Hello everyone,
I have been reviewing the ground reaction forces (GRF) analysis and have encountered a few questions that I would greatly appreciate your guidance on. This is only for a gait patient who turns the direction of movement.
Ground Reaction Forces Analysis:
I am analyzing the GRF in the global coordinate system, and the curves seem to align with what is described in the literature. Specifically, the blue curve represents the force in the X-direction (medio-lateral), the orange curve corresponds to the force in the Y-direction (vertical), and the green curve shows the force in the Z-direction (anterior-posterior).
Curve from AnyBody:
Literature curve:
However, as the patient may not always walk in a straight line and could shift to the left or right, I am wondering whether it is necessary to transform the X and Z components into the foot’s local coordinate system? My concern is how to compare the results with the literature, as the graphs appear quite different. Should I use the results in the global coordinate system, or would transforming them to the foot's coordinate system provide a more accurate comparison?
Knee Joint Forces Analysis:
Regarding the knee joint forces, I have separated the components into medial and lateral forces. However, I noticed that the graphs show significant peaks in the data.
Could this be due to noise in the data, or is there something else I might be overlooking?
The foot's contact with the ground seemed correct, so I applied a filter and got the following:
Any insights or suggestions you could offer on these points would be incredibly helpful.
Best regards,
Catarina Rocha