Human Anatomy Vol 1

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UPPER LIMB

The ulnar nerve (which was seen in the anterior

compartment of arm till its middle) pierces the medial

intermuscular septum with its accompanying vessels,

reaches the back of elbow and may easily be palpated

on the back of medial epicondyle of humerus.

Feolules

The region contains the triceps muscle, the radial nerve

and the profunda brachii artery. The nerve and artery

Roof

Cephalic vein

Lateral cutaneous nerve of forearm

Extensor carpi radlalis longus

Brachioradialis (lateral boundary)

Fig.8.18: Contents of the right cubital fossa

run through the muscle. The ulnar nerve runs through

the lower part of this compartment.

TRICEPS BR HII MUSCLE

Origin

Triceps brachii muscle arises by the following three

heads (Fig.8.20).

1 The long head arises from the infraglenoid tubercle

of the scapula; it is the longest of the three heads.

Basilic vein

Medial cutaneous nerve of forearm

Median nerve (M)

Brachial artery (B)

Biceps brachii (B)

Radial nerve (R)

Branch to flexor muscles

Deep branch of radial nerve

Ulnar artery

Radial artery

Superficial branch of radial nerve

Pronator teres (medial boundary)

Pronator teres

Median nerve

Ulnar artery

Brachialis

Apex

Fig.8.17: Muscles forming floor of right cubital fossa with its contents

Radial artery

Brachioradialis

Radial

nerye

Median nerve (Ml)

Brachial artery (B)

Biceps brachii (B)

Radial nerve (R)

Pronator teres

Bicipital aponeurosis

Brachioradialis

interosseous nerve Supinator

Fig" 8.19: Contents of the cubital fossa as seen a cross-section