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without adjusting its joint parameters may not properly correspond to a certain patient.

Earlier studies described optimization methods to determine a set of model parameters for

a 3D, 2 DOF model by decreasing the error between the motion of the model and

experimental data (Sommer and Miller, 1980; Bogert et al., 1994). A model defined by

optimal joint parameters without optimizing its segment positions may not accurately

describe the motion of a patient within the bounds of the chosen joint approximations.