In vivo determination of mechnical properties of the human ulna by means of mechanical impedance tests: Experimental results and improved mathematical model |
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| Authors: | Gerald A. Thompson David Orne Donald R. Young |
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| Affiliation: | (1) Control Data Corporation, Sunnyvale, Cal., USA;(2) Department of Mechanical Engineering, Wayne State University, 48202 Detroit, Mich, USA;(3) Environmental Physiology, NASA Ames Research Centre, Moffett Field, California, USA |
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| Abstract: | An experimental technique and associated apparatus for measuringin vivo the mechanical impedance of the human ulna are described in detail. An electromagnetic shaker is used to apply a steady-state harmonic excitation to the ulna near its mid-span and measurements of the complex driving-point impedance are made. Both stiffness and resonant frequency information, useful in assessing the mechanical integrity of bone, are inferred from the impedance measurements by means of a third-generation mathematical model of the system. Results for three male and two female test subjects are reported. |
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| Keywords: | Human ulna Mechanical impedance Resonant frequency Bone Mathematical modelling |
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