Extensor Pollicis Brevis

Description

Illustration of Extensor Pollicis Brevis

Clinical picture of abductor pollicis longus; extensor pollicis brevis; extensor pollicis longus

Origin

• Posterior surface of distal 1/3 of Radius
• Interosseous Membrane of the forearm

Insertion

• Posterior surface of base of proximal phalanx of digit 1 (thumb)

Actions

• Extension of digit 1 (thumb) at the carpometacarpal joint, metacarpophalangeal joints

Vascular Supply

• Posterior Interosseous Artery
• Anterior Interosseous Artery

Nerve

• Posterior Interosseous Nerve

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Clinical Significance

• De Quervains Tenosynovitis
• Anatomic Snuffbox

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See Also

• Physical Exam Hand
• Hand Pain (Main)
• Physical Exam Wrist
• Wrist Pain (Main)
• Physical Exam Forearm
• Forearm Pain (Main)
• Hand And Wrist Anatomy

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