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joint position error

Katya Trousset, David Phillips, Andrew Karduna
Proprioception is assessed more often through joint position sense and kinesthesia than force sense. The purpose of this study is to investigate force sense at the shoulder. A total of 12 subjects were recruited. An ipsilateral force reproduction protocol at the shoulder at 50°, 70°, and 90° and 120%, 140%, and 160% baseline torque. Dependent variables were constant error (CE) and root mean square error. An effect was found for load on absolute (p = .001) and normalized CE (p < .001). CE decreased with increased load...
March 9, 2018: Motor Control
Masanobu Kusunoki, Takeshi Kohama, Yoshifumi Yamada, Eiji Fujita, Soichi Okada, Akira Maeda, Nobuo Takeshima
PURPOSE: With a growing proportion of elderly people in the population, the maintenance of activities of daily living (ADLs) in elderly people is crucial to keep medical costs down. We investigated the ADL measurement accuracy of KINECTTM and Kinect Studio. To eliminate the subjectivity of conventional methods, we numerically assessed motions with computer analysis. METHODS: Eighteen actions that repeated "move" and "stationary" phases, including movement of arms, legs, head and torso were measured using KINECTTM ...
March 9, 2018: Disability and Rehabilitation. Assistive Technology
Joseph D Mozingo, Mohsen Akbari Shandiz, Felicia M Marquez, Beth A Schueler, David R Holmes, Cynthia H McCollough, Kristin D Zhao
Model-based tracking, using CT and biplane fluoroscopy, allows highly accurate quantification of glenohumeral motion and changes in the subacromial space. Previous investigators have used custom-built biplane fluoroscopes designed specifically for kinematic applications, which are available at few institutions and require FDA approval prior to clinical use. The aim of this study was to demonstrate the utility of an off-the-shelf clinical biplane fluoroscope for kinematic applications by validating model-based tracking for measurement of glenohumeral motion using an unmodified clinical system...
February 13, 2018: Journal of Biomechanics
Laura Golenia, Marina M Schoemaker, Egbert Otten, Leonora J Mouton, Raoul M Bongers
Inspired by the Developmental Systems perspective, we studied the development of reaching during mid-childhood (5-10 years of age) not just at the performance level (i.e., endpoint movements), as commonly done in earlier studies, but also at the joint angle level. Because the endpoint position (i.e., the tip of the index finger) at the reaching target can be achieved with multiple joint angle combinations, we partitioned variability in joint angles over trials into variability that does not (goal-equivalent variability, GEV) and that does (non-goal-equivalent variability, NGEV) influence the endpoint position, using the Uncontrolled Manifold method...
2018: PloS One
Maria Moutzouri, Nigel Gleeson, Fiona Coutts, Elias Tsepis, Gliatis John
OBJECTIVE: To assess the effects of early self-managed focal sensorimotor training compared to functional exercise training after total knee replacement on functional mobility and sensorimotor function. DESIGN: A single-blind controlled clinical trial. SETTING: University Hospital of Rion, Greece. SUBJECTS: A total of 52 participants following total knee replacement. OUTCOME MEASURES: The primary outcome was the Timed Up and Go Test and the secondary outcomes were balance, joint position error, the Knee Outcome Survey Activities of Daily Living Scale, and pain...
February 1, 2018: Clinical Rehabilitation
Savannah V Wooten, Joseph F Signorile, Sohil S Desai, Amelia K Paine, Kiersten Mooney
OBJECTIVE: Yoga has been shown to improve muscle strength, flexibility, and balance. However, the impact of meditation on dynamic factors such as gait, reactive balance and proprioception has yet to be examined. The purpose of this study was to test if a novel yoga meditation program (YoMed) is as effective as a standard proprioceptive training in improving proprioception, balance and power in older individuals who have fallen. DESIGN: Sixteen older persons were randomly assigned to either the YoMed Group (YM) or Proprioception Training Group (PT)...
February 2018: Complementary Therapies in Medicine
Arturo Bertomeu-Motos, Andrea Blanco, Francisco J Badesa, Juan A Barios, Loredana Zollo, Nicolas Garcia-Aracil
BACKGROUND: End-effector robots are commonly used in robot-assisted neuro-rehabilitation therapies for upper limbs where the patient's hand can be easily attached to a splint. Nevertheless, they are not able to estimate and control the kinematic configuration of the upper limb during the therapy. However, the Range of Motion (ROM) together with the clinical assessment scales offers a comprehensive assessment to the therapist. Our aim is to present a robust and stable kinematic reconstruction algorithm to accurately measure the upper limb joints using only an accelerometer placed onto the upper arm...
February 20, 2018: Journal of Neuroengineering and Rehabilitation
Emily L Bishop, Jessica C Küpper, Ingrid R Fjeld, Gregor Kuntze, Janet L Ronsky
Traditionally the FHA is calculated stepwise between data points (sFHA), requiring down sampling to achieve a sufficiently large step size to minimize error. This paper proposes an alternate FHA calculation approach (rFHA), using a unique reference position to reduce error associated with small rotation angles. This study demonstrated error reduction using the rFHA approach relative to the sFHA approach. Furthermore, the rFHA in the femur is defined at each time point providing a continuous representation of joint motion...
February 15, 2018: Computer Methods in Biomechanics and Biomedical Engineering
Munlika Sremakaew, Gwendolen Jull, Julia Treleaven, Marco Barbero, Deborah Falla, Sureeporn Uthaikhup
BACKGROUND: Impaired cervical joint position sense and balance are associated with neck pain. Specific therapeutic exercise and manual therapy are effective for improving neck pain and functional ability but their effects on joint position sense and balance impairments remain uncertain. Changes in the joint position sense and balance may need to be addressed specifically. The primary objective is to investigate the most effective interventions to improve impaired cervical joint position sense and balance in individuals with neck pain...
February 13, 2018: BMC Musculoskeletal Disorders
Paul Wilkening, Farshid Alambeigi, Ryan J Murphy, Russell H Taylor, Mehran Armand
This paper presents the development and evaluation of concurrent control of a robotic system for less-invasive treatment of osteolytic lesions behind an acetabular implant. This system implements safety constraints including a remote center of motion (RCM), virtual walls, and joint limits while operating through the screw holes of the acetabular implant. The formulated linear constrained optimization problem ensures these constraints are satisfied while maintaining precise control of the tip of a Continuum Dexterous Manipulator (CDM) attached to a positioning robot...
July 2017: IEEE Robotics and Automation Letters
Rayyan Azam Khan, Noman Naseer, Nauman Khalid Qureshi, Farzan Majeed Noori, Hammad Nazeer, Muhammad Umer Khan
BACKGROUND: In this paper, a novel functional near-infrared spectroscopy (fNIRS)-based brain-computer interface (BCI) framework for control of prosthetic legs and rehabilitation of patients suffering from locomotive disorders is presented. METHODS: fNIRS signals are used to initiate and stop the gait cycle, while a nonlinear proportional derivative computed torque controller (PD-CTC) with gravity compensation is used to control the torques of hip and knee joints for minimization of position error...
February 5, 2018: Journal of Neuroengineering and Rehabilitation
Austin J Ramme, Nina D Fisher, Jonathan Egol, Gregory Chang, Jonathan M Vigdorchik
Background: Digital templating systems foster patient-specific measurements for preoperative planning. Questions/Purposes: We aim (1) to verify the accuracy of a templating system, (2) to describe the effects of scaling marker position on the accuracy of digital templating of the hip, and (3) to provide a practical guide for scaling marker position using patient body mass index (BMI). Methods: A scaling sphere was placed in five positions along the anterior-posterior axis of an acetabular implant and pelvis phantom, and x-rays were obtained...
February 2018: HSS Journal: the Musculoskeletal Journal of Hospital for Special Surgery
Cláudio Bastos Heine, Luciano Luporini Menegaldo
Muscle models can be used to estimate muscle forces in motor tasks. Muscle model parameters can be estimated by optimizing cost functions based on error between measured and model-estimated joint torques. This paper is a numerical simulation study addressing whether this approach can accurately identify the parameters of the quadriceps femoris. The simulated identification task is a single joint maximum voluntary knee concentric-eccentric extension in an isokinetic dynamometer, keeping the hip fixed at a neutral position...
January 29, 2018: Medical Engineering & Physics
Rakesh Datta, Sangeeta Khanna
Commanding a military multinational and multilingual healthcare facility can be a formidable task with very little margin for error. The authors were in leadership positions of UNIFIL Hospital, unique in its diversity of both staff and clientele. Experience about the challenges faced and methods adopted to overcome them will be shared. Troops from diverse backgrounds differ in their competency, and also in their attitudinal approach to situations. It is imperative for the medical commanders to identify these differences, and work towards harnessing individual strengths to form a cohesive unit...
October 2017: Medical Journal, Armed Forces India
Jumana Ma'touq, Tingli Hu, Sami Haddadin
A highly accurate human hand kinematics model and identification are proposed. The model includes the five digits and the palm arc based on mapping function between surface landmarks and estimated joint centres of rotation. Model identification was experimentally performed using a motion tracking system. The evaluation of the marker position estimation error, which is on sub-millimetre level across all digits, underlines model quality and accuracy. Noticeably, with the development of this model, we were able to improve various modelling assumptions from literature and found a basic linear relationship between surface and skeleton rotational angles...
January 27, 2018: Computer Methods in Biomechanics and Biomedical Engineering
Yi-Fen Shih, Ya-Fang Lee, Wen-Yin Chen
CONTEXT: Scapular proprioception is a key concern in managing shoulder impingement syndrome (SIS). However, no study has examined the effect of elastic taping on scapular proprioception performance. OBJECTIVE: To investigate the immediate effect of kinesiology taping on scapular reposition accuracy, kinematics and muscle activation in individuals with shoulder impingement syndrome. DESIGN: Randomized controlled study. SETTING: Musculoskeletal laboratory, National Yang-Ming University, Taiwan...
January 24, 2018: Journal of Sport Rehabilitation
Fernando Seco, Antonio R Jiménez
In GPS-denied indoor environments, localization and tracking of people can be achieved with a mobile device such as a smartphone by processing the received signal strength (RSS) of RF signals emitted from known location beacons (anchor nodes), combined with Pedestrian Dead Reckoning (PDR) estimates of the user motion. An enhacement of this localization technique is feasible if the users themselves carry additional RF emitters (mobile nodes), and the cooperative position estimates of a group of persons incorporate the RSS measurements exchanged between users...
January 18, 2018: Sensors
Tomáš Gryc, Petr Stastny, František Zahálka, Wojciech Smółka, Piotr Żmijewski, Artur Gołaś, Marek Zawartka, Tomáš Malý
Golfers with disability are limited in the execution of the full golf swing, but their performance in putting may be comparable because this stroke does not demand significant strength, balance and range of motion. Therefore, the aim of this study was to compare putting performance, kinetic and kinematic consistency between golfers with different disabilities and healthy athletes. The participants consisted of three disabled athletes (perinatal cerebral palsy, multiple sclerosis, below knee lower limb amputee) and three healthy golfers (age 34 ± 4...
December 2017: Journal of Human Kinetics
Leila Ghamkhar, Amir H Kahlaee, Mohammad R Nourbakhsh, Amena Ahmadi, Amir M Arab
OBJECTIVE: The purpose of this study was to compare the relationship between flexion endurance capacity and joint position error in participants with or without chronic neck pain (CNP). METHODS: Sixty-one CNP and 60 asymptomatic volunteers participated in this cross-sectional, case-control, and correlational analysis study. The measured variables included absolute and constant joint repositioning errors in the sagittal and horizontal directions, clinical flexor endurance test score, pain intensity, and neck disability index...
February 2018: Journal of Manipulative and Physiological Therapeutics
Akram Jahjah, Dietmar Seidenspinner, Karl Schüttler, Antonio Klasan, Thomas J Heyse, Dominik Malcherczyk, Bilal Farouk El-Zayat
BACKGROUND: Ankle tape is widely used by athletes to prevent ankle sprain. Although there is growing evidence that ankle tape improve joint position sense, but yet it is not clear even if tape improve joint position sense after muscle fatigue, because fatigue impair joint position sense and raise the risk of ankle sprain. The aim of this study is to examine the effect of ankle tape on joint position sense after local muscle fatigue. METHOD: This trial is a randomized controlled trial...
January 9, 2018: BMC Musculoskeletal Disorders
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