Range of motion analysis system

An assembly for measuring angular displacement of a body joint formed between a first body portion and a connected second body portion of a subject, the apparatus comprising:

• a support linkage comprising a first link pivotally joined to a second link for relative angular displacement therebetween about a pivot axis, the first link having a portion at a selected distance from the pivot axis to receive a force applied to the portion to develop a moment on the first body portion, the first link adapted to be retained for movement with the first body portion and the second link adapted to be retained for movement with the second body portion;
• means for changing the selected distance of the portion from the pivot axis for adjusting the moment applied;
• angular sensing means joined to the support linkage for sensing angular displacement of the second link relative to the first link and providing a representative indication of angular displacement therebetween;
• force sensing means joined to the support linkage for sensing a force applied to the portion of the first link and providing a representative indication of the force applied;
• and
• storing means for storing a selected representative indication of angular displacement, and for storing a selected representative indication of the force applied.

A kit for measuring angular displacement of a body joint formed between a first body portion and a connected second body portion of a subject, the kit comprising:

• a linkage comprising a first linkage portion pivotally joined to a second linkage portion for relative angular displacement therebetween;
• a plurality of support members of different lengths for individual attachment to the first linkage portion, wherein the first linkage portion and a selected support member attached thereto are adapted to be retained for movement with the first body portion and the second linkage portion is adapted to be retained for movement with the second body portion, and wherein the linkage and the selected support member are used to apply a moment on the first body portion by a force applied to the selected support member;
• angular sensing means joined to the linkage for sensing angular displacement of the second linkage portion relative to the first linkage portion and providing a representative indication of angular displacement therebetween;
• and
• force sensing means joined to the linkage for sensing a force applied to the selected support member and providing a representative indication of the force applied.