HUMERUS

It is the largest and longest bone of the upper limb. It articulates with the shoulder blade at the shoulder joint and with the radius and ulna at the elbow joint. It has two epiphyses and one diaphysis.

Proximal Epiphysis

 Humerus Head & #8211; Articulates with the glenoid cavity of the scapula

 Greater Tuber & #8211; It is located laterally to the head and the smaller tuber

 Smaller Tuber & #8211; It projects medially just below the lap

 Anatomical neck & #8211; Form an obtuse angle with the body

 Surgical neck

 Intertubercular Groove & #8211; Deep groove separating the two tubers

Distal Epiphysis

 Trochlea & #8211; Similar to a spool. Articulates with the ulna.

 Chapter & #8211; Smooth and rounded eminence. Articulates with the radio.

 Medial Epicondyle & #8211; It is located medially to the trochlea.

 Lateral Epicondyle & #8211; Small tuberculate eminence. Located laterally to the chapter.

 Coronoid Fossa & #8211; Small depression that receives the coronoid process of the ulna in the flexion of the forearm

 Radial Fossa & #8211; Little depression

 Olecranon Fossa & #8211; Deep triangular depression that receives the olecranon in the extension of the forearm.

 Ulnar Nerve Groove & #8211; Depression located inferiorly to the medial epicondyle.

Diaphysis

 Deltoidea tuberosity & #8211; Rough triangular elevation for deltoid muscle insertion

 Radial Nerve Groove & #8211; Wide and shallow oblique depression

THE Humerus articulates with three bones: the Scapula, the Radio and the Ulna.

Proximal Joint of the HumerusDistal humeral joint

UMBER & #8211; PREVIOUS AND REAR VIEW
 Humerus - Anterior and Posterior View
Source: SOBOTTA, Johannes. Atlas of Human Anatomy. 21st. Rio de Janeiro: Guanabara Koogan, 2000.

 

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