The Shoulder Joint Flashcards
What is the osteology of the clavicle, the scapula?
The clavicle contains an acromial and sternal end, with a trapezoid line, conoid tubercle and impression for the costoclavicular ligament. The scapula contains a lateral and medial border on its posterior aspect, with the infraspinous fossa inferior to the spine which lead to the acromion. The supraspinous fossa is beneath the suprascapular angle and notch and leads to the coracoid process. The glenoid cavity is the attachment site of the head of the humerus. On the anterior aspect of the scapula the subscapular fossa is visible as is the inferior angle.
What is the osteology of the humerus?
The humerus has a semi rounded proximal end which articulates with the scapula. The proximal end is composed of greater and lesser tubercles separated by an intertubercular sulcus. The anatomical neck forms the head which is involved in the joint whilst inferior to this is the surgical neck. The deltoid tuberosity is the attachment site of the deltoid. Anteriorly and distally, the medial epicondyle is medial to the trochlea, the coronoid fossa, the capitulum, the radial fossa and the lateral supracondylar ridge. The posterior aspect moving laterally from the medial epicondyle is beside the trochlea, the olecranon fossa, the medial supracondylar ridge then the lateral epicondyle.
What are the surgical and anatomical necks of the humerus?
The surgical neck of the humeral is where the head meets the body or shaft of the humerus, whereas the anatomical neck is where the head meets the tubercles (forms the joint)
What attaches to the greater tubercle of the humerus?
The greater tubercle is the attachment point for the supraspinatus, infraspinatus and teres minor muscles.
