Extensor Digitorum Brevis

Description

Extensor digitorum brevis and extensor hallucis brevis illustration

Names

• EDB Muscle
• Extensor Digitorum Brevis Muscle
• Short Extensor of the Toes
• Short Toe Extensor
• Dorsal Short Toe Extensor
• Musculus Extensor Digitorum Brevis

General

• Extends digits 1-4 of foot at the metatarsophalangeal joint
• Extends digits 2-4 at the interphalangeal joint
• Some anatomists think it is part of the Extensor Hallucis Brevis muscle

Origin

• Calcaneus (in front of the groove for the peroneus brevis tendon)
• Interosseous talocalcaneal ligament
• Stem of the inferior extensor retinaculum

Insertion

• Digit 1: Dorsal surface of the base of the proximal phalanx
• Digits 2-4: Lateral side of the tendon of the Extensor Digitorum Longus

Actions

• Extends digits 1-4 of foot at the metatarsophalangeal joint
• Extends digits 2-4 at the interphalangeal joint

Vascular Supply

• Branches of Dorsalis Pedis Artery

Innervation

• Lateral terminal branch of Deep Peroneal Nerve

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Clinical Significance

• Needs to be updated

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See Also

• Physical Exam Foot
• Foot Anatomy (Main)
• Foot Pain (Main)

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