10 Questions
What is the relationship between the radial and ulnar arteries in the cubital fossa?
The radial artery is smaller and more superficial than the ulnar artery
Which muscle does the median nerve pass between to leave the cubital fossa?
Pronator teres
What is the boundary of the cubital fossa formed by?
Brachialis and supinator
Which nerve descends medial to lateral epicondyle to enter the cubital fossa?
Radial nerve
What is the branch of the radial artery that is given off in the cubital fossa?
Radial recurrent branch
What is the order of contents in the cubital fossa from medial to lateral?
Median nerve, brachial artery, radial nerve
Which muscle surrounds the upper part of the radius?
Supinator
What is the relationship between the brachial artery and the radial and ulnar arteries in the cubital fossa?
The brachial artery terminates and divides into the radial and ulnar arteries
What is the direction of the median nerve in the cubital fossa?
Medial to lateral
What is the shape of the cubital fossa?
Narrow and triangular
Study Notes
Cubital Fossa
- Cubital fossa is a triangular hollow situated on the front of the elbow, homologous to the popliteal fossa of the lower limb.
- Boundaries:
- Medially: Lateral border of the pronator teres
- Laterally: Medial border of the brachioradialis
- Base: Imaginary line joining the front of the two epicondyles of the humerus, directed upwards
- Apex: Area where brachioradialis crosses the pronator teres muscle, directed downwards
Roof of the Cubital Fossa
- Formed by:
- Skin
- Superficial fascia containing the median cubital vein
- Deep fascia
- Bicipital aponeurosis
- Contains:
- Median cubital vein joining cephalic and basilic veins
- Lateral cutaneous nerve of the forearm along with cephalic vein
- Medial cutaneous nerve of the forearm along with basilic vein
Floor of the Cubital Fossa
- Formed by:
- Brachialis muscle
- Supinator muscle
- Contains:
- Posterior interosseous nerve or deep branch of the radial nerve
- Branches to extensor carpi radialis brevis and supinator
Contents of the Cubital Fossa
- In order from medial to lateral side:
- Median nerve
- Terminal part of brachial artery bifurcating into radial and ulnar arteries
- Tendon of biceps brachii muscle
- Radial nerve on a deeper plane on the lateral side of biceps tendon
- Ulnar artery goes deep to both heads of pronator teres and runs downwards and medially
This quiz covers the identification and description of the boundaries and contents of the cubital fossa, a triangular hollow on the front of the elbow.
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