Humerus is a long bone which consists of a shaft (diaphysis) and two extremities (epiphysis). It is the longest bone of the upper extremity. It's name comes from the word "humorous" because when hitting it at the ulnar nerve it gives a strange "kind of funny" feeling.


Upper Extremity Features

The head (caput humeri) is the articular surface of the upper extremity, which is an irregular hemisphere.

The anatomical neck is the part between the head and the tuberosities.

The surgical neck is the part between the tuberosities and the shaft.

The greater tuberosity it is located lateral to the head.

The lesser tuberosity is located inferior to the head, on the anterior part of the humerus, Its very prominent and palpable.

Bicipital (intertubercular) groove is located between the two tuberosities. The Biceps tendon is placed here.

Body Features

The body of the humerus has three borders and three surfaces.


  1. Anterior
  2. Lateral
  3. Medial


  1. Antero-lateral
  2. Antero-medial
  3. Posterior


The Humerus serves as an attachment to 13 Muscles and 3 very important Nerves, which control the functions of hand and elbow, pass through the humerus.[2]


Articulatio Humeri

Articulatio Cubiti

Muscle Attachments

Muscle Attachment
Supraspinatus Greater Tubercle
Infraspinatus Greater Tubercle
Teres Minor Greater Tubercle

Upper Part of the Lateral Border

Subscapularis Lesser Tubercle
Pectoralis Major Upper Part of the Anterior Border
Triceps Brachii Lower Part of the Lateral Border

Lateral Supracondylar Ridge

Brachioradialis Lateral Supracondylar Ridge
Extensor Carpi Radialis Longus Lateral Supracondylar Ridge
Teres Major Crest of the Lesser Tubercle
Coracobrachialis Crest of the Lesser Tubercle
Brachialis Medial Supracondylar Ridge
Pronator Teres Medial Supracondylar Ridge
Latissimus Dorsi Bicipital Groove



Gray H., 2000, Anatomy of Human Body, Twentieth Edition, New York,

Liridona Dervishi