A5044943491- Muscle activation and electromyography studies
- Prosthetics and Rehabilitation Robotics
- Balance, Gait, and Falls Prevention
- Lower Extremity Biomechanics and Pathologies
- Particle Accelerators and Free-Electron Lasers
- Particle accelerators and beam dynamics
- Advanced Sensor and Energy Harvesting Materials
- Cerebral Palsy and Movement Disorders
- Diabetic Foot Ulcer Assessment and Management
- Sports Performance and Training
- Orthopedic Surgery and Rehabilitation
- Foot and Ankle Surgery
- Superconducting Materials and Applications
- Sports injuries and prevention
- Elbow and Forearm Trauma Treatment
- Motor Control and Adaptation
- Shoulder Injury and Treatment
- Gait Recognition and Analysis
- Cardiac Arrest and Resuscitation
- Injury Epidemiology and Prevention
- Tendon Structure and Treatment
- Occupational Health and Performance
- Knee injuries and reconstruction techniques
- Shoulder and Clavicle Injuries
- Stroke Rehabilitation and Recovery
University of Oregon
2016-2025
Columbia University
2022
VA Puget Sound Health Care System
2012-2021
St Michael's Hospital
2019
European Synchrotron Radiation Facility
2010-2019
Saint Louis University
2016-2019
Coburg University of Applied Sciences
2019
TRIUMF
2019
Rehabilitation Research and Development Service
2008-2018
University of Washington
2008-2018
Lower-limb amputees expend more energy to walk than non-amputees and have an elevated risk of secondary disabilities. Insufficient push-off by the prosthetic foot may be a contributing factor. We aimed systematically study effect mechanics on gait, gain insight into fundamental design principles. varied single parameter in isolation, energy-storing spring prototype foot, controlled storage return (CESR) observed gait. Subjects walked CESR with three different springs. performed parallel...
Background: Little is known about functional outcomes of ankle arthroplasty compared with arthrodesis. This study pre-surgical and post-surgical gait measures in both patient groups. Methods Eighteen patients end-stage arthritis participated an ongoing longitudinal (pre-surgery, 12 months post-surgery) involving analysis, assessment pain physical function. Outcome included temporal-distance, kinematic kinetic data, the Short Form 36 (SF-36) body score, average daily step count. A mixed...
Myoelectric control algorithms have the potential to detect an amputee's motion intent and allow prosthetic adapt changes in walking mode. The development of a myoelectric mode classifier for transtibial amputees is outlined. signals from four muscles (tibialis anterior, medial gastrocnemius (MG), vastus lateralis, biceps femoris) were recorded five nonamputee subjects over variety modes: level ground at three speeds, ramp ascent/descent, stair ascent/descent. These decomposed into relevant...
In the framework of its upgrade, ESRF is designing a new lattice to replace present double-bend achromat structure. This fulfills following constraints and requirements: It fits in tunnel keeps insertion device source points at same location;Its target horizontal emittance around 150 pm;It electron energy 6 GeV order preserve spectral properties beamlines;It minimizes radiation losses magnet electrical consumption decrease operating costs;The injector complex re-used with minor changes.
The primary footwear components of interest to improve performance are midsole material, weight, and longitudinal bending stiffness. Little is known about the effects varied stiffness across a range running speeds. purpose this study was identify changes in spatiotemporal variables, horizontal ground reaction forces, subjective comfort, metabolic cost at different speeds response Ten highly trained males ran 14, 17 20 km/h shoes with varying (normal 5.9, stiff 10.5 very 17.0 N-m/rad). Ground...
Abstract Wearable sensors and machine learning algorithms are becoming a viable alternative for biomechanical analysis outside of the laboratory. The purpose this work was to estimate gait events from inertial measurement units (IMUs) utilize estimation ground reaction force (GRF) waveforms. Sixteen healthy runners were recruited study, with varied running experience. Force sensing insoles used measure normal foot-shoe forces, providing proxy vertical GRF standard identification events....
Ankle arthritis, like hip and knee has a substantial impact on patient function. Understanding the functional limitations of ankle arthritis may help to stratify treatment strategies.We measured preoperative demographic characteristics, physical function, self-assessed function patients with end-stage identified correlations among these metrics. Participants wore StepWatch 3 Activity Monitor for two weeks completed Musculoskeletal Function Assessment Short Form-36 surveys. Gait kinematics...
Abstract Background Myoelectric control of upper extremity powered prostheses has been used clinically for many years, however this approach not fully developed lower prosthetic devices. With the advent components, potential role myoelectric systems is increasing importance. An understanding muscle activation patterns and their relationship to functional ambulation a vital step in future development control. Unusual knee co-contractions have reported both limbs trans-tibial amputees. It...
Background Stress fractures are injuries caused by repetitive loading during activities such as running. The application of advanced analytical methods machine learning to data from multiple wearable sensors has allowed for predictions biomechanical variables associated with running-related like stress fractures. However, it is unclear if a single sensor can accurately estimate that characterize external running peak vertical ground reaction force (vGRF), impulse, and contact time....
This study introduces a novel method for gait analysis using single inertial measurement unit placed on the sacrum. is valid not only level ground but also incline and decline conditions. The leverages "crackle" function, third derivative of sacral resultant acceleration, to identify right left events. approach particularly effective in capturing initial peak acceleration data during foot impact with ground, often overlooked by other methods. aimed demonstrate method's accuracy identifying...
The incidence of lower extremity injuries in collegiate distance runners is ∼20%. Identification a runner sustaining potential injury remains challenging. This exploratory, cross-institutional study sought to determine whether ground reaction force (GRF) characteristics during steady-state running could identify competitive who would later sustain injuries. Normative boundaries for 10 GRF variables braking and propulsion were established noninjured using median ± scaled absolute deviation. A...