John D. Lloyd, PhD, CPE
Board Certified Ergonomist
32824 Michigan Avenue
San Antonio, Florida 33576
Tel: 813-624-8986
Email: DrJohnLloyd@Tampabay.RR.com
Biomechanical Assessment of Trapeze-Bar Repositioning Tasks in Persons with SCI
Abstract: Persons with SCI must learn to perform activities of daily living (ADL) without the functional use of their lower extremities. As such biomechanical loading of the upper extremity during mobility and transfer tasks dramatically increases incidence of musculoskeletal disorders adding to their disability and diminishing independence thereby dramatically affecting their quality of life.
Utilizing VICON optical-reflective motion tracking technology we have recently completed a 3D dynamic biomechanical assessment in which ten male participants with paraplegia performed trapeze bar repositioning tasks in bed. Dynamic external forces were recorded using calibrated force-sensing resistor attached to the trapeze bar. Electromyography data was also captured for bilateral anterior deltoid, pectoralis major, latissimus dorsi and bicep muscle groups.
Findings from this study describe the complex biomechanical processes at the shoulders elbows and wrists during execution of these demanding tasks. Joint moments and torques are computed as a function of whole-body and segmental centers of mass as well as externally applied loads.
Understanding of the biomechanical demands acting on key joints of the upper extremities lends to the development of engineering and/or methodological interventions to minimize the risk of developing musculoskeletal disorders. By reducing secondary disabilities persons with SCI can maintain their independence and quality of life.
Please contact Dr. Lloyd for additional information