Extension of the shoulder occurs when the humerus moves backwards from the ... Ball and socket joints also allow types of movement called abduction, adduction, rotation and circumduction.

Outward arm action in a jumping jack Rotator cuffs A group of stabilising muscles of the shoulder which helps to prevent dislocation and allows the shoulder to rotate the humerus around its own ...

Glenohumeral joint was set as the centre of an imaginary sphere intersected by the distal end of the humerus. In order to obtain intersection angles (azimuth: longitude and elevation: latitude) ...