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Measuring Moment Arms Using Closed-Loop Force Control With an Elbow Simulator

[+] Author Affiliations
Laurel Kuxhaus, Patrick J. Schimoler, Mark Carl Miller

Allegheny General Hospital, Pittsburgh, PAUniversity of Pittsburgh, Pittsburgh, PA

Jeffrey S. Vipperman, Daniel Budny

University of Pittsburgh, Pittsburgh, PA

Angela M. Flamm, Mark E. Baratz, Patrick J. DeMeo

Allegheny General Hospital, Pittsburgh, PA

Paper No. SBC2007-176513, pp. 649-650; 2 pages
doi:10.1115/SBC2007-176513
From:
  • ASME 2007 Summer Bioengineering Conference
  • ASME 2007 Summer Bioengineering Conference
  • Keystone, Colorado, USA, June 20–24, 2007
  • Conference Sponsors: Bioengineering Division
  • ISBN: 0-7918-4798-5
  • Copyright © 2007 by ASME

abstract

In search of a complete understanding of a joint’s function, one must understand both the anatomic parameters and how the brain controls the joint’s actuation. Accurate measurements of anatomical parameters are critical to non-linear biomechanical modeling and control and also to a clinical understanding of orthopaedic reconstruction. Likewise, new frontiers in the study of neuromuscular control contribute to our understanding of joint structure and function. One approach to study joint function is to use a joint simulator to actuate cadaver limbs. Towards the goals of understanding and improving human elbow joint control, a physiologic elbow joint simulator was previously constructed in our laboratory. It is the first elbow simulator to operate completely under closed-loop control. The closed-loop force control used to study joint mechanics permits measurement of moment arms in cadaveric elbow specimens. We hypothesized that the approach yields comparable results to previously-reported moment arm values.[1]

Copyright © 2007 by ASME
Topics: Force control

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