Abductor Pollicis Longus

Description

Illustration of Abductor Pollicis Longus muscle

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

General

• Abductor Pollicis Longus or APL

Origin

• Posterior surface of proximal half of Radius and Ulna
• Interosseous Membrane

Insertion

• Base of Trapezium

Actions

• Extension and abduction of digit 1 (thumb) at the carpometacarpal joint
• Extension of wrist at radiocarpal joint

Vascular Supply

• Anterior Interosseous Artery
• Posterior 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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