Tweet
Dear Biomch-L readers,
The April 1992 issue of the Journal of Biomechanics has an important paper
from Penn State University on 3-D kinematics of running based on transcuta-
neously implanted marker structures in femur, patella, and tibia. While its
publication has suffered from a rather long delay, there was small chance
that others would do similar work in between. This note is to congratulate
Mario Lafortune and his fellow-volunteers on their work: there are not many
among us who go so far in furthering our field of knowledge!
In the aftermath of the 3-D standardization debate on this list: the model
used by Peter Cavanagh and his students at Penn State's Center for Locomotion
Studies is the Cardanic representation in which only very small amounts of
ab/adduction (floating angle) are reported. Thus, the use of Cardanic angles
in this type of study, with ab/adduction as the floating angle is certainly
appropriate from a differential and error sensitivity point of view.
In a draft proposal from the ISB Standardization and Terminology Committee
circulated at the Zurich Symposium on Clinical Gait Analysis early April, it
is suggested that joint-specific, Cardanic definitions for attitude represen-
tation be proposed by subcommittees to be selected, and that other represen-
tations should be considered only if there is wide-spread support for them.
One of the volunteers of the Penn State study at the time is now chairing the
ISB's Committee on Standardization and Terminology. I look forward to his an-
nouncement of the draft proposal, currently in print for the ISB Newsletter.
hjw.
The April 1992 issue of the Journal of Biomechanics has an important paper
from Penn State University on 3-D kinematics of running based on transcuta-
neously implanted marker structures in femur, patella, and tibia. While its
publication has suffered from a rather long delay, there was small chance
that others would do similar work in between. This note is to congratulate
Mario Lafortune and his fellow-volunteers on their work: there are not many
among us who go so far in furthering our field of knowledge!
In the aftermath of the 3-D standardization debate on this list: the model
used by Peter Cavanagh and his students at Penn State's Center for Locomotion
Studies is the Cardanic representation in which only very small amounts of
ab/adduction (floating angle) are reported. Thus, the use of Cardanic angles
in this type of study, with ab/adduction as the floating angle is certainly
appropriate from a differential and error sensitivity point of view.
In a draft proposal from the ISB Standardization and Terminology Committee
circulated at the Zurich Symposium on Clinical Gait Analysis early April, it
is suggested that joint-specific, Cardanic definitions for attitude represen-
tation be proposed by subcommittees to be selected, and that other represen-
tations should be considered only if there is wide-spread support for them.
One of the volunteers of the Penn State study at the time is now chairing the
ISB's Committee on Standardization and Terminology. I look forward to his an-
nouncement of the draft proposal, currently in print for the ISB Newsletter.
hjw.