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Table of Contents

The properties of a muscle are organized into panels within the Muscle Editor window, figure below. The Attachment Panel shows all of the attachment points (fixed, via, and moving) that define the muscle path. 

  • The Attachment Panel, displays the fixed, via, and moving muscle points that define the muscle path. 

  • The Parameters Panel contains the force-generating parameters, such as optimal fiber length, pennation angle, and the activation time constants. The exact set of parameters in this panel depends on the type of muscle. There are currently two types of muscle supported in OpenSim. Thelen2003Muscle was developed by Darryl Thelen, Ph.D. [1], and Schutte1993Muscle was developed by Lisa Schutte, Ph.D. [2]. 

  • The Functions Panel contains the force-generating parameters that are functions, such as the force-length curve in a Schutte1993Muscle. Muscles that have no function parameters, such as muscles of type Thelen2003Muscle, do not have a Functions panel. 

  • The Wrapping Panel displays the list of wrap objects that are currently associated with the muscle. 

  • The Current Path Panel shows the list of attachment points that currently define the muscle path.

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