The shoulder-joint results from the union of the glenoid or shallow cavity on the inferior extremity of the scapula or blade-bone, with the much larger articular surface provided by the head of the humerus or upper arm.
The shoulder-joint is capable of describing a great variety and considerable range of movement. It allows of flexion, extension, abduction, adduction, rotation, and circumduction.
Fig. 352. - Capsular Ligament of Shoulder-Joint 1, Scapula. 2, Humerus. 3, Capsular Ligament.
Fig. 353. - Humero-radial or Elbow-Joint.
1, Humerus. 2, Radius. 3, Olecranon process of ulna. 4, Arciform ligament. 5, External lateral ligament. 6, Anterior ligament.