Orthopedic Mnemonics

Ref: BDC 4^th ed/ vol I p.113 Carpal tunnel syndrome is caused by the compression of Median nerve running deep to the flexor retinaculum in the wrist. Adductor pollicis is supplied by the ulnar nerve, which passes superficial to flexor retinaculum.   Structures passing superficial to flexor retinaculum 1)      Palmar cutaneous branch of median nerve 2)      Palmar cutaneous branch of ulnar nerve 3)      Ulnar nerve 4)      Ulnar artery 5)      Flexor carpi ulnaris 6)      Palmaris longus tendon 7)      Superficial branch of radial artery Structures passing deep to flexor retinaculum 1)      Median nerve 2)      Radial and ulnar bursa 3)      Flexor digitorum superficialis tendon 4)      Flexor digitorum profundus tendon 5)      Flexor pollicis longus 6)      Flexor carpi radialis   Nerve supply of muscles of hand 1)      Median nerve  1^st and 2^nd lumbricals Thenar muscles – Abductor pollicis brevis Flexor pollicis brevis Opponens pollicis Sensory- Palmar/ Anterior-Tip of index finger, Lateral 3 ½ digits, thenar area(lateral 2/3^rd  palm)                 Posterior- lateral ½ palm Proximal phalanx -lateral 2 ½ digits Middle and distal phalanx – lateral 3 ½ digits   2)      Ulnar nerve 3^rd and 4^th lumbricals Interossei (palmar and dorsal) Thenar muscles - Adductor pollicis, deep head of flexor pollicis brevis Hypothenar muscles – Palmaris brevis Flexor digiti minimi Abductor digiti minimi Opponens digiti minimi Sensory- Palmar/ Anterior -Tip of little finger Hypothenar area (medial 1/3^rd palm) Medial 1 ^½ digits Posterior- Medial ½ palm Proximal phalanx – medial 2 ½ digits Middle and distal phalanx- medial 1 ½ digits