Flexor and extensor retinaculum

Structures passing beneath the flexor retinaculum

From medial to lateral:

  1. Flexor digitorum superficialis
  2. Flexor digitorum profundus
  3. Medial N
  4. Flexor pollicis longus
  5. Flexor carpi radialis

4 muscles and 1 nerve,ulnar bursa and radila bursa also lie deep to Flexor retinaculum

Structures passing above flexor retinaculum

From medial to lateral:

  1. Flexor carpi ulnaris tendon
  2. Ulnar N
  3. Ulnar artery
  4. Palmar cutaneous br of Ulnar N
  5. Palmaris Longus tendon
  6. Palmar cutaneous br of Median N

2 tendons and 3 nerves and an artery.

Extensor retinaculum

Structures passing through

from Medial to lateral:

  1. Extensor carpi ulnaris
  2. Extensor digiti minimi
  3. Extensor digitorum and extensor indicis
  4. Extensor pollicis longus
  5. Extensor carpi radialis longus and ext carpi radialis brevis
  6. Abductor pollicis longus,ext pollicis brevis,radial artery(Anatomical snuff box)

Structures passing superficial

  1. Dorsal/post cutaneous br of Ulnar N
  2. Basilic vein
  3. Cephalic vein
  4. Superficial br of radial N
  1. What is br ?

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