Topic 8 - Carpal extensors and supinators of the radioulnar joint Flashcards
M.supinator
O: Lat. epicondyle and lat. collateral lig.
I: Cran. surface of the prox. of the radius
A: Supinate forearm and forefoot - rotates lat.
M.brachioradialis
(Just 33% has it)
O: Crista epicondylus lat.
I: Dist. med. of radius
A: Supinates forearm and forefoot - rotates lat.
M.extensor carpi radialis
O: Lat. epicondylar crest
I: Dorsal surface of base of Mc.2+3
A: Strongest extensor of the carpus
M.extensor carpi ulnaris
O: Lat. epicondyle
I: Lat. aspect of the base of Mc.5 and accessory carpal bone.
A: Supports carpus when extended to bear weight. Also help in flexion, abduction and lat. rotation of the carpal joint - because of the tendon to acc.carpal bone.
The muscles
M.supinator
M.brachioradialis
M.ext. carpi radialis
M.ext. carpi ulnaris