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Philip Fink
02-25-1997, 11:39 PM
I'm sorry to post this here, but I was unable to find any references in Medline.

Does anyone have a reference for an article in which the the moment of inertia for
the forearm is given for pronation/supination movements?

Also, I was wondering how the values were scaled to subjects. For moments of
inertia in other planes the scaling can be done by a formula like

I=I(reported)*(h(subject)/h(reported))^2*(m(subject)/m(reported))

where I(reported), h(reported), and m(reported) are the moment of inertia, height,
and mass reported in the literature and I, h, and m are the moment of inertia,
height, and mass of the subject. For pronation and supination, and other
movements about a longitudinal axis, it seems like the scaling factor should be
related to the radius of the segment, which should be proportional to something
like m/h. Any thoughts?

Phil Fink
Center for Complex Systems
Florida Atlantic University
fink@walt.ccs.fau.edu