O&I sheet 4- Extensor pollicis longus- abductor pollicis longus
abductor pollicis longus action
1. abducts the first metacarpal 2. radially deviates the wrist 3. assists to extend & rotate the thumb 4. flexes the wrist
extensor pollicis brevis action
1. extends the proximal phalanx and 1st metacarpal of the thumb 2. radially deviates the wrist
extensor pollicis longus action
1. extends the proximal phalanx and 1st metacarpal of the thumb 2. radially deviates the wrist
extensor pollicis brevis origin
1. posterior surface of radius (below abd poll longus) 2. interosseous membrane
extensor pollicis longus origin
1. posterior surface of ulna 2. interosseous membrane
abductor pollicis longus origin
1. posterior surface of ulna and radius 2. interosseous membrane
abductor pollicis longus insertion
Lateral aspect of base of 1st metacarpal
extensor pollicis brevis insertion
base of proximal phalanx of thumb
extensor pollicis longus insertion
distal phalanx of thumb
abductor pollicis longus innervation
radial nerve
extensor pollicis brevis innervation
radial nerve
extensor pollicis longus innervation
radial nerve