What are the boundaries of the cubital fossa?

The cubital fossa is a triangular depression with boundaries defined by: lateral (medial border of brachioradialis), medial (lateral border of pronator teres), base (imaginary line between humeral epicondyles), and apex (intersection of lateral and medial boundaries).

What structures are found in the cubital fossa?

The contents of the cubital fossa, arranged medial to lateral, are the median nerve, brachial artery, biceps tendon, and superficial radial nerve, often remembered with the mnemonic MBBS.

Why is the cubital fossa clinically important for venipuncture?

The cubital fossa is clinically important for venipuncture because the median cubital vein in its roof is the preferred site for blood collection and IV access.

How is the brachial artery related to the cubital fossa?

The brachial artery is a key content of the cubital fossa, terminating into radial and ulnar arteries, and its pulse is palpated medial to the biceps tendon for blood pressure measurement.

What forms the floor of the cubital fossa?

The floor of the cubital fossa is formed by the brachialis muscle in the upper part and the supinator muscle in the lower part.

What are the layers of the roof of the cubital fossa?

The roof of the cubital fossa consists of skin, superficial fascia (containing the median cubital vein and cutaneous nerves), and deep fascia reinforced by the bicipital aponeurosis.

How can a supracondylar humerus fracture affect the cubital fossa?

A supracondylar humerus fracture can endanger the brachial artery and median nerve in the cubital fossa, risking vascular or nerve damage.

Cubital Fossa Anatomy – Boundaries, Contents & Mnemonics

❓ Frequently Asked Questions