One of most common ways to examine the quality of the patient’s upper extremity (UE) function is measuring the movement’s kinematic parameters during the motion. However, is it reliable to compare a patient’s UE motions data with healthy people’s characteristic parameters? In this paper is shown that intrapersonal coefficient of variability (CV) in angles amplitudes differs from 3.2% during elbow flexion to 52.9% during wrist abduction and CV in angular velocity differs from 22.1% during shoulder abduction to 66.3% during wrist abduction.

Keywords: upper extremity, objective parameters, motion capturing system, biomechanics