by Yapa Wijeratne
Faculty of Medicine
University of Peradeniya
• Lateral: brachioradialis
• Medial: pronator teres
• Base: an imaginary horizontal line between the medial
and lateral epicondyles.
• Bed/ floor: (mainly) by the brachialis muscle.
• & below by the supinator.
• Roof: deep fascia of the forearm,
• reinforced on the medial side by the bicipital aponeurosis.
from lateral to medial, are:
• Tendon of the biceps brachii muscle;
• Brachial artery;
• Median nerve
TAN-tendon artery nerve
• Lies just under the lip of the brachioradialis muscle.
• In this position, the radial nerve divides into superficial
and deep branches:
1. The superficial branch continues into the forearm
just deep to the brachioradialis muscle;
2. The deep branch passes between the two heads
of the supinator muscle to access the posterior
compartment of the forearm.
• The ulnar nerve DOES NOT PASS THROUGH the
cubital fossa. Instead, it passes posterior to the
1.Median cubital vein,
which passes diagonally across the roof and
connects the cephalic vein on the lateral side of
the upper limb with the basilic vein on the medial
The bicipital aponeurosis separates the median
cubital vein from the brachial artery and median
• Medial cutaneous nerve of the forearm
• Lateral cutaneous nerve of the forearm