Fig. 2From: Anteroinferior bundle of the acromioclavicular ligament plays a substantial role in the joint function during shoulder elevation and horizontal adduction: a finite element modelLocal coordinate system of clavicle (A–C) and scapula (E, F). Definition of sternoclavicular (A–C) and scapulothoracic (D–F) motion. Using a 3D coordinate system and Cardan or Euler angles, following International Society of Biomechanics recommendations [31]Back to article page