Garner, Brian Alan, 1966-Newman, Patrick S.Baylor University. Dept. of Mechanical Engineering.2006-05-112006-05-1120052006-05-11http://hdl.handle.net/2104/2888Includes bibliographical references (p. 102-107).Researchers have shown that lifting kinematics change predictably with increased load. To test whether these kinematics patterns are intrinsic or voluntary, a computer model was developed to simulate lifting in the sagittal plane. The eight-degree-of-freedom model included the ankle, knee, hip, shoulder, elbow, neck, and two back joints. Strength limits were assigned to model joints according to position-dependent average male data obtained from the literature. Using both forward and inverse dynamics approaches, the model was programmed to lift various loads while tracking lift kinematics measured from a human subject. Simulation results suggest that, contrary to common hypotheses, observed lifting patterns are not dictated by physical law (intrinsic) but are chosen for efficiency and stability (voluntary). In this study, a method for isolating kinematic dependencies is introduced. It is anticipated that the results will help in the understanding of motion perception, lifting technique, and low-back pain.x, 107 ; ill.1701792 bytesapplication/pdfen-USBaylor University theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. Contact librarywebmaster@baylor.edu for inquiries about permission.Human mechanics -- Computer simulation.Kinesiology -- Computer simulation.Mathematical optimization -- Computer programs.Perceptual-motor processes.ThesisWorldwide access