Extensor Pollicis Brevis
Extends thumb at metacarpophalangeal joint. Located in the upper limb.
- Actions
- extends thumb at metacarpophalangeal joint
- Origin
- radius, interosseous membrane of forearm
- Insertion
- proximal phalanx of thumb
- Innervation
- posterior interosseous nerve (C7, C8)
- Blood supply
- posterior interosseous artery
Antagonists Flexor Pollicis LongusFlexor Pollicis Brevis