Upper limb - Intervals, spaces, areas (MSK)

Question 1

Quadrangular space

Borders, contents

Answer 1

Boundaries - Inferior border of teres minor (superior), superior border of teres major (inferior), medial shaft of the humerus (lateral), lateral boundary of the long head of triceps brachii (medial)

Contents - Axillary nerve, posterior circumflex humeral artery and vein

Question 2

Triangular interval

Boundaries, contents

Answer 2

Boundaries - Medial shaft of the humerus (lateral), inferior border of teres major (superior), lateral border of the long head of triceps brachii (medial)

Contents - Profunda brachii artery and veins and radial nerve

Question 3

Triangular space

Borders, contents

Answer 3

Boundaries - Inferior border of teres minor (superior), superior border of teres major (inferior), medial border of the long head of triceps brachii (lateral)

Contents - circumflex scapular artery

Question 4

Cubital fossa

Boundaries, roof and floor, main contents, other

Answer 4

Boundaries - Horizontal line between medial and lateral epicondyle (superior), lateral border of pronator teres (medial), medial border of brachioradialis (lateral)

Roof and floor - Bicipital aponeurosis and brachialis

Contents - TAN - Radial nerve, biceps tendon, brachial artery, median nerve (really need beer to be at my nicest) - lateral to medial

Other - Radial and ulnar nerves and arteries + other superficial veins

Question 5

Anatomical snuff box

Boundaries, floor and roof, contents

Answer 5

Extensor pollicis longus (medial), extensor pollicis brevis and abductor pollicis longus (lateral), base - styloid process of radius

Floor and roof - scaphoid and trapezium

contents - radial artery and radial nerve

Question 6

Carpal tunnel

Borders, contents

Answer 6

Borders - Deep carpal arch and superficial flexor retinaculum

Contents - Flexor digitroum superficialis tendons (x4), flexor digitorum profundus tendons (x4), flexor pollicis longus tendons, median nerve