Upper Limb - Carpal tunnel

Question 1

Attachments of the flexor retinaculum?

Answer 1

Medially to pisiform + hook of hamate

Scaphoid tubercle + ridge of trapezium

Question 2

What structures pass through the carpal tunnel?

Answer 2

Flexor carpi radialis
Flexor pollicis longus
Four tendons of FDP + FDS
Median nerve

Question 3

What structures pass superficial to flexor retinaculum ?

Answer 3

tendon of palmaris longus
Ulnar nerve
Ulnar artery palmar cutaneous branch of median and ulnar nerves
Superficial palmar branch of the radial artery

Question 4

What structures pass through extensor retinaculum ?

Answer 4

• adbuctor pollicis longus/brevis tendon
  
  • tendons of extensor carpi radialis longus and brevis
  • extensor pollicis brevis
  • extensor digitorum and extensor indicis tendon
  • tendon of extensor digiti minimi
  • extensor carpi ulnaris

Question 5

What structures pass over the extensor retinaculum ?

Answer 5

• dorsal branch of ulnar nerve
• superficial branch of radial nerve
• radial artery

Question 6

What ligaments form the Extensor retinaculum ?

Answer 6

Annular ligament + dorsal carpal ligament