of patients with flexion contractures (e.g., cerebral
palsy patients) may be susceptible to errors
throughout the gait cycle. Therefore, in such cases,
the ab/adduction and rotation angles must be interpreted
with caution.
Another source of error is due to uncertainty in
defining the neutral axis or plane for the transverse
plane rotations. Previously, it was suggested that a
reference data set with the subject standing still
(static) be used to obtain the position of the neutral