The lateral intermuscular septum extends from the lower part of the crest of the greater tubercle

Greater tubercle

The greater tubercle of the humerus is situated lateral to the head of the humerus and posteriolateral to the lesser tubercle.Its upper surface is rounded and marked by three flat impressions....

 of the humerus, along the lateral supracondylar ridge

Lateral supracondylar ridge

The lower part of the lateral border of the body of the humerus forms a prominent, rough margin, a little curved from behind forward, the lateral supracondylar ridge , which presents an anterior lip for the origin of the Brachioradialis above, and Extensor carpi radialis longus below, a posterior...

, to the lateral epicondyle

Lateral epicondyle

Lateral epicondyle can refer to:* Lateral epicondyle of the humerus * Lateral epicondyle of the femur...

; it is blended with the tendon of the Deltoideus, gives attachment to the Triceps brachii behind, to the Brachialis, Brachioradialis

Brachioradialis

Brachioradialis is a muscle of the forearm that acts to flex the forearm at the elbow. It is also capable of both pronation and supination, depending on the position of the forearm...

, and Extensor carpi radialis longus in front, and is perforated by the radial nerve

Radial nerve

The radial nerve is a nerve in the human body that supplies the upper limb. It supplies the medial and lateral heads of the triceps brachii muscle of the arm, as well as all 12 muscles in the posterior osteofascial compartment of the forearm and the associated joints and overlying skin.It...

 and profunda branch of the brachial artery

Brachial artery

The brachial artery is the major blood vessel of the arm.It is the continuation of the axillary artery beyond the lower margin of teres major muscle. It continues down the ventral surface of the arm until it reaches the cubital fossa at the elbow. It then divides into the radial and ulnar arteries...

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External links

• Slide at curtin.edu.au