Pronasyon / süpinasyon hareketi için sabit olmayan bir dönme ekseni içeren kinematik ön kol modelinin geliştirilmesi

Understanding the biomechanics of the forearm motion is essential for many research areas to improve the quality of human life. İn this study, a new kinematic forearm model is proposed for estimating the rotation axis and obtaining proper forearm orientation during the pro/supination motion. As an improvement, a moving rotation axis is included as a link inside the model, and the rotation of the radius segment around the moving rotation axis is investigated. The model is tested in different motion patterns and compared with the rotation around tilted fixed axis as well as the experimental motion data. The outcome of the model shows that with defining the pro/supination motion as a rotation around the moving rotation axis (MRA), the trajectories and the range of motions of the radius are obtained within the expected ranges according to the literatüre. Besides, the MRA model provides more reliable results compared with the fixed axis. The comparison with the experimental analysis shows that the radius trajectory of the model is compatible with the motion data. For further investigations, with the subject specific adjustment, the proposed model can provide better understanding on the forearm kinematics.