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View Full Version : Re: First historical use of the Center of Pressure in studyinggait and posture



kirtley24
11-09-2009, 01:21 AM
What a fascinating observation, Pierre!

It's true that Herb Elftmann was the first to make a 6 degree of freedom
force platform and describe calculation of the CoP.

Elftman H (1934) A cinematic study of the distribution of pressure in the
human foot. Anat. Rec. 59: 481-487.

But before that, Marey measured it by a pneumatic method - I don't know for
sure, but I suspect he must have measured CoP directly:

http://www.univie.ac.at/cga/history/enlightenment.html

Come to think of it,
Braune and Fischer must have also used it - I think they just estimated it
from film?

Chris
Dr. Chris Kirtley MB ChB, PhD
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On Mon, Nov 9, 2009 at 4:08 PM, Pierre-Brice Wieber <
pierre-brice.wieber@inrialpes.fr> wrote:

> Dear Biomech-l readers,
>
> by pure curiosity, I have been wondering a bit about the history of the use
> of the Center of Pressure when studying human gait and posture. I'm not a
> researcher in biomechanics but in robotics, so I'm not fluent in finding
> proper references in this field. The concept of Center of Pressure seems to
> appear first in ballistics, and I've found aerospace textbooks from the
> 1940s mentioning it although I'm confident it's a far much older concept.
>
> My guess is that this concept hasn't been introduced in biomechanics until
> there was a way to measure it, perhaps not before the advent of "modern"
> force platforms in the 1950s. I couldn't find however references explicitly
> mentioning the center of pressure at that time.
>
> The earliest I could find so far is:
> AN INVESTIGATION OF THE CENTRES OF PRESSURE UNDER THE FOOT WHILE WALKING
> By GRUNDY, BLACKBURN, TOSH, MCLEISH and SMIDT
> In THE JOURNAL OF BONE AND JOINT SURGERY 1975
>
> But I'm sure this can't be the first use of the center of pressure.
>
> Could anybody point me at the definitive reference on this question?
> Thanks a lot,
> Pierre-Brice Wieber.
>
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