Hello all,

My colleagues and I have recently started to calculate the moment arm of
the tibialis anterior and Achilles tendon. The method we are using is
the Reuleaux graphical analysis. The images of the ankle are collected
using MRI techniques. The images are collected in the sagittal plane.
This technique has been described in Maganaris et al. (1999); Clinical
Biomechanics 14 pp661-666.

The problem we are experiencing is of locating the action line of the
tibialis anterior. The tibialis anterior tendon crosses the sagittal
plane, so only an oval cross-section can be seen. This does not appear
enough to accurately locate the action line of the tendon.

I am wondering if anyone has experienced this problem whilst using this
technique, and if so, can suggest any solutions.

The action line of the Achilles tendon is easy to see as it acts along
the sagittal plane.

I will forward a summary of the responses in a few weeks.

Thank you in advance.

Stuart C. Miller BSc. (Hons)

Centre for Sports Medicine and Human Performance

Brunel University