Regions

Question 1

Cubital fossa - borders?

Answer 1

• Lateral border–medial border of the brachioradialis muscle.
• Medial border–lateral border of the pronator teres muscle.
• Superior border– horizontal line drawn between the epicondyles of the humerus.
• Roof– bicipital aponeurosis, fascia, subcutaneous fat and skin.
• Floor– brachialis (proximally) and supinator (distally).

Question 2

Cubital fossa - contents?

Answer 2

1. Biceps brachii tendon
2. Brachial artery
3. Median nerve
4. Radial nerve
5. Median cubital vein

Question 3

What are the borders of the anatomical snuffbox?

Answer 3

• Ulnar (medial) border: Tendon of the extensor pollicis longus.
• Radial (lateral) border: Tendons of the extensor pollicis brevis and abductor pollicis longus.
• Proximal border: Styloid process of theradius
• Floor: Carpal bones; scaphoid and trapezium.
• Roof: Skin.

Question 4

What are the contents of the anatomical snuffbox?

Answer 4

1. Radial artery
2. Superficial branch of the radial nerve
3. Cephalic vein

Question 5

What is the insertion of Extensor Pollicus Longus?

Answer 5

Dorsum of the base of the terminal phalanx of the thumb

Question 6

What is the insertion of Extensor Pollicus Brevis?

Answer 6

Dorsum of the base of the proximal phalanx of the thumb