Finger extensors Flashcards
name the finger extensors
Extensor Digitorum, Extensor Digiti Minimi, Interossei, Lumbricals
Extensor Digitorum origin
lat. epicondyle of humerous via common extensor tendon
Extensor Digitorum insertion
via dorsal digital expansion to base of posterior surface distal & middle phalanges of fingers
Extensor Digitorum nerve supply
post. interosseous branch of radial nerve c7, 8
Extensor Digitorum action
extends distal & proximal interphalangeal, metacarpophalangeal & wrist joints
Extensor Digitorum function
blocking
Extensor Digiti Minimi origin
lat. epicondyle of humerous, via common extensor tendon
Extensor Digiti Minimi instertion
joins doral digital expansion of little finger
Extensor Digiti Minimi nerve supply
post. interosseous branch of radial nerve C7, C8
Extensor Digiti Minimi action
little finger extension
Extensor Digiti Minimi function
blocking
Palmar Interossei origin
shaft of a metacarpal
dorsal Interossei origin
sides of adjacent metacarpals
Palmar Interossei insertion
dorsal digit expansion & base of proximal phalanx
dorsal Interossei insertion
dorsal digital expansion & proximal pahalanx
