of the response wave-shape, and allowed analysis of individual trials. The signal time course was decomposed into three components in the time window from 600ms before to 600ms after the movement. Each component had ...
King Adam C AC Department of Kinesiology, Pennsylvania State University, USA. Electronic address: - - 2014
The present study examined the learning, retention and transfer of task outcome and the frequency-dependent properties of isometric force output dynamics. During practice participants produced isometric force to a moderately irregular target pattern either under a constant or variable presentation. Immediate and delayed retention tests examined the persistence of practice-induced ...
Nilsson Niels Christian NC Aalborg University - - 2014
Walking-In-Place (WIP) techniques make it possible to facilitate relatively natural locomotion within immersive virtual environments that are larger than the physical interaction space. However, in order to facilitate natural walking experiences one needs to know how to map steps in place to virtual motion. This paper describes two within-subjects studies ...
Rose-Henig Alex - - 2014
We introduce the "contrast-contrast asynchrony," a dynamic stimulus configuration that combines elements of the Shapiro contrast asynchrony with elements of the Chubb contrast-contrast illusion. In the contrast-contrast asynchrony, static textured fields surround two textured fields; one surround has high-contrast texture, and the other has low-contrast texture. The contrasts of the ...
White Benjamin M BM Department of Radiation Oncology, University of California, Los Angeles, California 90095 and Biomedical Physics IDP, University of California, Los Angeles, California - - 2014
The purpose of this work is to develop a cardiac-induced lung motion model to be integrated into an existing breathing motion model. The authors' proposed cardiac-induced lung motion model represents the lung tissue's specific response to the subject's cardiac cycle. The model is mathematically defined as a product of a ...
Cox Crystal C Private practice, Wilson, - - 2014
Nickel-titanium closed-coil springs are purported to deliver constant forces over extended ranges of activation and working times. In-vivo studies supporting this claim are limited. The objective of this study was to evaluate changes in force-decay properties of nickel-titanium closed-coil springs after clinical use. Pseudoelastic force-deflection curves for 30 nickel-titanium coil ...
Kalckert Andreas A Brain, Body & Self Laboratory, Department of Neuroscience, Karolinska Institutet, Stockholm Sweden, Retzius väg 8, SE-171 77 Stockholm, Sweden. Electronic address: - - 2014
The rubber hand illusion is a perceptual illusion in which a model hand is experienced as part of one's own body. In the present study we directly compared the classical illusion, based on visuotactile stimulation, with a rubber hand illusion based on active and passive movements. We examined the question ...
Li Rui R Department of Rehabilitation Medicine, the First Hospital of Peking University, Beijing 100034, - - 2014
Low back pain (LBP) is a common clinical problem. Many researchers have demonstrated that LBP disorders have difference in sensory strategies for postural control. Optokinetic stimulation (OKS) of optic flow has been widely applied to study its effect on vision, but has not been applied to LBP. Here we used ...
Palmer Evan M EM Department of Psychology, Wichita State - - 2014
Visual illusions can reveal unconscious representations and processes at work in perception. Here we report a robust illusion that involves the misperception of moving, partially occluded objects. When a dynamically occluded object is seen through 2 misaligned apertures, the object appears misaligned in the direction of the apertures, creating the ...
De Witt John K - - 2014
Crewmembers performing treadmill exercise on the International Space Station must wear a harness with an external gravity replacement force that is created by elastomer bungees. The quantification of the total external force, displacement, stiffness, and force variation is important for understanding the forces applied to the crewmember during typical exercise. ...
Yang Sylvia X M SX Unit of Forensic Anthropology, Department of Forensic Science, University of Copenhagen, Frederik V's Vej 11, PO Box 2713, DK-2100, Copenhagen, - - 2014
Closed circuit television (CCTV) footage is often available from crime scenes and may be used to compare perpetrators with suspects. Usually, the footage comprises incomplete gait cycles at different velocities, making gait pattern identification from crimes difficult. This study investigated the concurrence of joint angles throughout a gait cycle at ...
Varoqui Deborah - - 2014
In incomplete spinal cord injury (iSCI), sensorimotor impairments result in severe limitations to ambulation. To improve walking capacity, physical therapies using robotic-assisted locomotor devices, such as the Lokomat, have been developed. Following locomotor training, an improvement in gait capabilities--characterized by increases in the over-ground walking speed and endurance--is generally observed ...
Malinowska-Borowska Jolanta J Department of Toxicology and Occupational Health Protection, Medical University of Silesia, Public Health Faculty, Katowice, - - 2014
Introduction. Woodcutters' working conditions are difficult due to the presence of numerous occupational hazards. Petrol -fuelled chain saws commonly used in forestry produce vibration, which may lead to the development of non-specific disorders in the upper extremities of the chain saw operator, referred to as hand-arm vibration syndrome (HAVS). The ...
Park Seongjoo S Department of Anesthesiology and Pain Medicine, Seoul National University Bundang Hospital, 166 Gumi-ro, Bundang-gu, Seongnam-si, Gyeonggi-do, 463-802, - - 2014
We measured the angular change from the line of vision to the larynx around the upper incisors under defined laryngoscopic forces and investigated its association with the laryngoscopic view. Laryngoscopy was performed under general anesthesia with muscle paralysis in male patients with a difficult laryngoscopy (DLG, n = 11) and in male ...
Chevutschi Alain A IFMKNF, Loos, - - 2014
The aim of the present study was to evaluate the immediate effects of therapeutic mobilization of the talocrural and subtalar joints on ankle mobility and postural control in elderly subjects. Nineteen subjects (83.1 ± 6 years, 159 ± 1 cm; 56.1 ± 9.7 kg - mean ± standard deviation) participated in this study. The centre of pressure (COP) displacements along the anterior-posterior and ...
Tolly Brian B a School of Medicine and Public Health , University of Wisconsin , Madison , WI , - - 2014
Abstract Weight-bearing activity has been shown to increase bone mineral density. Our purpose was to measure vertical ground reaction forces (GRFs) during cyclocross-specific activities and compute their osteogenic index (OI). Twenty-five healthy cyclocross athletes participated. GRF was measured using pressure-sensitive insoles during seated and standing cycling and four cyclocross-specific activities: ...
Bull Matthew S - - 2014
Enhancing the short-term force precision of atomic force microscopy (AFM) while maintaining excellent long-term force stability would result in improved performance across multiple AFM modalities, including single molecule force spectroscopy (SMFS). SMFS is a powerful method to probe the nanometer-scale dynamics and energetics of biomolecules (DNA, RNA, and proteins). The ...
Slenker Nicholas R NR Kerlan-Jobe Orthopaedic Clinic, Los Angeles, California, - - 2014
BACKGROUND:The interval throwing progression has been part of baseball rehabilitation and conditioning for decades, yet little is known about the upper extremity loads an athlete is subjected to during this progression. HYPOTHESIS:A biomechanical comparison of fastball pitching, variable-effort pitching, and throwing various flat-ground distances will show significant torque differences in ...
Vida Mark D MD McMaster University, 1280 Main Street West, Hamilton, Ontario, L8S 4L8, Canada. Electronic address: - - 2014
Adults use the orientation of people's heads as a cue to the focus of their attention. We examined developmental changes in mechanisms underlying sensitivity to head orientation during childhood. Eight-, 10-, 12-year-olds, and adults were adapted to a frontal face view or a 20° left or right side view before ...
Bravi Riccardo R Department of Clinical and Experimental Medicine, Physiological Sciences Section, University of Florence, Viale Morgagni 63, 50134, Florence, - - 2014
The ability to perform isochronous movements while listening to a rhythmic auditory stimulus requires a flexible process that integrates timing information with movement. Here, we explored how non-temporal and temporal characteristics of an auditory stimulus (presence, interval occupancy, and tempo) affect motor performance. These characteristics were chosen on the basis ...
Senteler Marco M Department of Orthopedics Balgrist, University of Zurich, Zurich, - - 2014
Symptomatic adjacent segment disease (ASD) has been reported to occur in up to 27 % of lumbar fusion patients. A previous study identified patients at risk according to the difference of pelvic incidence and lordosis. Patients with a difference between pelvic incidence and lumbar lordosis >15° have been found to have ...
van de Steeg Chiel C 1VU University - - 2014
Many studies have addressed corticomuscular coherence (CMC), but broad applications are limited by low coherence values and the variability across subjects and recordings. Here we investigated how the use of high-density surface electromyography (HDsEMG) can improve the detection of CMC. Sixteen healthy subjects performed isometric contractions at six low force ...
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