A novel method for determination and representation the range of motion for the shoulder joint through its coordinate axis

This work presents an algorithm for a shoulder model as a dynamic system to reproduce its movements. This proposal describes the range of motion of the shoulder through a coordinate system by using matrix rotation. Thus the shoulder motion is represented in a new coordinate system by a vector position. The reliability of the proposal algorithm was performed by making several tests on a healthy volunteer with a commercial optoelectronic motion analysis system. The results obtained with the commercial system were compared with those obtained with the proposed algorithm. The aim of this work is to create a unique and simplified equation to reproduce the evaluated movements open opportunities to be implemented on embedded devices.