Solutions
extensor retinaculum holds tendons of extensor muscles in place
Muscles of posterior antebrachial compartment (lateral to medial) abductor pollicis longus
(APL)
extensor pollicis brevis (EPB)
extensor carpi radialis longus (ECRL)
extensor carpi radialis brevis (ECRB)
extensor pollicis longus (EPL)
extensor indicis (EI)
extensor digitorum (ED)
extensor digiti minimi (EDM)
extensor carpi ulnaris (ECU)
Outcropping extensors to thumb:
- abductor pollicis longus
- extensor pollicis brevis
- extensor pollicis longus
, OTD Anatomy Test 1 Questions With
Solutions
- extensor indicis
Posterior compartment function wrist/hand extensors, supination
Primary innervation of posterior compartment branches of radial N (deep & superficial)
Posterior compartment (superficial muscles) common site of attachment lateral epicondyle
of humerus
pathway of the radial N deep radial wraps posteriorly > posterior interosseous after
supinator
pathway of the ulnar nerve runs posterior to lateral epicondyle, runs anterior afterwards
Superficial posterior antebrachium muscles (superior to inferior) brachioradials
ECRL
ECRB