Biomechanical Analysis In Upper Extremity During Lifting Tasks

• Main Authors: Long-Hui Chen, 陳榮輝
• Other Authors: You-Li Chou
• Format: Others
• Language: zh-TW
• Published: 1999
• Online Access: http://ndltd.ncl.edu.tw/handle/85601978240802285499

碩士 === 國立成功大學 === 醫學工程研究所 === 87 === "Manual Materials Handling" (M.M.H.) included lifting, carrying, pushing, pulling, lowering and holding. It has been a topic of interest in many fields of research, particularly manual lifting. The primary reason for this interest is the devastating cost and human suffering caused by the severity of M.M.H.-related injuries. The lifting tasks are necessary in our active daily living. One potential hazard in lifting is the related musculo-skeletal injury of upper extremity, especially the wrist. Hence a number of recent studies sought to give recommendations for handles or containers to aid in manual lifting tasks. It is happened to reduce injury efficiently at the every joint of upper extremity . The purpose of this study was to establish the 3-D kinematic and kinetic models of upper limbs. By imaged based motion analysis system, the movement pattern, the force and moment of the shoulder, elbow and wrist joint of eight right-handed male subjects during nine different types box lifting(2 weight: 24, 34kg; 3 weight offset: left, middle, right; 3 handle angles: 0°, 10°, 20°from horizontal) were collected and analyzed. By using the platform force plate on the ground, the ground reaction force all over these different types lifting was also collected and analyzed. The result completely described the 3-D kinematic and kinetic characteristics and real the joint force and moment of upper limbs. The handle angle can effect the joint force and moment of upper limbs, especially the wrist. The center of pressure (COP) calculated from force plate and its locus showed different patterns while different weight offset of box were lifted (COP shifted to left when the weight left offset, and COP shifted to right when the weight right offset).