This study examined whether the radiocarpal and dorsal capsular ligaments limit end-range wrist motion or remain strained during midrange wrist motion. Fibers of these ligaments were modeled in the wrists of 12 subjects over multiple wrist positions that reflect high demand tasks and the dart thrower's motion. We found that many of the volar and dorsal ligaments were within 5% of their maximum length throughout the range of wrist motion. Our finding of wrist ligament recruitment during midrange and end-range wrist motion helps to explain the complex but remarkably similar intersubject patterns of carpal motion.
Subject-Specific Carpal Ligament Elongation in Extreme Positions, Grip, and the Dart Thrower's Motion
Manuscript received May 28, 2014; final manuscript received August 25, 2015; published online September 30, 2015. Assoc. Editor: Zong-Ming Li.
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Rainbow, M. J., Kamal, R. N., Moore, D. C., Akelman, E., Wolfe, S. W., and Crisco, J. J. (September 30, 2015). "Subject-Specific Carpal Ligament Elongation in Extreme Positions, Grip, and the Dart Thrower's Motion." ASME. J Biomech Eng. November 2015; 137(11): 111006. https://doi.org/10.1115/1.4031580
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