Hi Biomechanics geeks,
I am looking for a scientific method to estimate the knee joint centre that does not require the medial condyle marker or an extra trial (functional methods).
The marker set for the lower limbs is the following (see attached file. Note: KneeOut marker is the marker placed on the lateral condyle of the femur. The ones on the thigh and femur are placed more "randomly" on the anterior part of the segments).
We are calculating all the joints based on one frame during a static trial.
Right now, I am building a coordinate system. The primary axis is an anterior axis based on the foot orientation using the HeelBack and Forefoot2 markers. The second axis is a pure vertical axis (0, 0, 1) assuming Z is the vertical component. The origin of this coordinate system is placed at the KneeOut marker. I then applied an offset on the medial axis to place the knee joint centre based on the length of the shin (measured between KneeOut and AnkleOut)
My method is very empirical and would like to find a scientific method if it exists.
Do you have papers about methods that can fit my requirements?
Thank you very much
Vincent
I am looking for a scientific method to estimate the knee joint centre that does not require the medial condyle marker or an extra trial (functional methods).
The marker set for the lower limbs is the following (see attached file. Note: KneeOut marker is the marker placed on the lateral condyle of the femur. The ones on the thigh and femur are placed more "randomly" on the anterior part of the segments).
We are calculating all the joints based on one frame during a static trial.
Right now, I am building a coordinate system. The primary axis is an anterior axis based on the foot orientation using the HeelBack and Forefoot2 markers. The second axis is a pure vertical axis (0, 0, 1) assuming Z is the vertical component. The origin of this coordinate system is placed at the KneeOut marker. I then applied an offset on the medial axis to place the knee joint centre based on the length of the shin (measured between KneeOut and AnkleOut)
My method is very empirical and would like to find a scientific method if it exists.
Do you have papers about methods that can fit my requirements?
Thank you very much
Vincent
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