View Full Version : helical axis of motion

Darin Gerlach
03-28-2000, 05:17 AM
Dear Biomech-l subscribers,

I am using Helical Axes of Motion (HAM) to describe motion of bones. I
have multiple HAM vectors with rotations about each vector in space. These
vectors are not coincident and therefore I am not sure how find a single
HAM vector in space that is an average of all the individual vectors and

Secondly, if I have a single HAM vector with a rotation about this vector,
is there a way to break this vector into components so that we can show how
much rotation is about the x, y, and z axes.

If anyone has references or suggestions about how to solve these questions,
please send them to my email address.

Thank you,
Darin Gerlach (dsgerl0@pop.uky.edu)
Orthopaedic Biomechanics Laboratory
University of Kentucky

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