Hand Flashcards
Lumbricals
O: Tendons of flexor digitorum profundus
I: lateral aspect of extensor expansion 4 fingers
A: simoltaneous flexion MCP, PIP extension, DIP flexion
Palmar Interossei
O: 2nd, 4th, 5th, metacarpals
I: base of proximal phalanx of 2nd, 4th, and 5th fingers
A: adduct 1st, 4th, 5th fingers at MCP joint
Dorsal Interossei
O: adjacent metacarpals
I: base proximal phalanges of index, middle, and ring fingers
A: abduct fingers at MCP joint
Adductor Pollicis
O: oblique head- capitate, 2nd & 3rd base metacarpals
transverse head- distal 2/3 of palmar surface 3rd metacarpal
Opponens digiti minimi
O: hook of hamate & flexor retinaculum
I: ulnar border of 5th metacarpal
A: lil finger opposition
Abductor digiti minimi
O: pisiform & tendon of flexor carpi ulnas
I: proximal phalanx little finger
A: abducts MCP joint of little finger
Flexor digiti minimi
O: hamate & flexor retinaculum
I: base of proximal phalanx of little finger
A: flexes MCP joint of little finger
Opponens Pollicis
O: trapezium & flexor retinaculum
I: 1st metacarpal
A: thumb opposition
Abductor pollicis brevis
O: scaphoid, trapezium, flexor retinaculum
I: proximal phalanx of thumb
A: abducts CMC thumb joint, flexes CMC & MCP
Flexor pollicis brevis
O: trapezium & flexor retinaculum
I: proximal phalanx of thumb
A: flexes CMC, MCP of thumb
Extensor digiti minimi
O: lateral epicondyle humerus common extensor tendon
I: base distal phalanx little finger
A: extension MCP, PIP, DIP
Extensor Indicis
O: distal ulna & interosseous membrane
I: base distal phalanx
A: extend MCP,PIP, DIP index finger
Extensor Digitorum
O: lateral epicondyle humerus via common extensor tendon
I: base 2-5 distal phalanx
A: extends wrist, MCP, PIP, DIP
Extensor Pollicis longus
O: posterior middle portion ulna
I: base distal phalanx thumb
A: extends CMC, MCP, IP of thumb
Extensor Pollicis Brevis
O: posterior distal radius & extensor retinaculum
I: base proximal thumb phalanx
A: extends MCP & CMC joints
