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Upper limb dynamic mechanical and anatomical properties among assembly operators.

Authors
Sesto-ME; Radwin-RG; Block-WF; Best-TM
Source
Human Factors and Ergonomics Society 47th Annual Meeting. Santa Monica, CA: Human Factors and Ergonomics Society, 2003 Oct; :1265-1268
NIOSHTIC No.
20027120
Abstract
This study investigated upper limb mechanical and anatomical properties in assembly workers. Fourteen male assembly workers were recruited from selected jobs including power hand tool users and non-power hand tool users. Active dynamical mechanical properties of the upper extremity were measured using a free vibration apparatus. All workers underwent a physical examination, magnetic resonance imaging and completed a symptom survey. Employees were categorized as asymptomatic versus symptomatic based on reported forearm symptoms and physical exam findings. Symptomatic individuals had 46% less mechanical stiffness and a 59% less mass moment of inertia of the forearm than the asymptomatic group. Workers were stratified based on power tool use and two of the seven subjects who regularly used power nut runners demonstrated MRI T2 enhancement, which is indicative of muscle edema. T2MRI enhancement was not demonstrated in the seven subjects who did not regularly use power nut runners.
Keywords
Ergonomics; Human-factors-engineering; Worker-health; Work-performance; Work-operations; Work-practices; Work-environment; Workplace-studies; Workplace-monitoring; Statistical-analysis; Posture; Body-mechanics; Hand-tools; Muscles; Musculoskeletal-system; Musculoskeletal-system-disorders; Muscular-disorders; Muscle-tension; Muscle-stress; Muscle-physiology; Muscle-function; Muscle-contraction; Injuries; Injury-prevention; Power-tools; Cumulative-trauma-disorders; Cumulative-trauma; Repetitive-work
Publication Date
20031013
Document Type
Conference/Symposia Proceedings
Funding Amount
387906
Funding Type
Grant
Fiscal Year
2004
NTIS Accession No.
NTIS Price
ISBN No.
0945289227
Identifying No.
Grant-Number-R01-OH-003300
Priority Area
Disease and Injury: Musculoskeletal Disorders of the Upper Extremities
Source Name
Human Factors and Ergonomics Society 47th Annual Meeting
State
WI; WA
Performing Organization
University of Wisconsin, Department of Biomedical Engineering, Madison, WI
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