Assessment of passive knee stiffness and set point

Document Type

Conference Proceeding

Publication Date

6-29-2012

Abstract

The purpose of this study was to identify values of the nonlinear passive knee joint stiffness, K p, and the passive knee set point angle, θ p, that allow inclusion of a term in the equation of motion that is often overlooked in dynamic models. Five healthy subjects were tested using the "Push-Pull Test" in which the leg shank was allowed to come to static equilibrium at its resting angle, θ FR, pushed to flexion, allowed to return to θ FR, and then pulled to extension. The shank was held motionless for several seconds at 0.2 rad. increments, with the holding angles, θ h, seen in the data as plateaus following each change in angle. Data were analyzed to determine the moment due to passive stiffness at each holding angle, the nonlinear stiffness coefficient over the range of movement, and the unique set point of the passive stiffness. © 2012 IEEE.

Identifier

84862736655 (Scopus)

ISBN

[9781467311410]

Publication Title

2012 38th Annual Northeast Bioengineering Conference Nebec 2012

External Full Text Location

https://doi.org/10.1109/NEBC.2012.6206998

First Page

133

Last Page

134

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