The importance of the clavicle biomechanics in the shoulder movement

Authors: László Irsay1,2, Adela Raluca Nistor2, Alina Ciubean1, Ileana Monica Borda1,2, Rodica Ungur1,2, Ioan Onac1,2,Viorela Ciortea1,2



1 “Iuliu Hatieganu” University of Medicine and Pharmacy Cluj-Napoca, Romania

2 Clinical Rehabilitation Hospital Cluj-Napoca, Romania



The sternoclavicular joint (SC) provides the attachment belt for the upper limb. It is the only direct joint that attaches the upper limb to the trunk. Practically, the clavicle moves while the sternum remains fixed. The SC joint is an important fulcrum for the movement of the shoulder girdle. The disc and ligaments of the SC joint offer such an effective support that the dislo­cation of the sternoclavicular joint is rare. The acromioclavicular joint (AC) connects the acromial process of the scapula and the clavicle. The movements of the AC joint are minimal, but crucial for the normal shoulder motion.

In clinical practice, the movement of the clavicle is often neglected. This movement occurs in 3 planes; the integrity of these movement planes is essential in the complex motion of the arm. Any disturbance in the normal movement of the clavicle will automatically limit the range of motion of the arm, especially the abduction.

The researchers consider that, from the practical point of view, the knowledge regarding the biomechanics of the clavi­cle is critical, since any limitation of the mobility of the shoulder can shroud a pathology that can block the mobility of the clavicle.


Key words: sternoclavicular joint, acromioclavicular joint, shoulder.

The importance of the clavicle biomechanics in the shoulder movement