Variation of the ankle motion with the pivot-point position as predicted by a spherical model of the joint

Nicola Sancisi, Fabrizio Nardini, Vincenzo Parenti-Castelli, Claudio Belvedere, Alberto Leardini

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Recent studies proved that the ankle unloaded motion is nearly spherical and can be accurately modeled by one degree-of-freedom spatial spherical mechanisms. Starting from relevant experimental data measured on nine specimens, the global optimal pivot-point (PP) position, i.e., the center of this spherical motion, is obtained in this study and the effect on ankle motion of the changing position of this PP is analyzed.

Original languageEnglish
Article number1540039
JournalJournal of Mechanics in Medicine and Biology
Issue number2
Publication statusPublished - Apr 25 2015


  • Ankle joint
  • Passive motion
  • Pivot-point (PP)
  • Sensitivity
  • Spatial spherical mechanism

ASJC Scopus subject areas

  • Biomedical Engineering

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