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Human Factors: The Journal of the Human Factors and Ergonomics Society
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A Normative Database of Thumb Circumduction In Vivo: Center of Rotation and Range of Motion

Xudong Zhang

University of Illinois at Urbana-Champaign, Urbana, Illinois

Peter Braido

University of Illinois at Urbana-Champaign, Urbana, Illinois

Sang-Wook Lee

University of Illinois at Urbana-Champaign, Urbana, Illinois

Robert Hefner

Caterpillar Inc., Peoria, Illinois

Mark Redden

Caterpillar Inc., Peoria, Illinois

This article reports a systematic research effort aimed at establishing a normative database of thumb circumduction range of motion (ROM) and related kinematic characteristics in vivo while examining the effects of anthropometry, gender, and direction of rotation. Twenty-eight (14 men, 14 women) anthropometrically diverse participants performed maximum voluntary thumb circumductions as the trajectories of the surface markers placed on their thumb landmarks were recorded by an optoelectronic motion capture system. A globographic representation method was employed to model the measured marker trajectories, determining the center of rotation and central reference axes for thumb circumduction. Thumb ROM was quantified using (a) the joint sinuses expressing the thumb orientation change with respect to the reference axes and (b) cone volumes circumscribed by the thumb at the distal phalangeal, interphalangeal, and metacarpophalangeal levels. Data analyses resulted in statistical summaries of the derived kinematic and ROM measures with significant effects identified and regression equations predicting the cone volumes. Potential applications of this research include ergonomic design of hand-operated controls or devices and evaluation of thumb impairments or disorders.

Human Factors: The Journal of the Human Factors and Ergonomics Society, Vol. 47, No. 3, 550-561 (2005)
DOI: 10.1518/001872005774860069
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