Wrist Cross Section (Extensor)


Your consultant would like to test your anatomy of the wrist. He shows you a cross section of the extensor component of the wrist.

Please name the structures labelled in the cross section above.





Abductor pollicis longus

Abductor pollicis brevis

Radial artery

Superficial radial nerve

Cephalic vein

Extensor carpi radialis longus + brevis

Extensor pollicis longus

Extensor indicis

Extensor digitorum

Extensor digiti minimi

Basilic vein

superficial ulnar nerve

Extensor carpi ulnaris

Compartment 1

  • Extensor pollicis Brevis
  • Abductor pollicis longus

Compartment 2

  • Extensor carpi radialis brevis
  • Extensor carpi radialis longus

Compartment 3

  • Extensor pollicis longus

Compartment 4

  • Extensor digitorum
  • Extensor indicis

Compartment 5

  • Extensor digiti minimi

Compartment 6

  • Extensor carpi ulnaris