Extensor digitorum brevis muscle

The muscle originates from the forepart of the upper and lateral surface of the calcaneus (in front of the groove for the peroneus brevis tendon), from the interosseous talocalcaneal ligament and the stem of the inferior extensor retinaculum. The fibres pass obliquely forwards and medially across the dorsum of the foot and end in four tendons. The medial part of the muscle, also known as extensor hallucis brevis, ends in a tendon which crosses the dorsalis pedis artery and inserts into the dorsal surface of the base of the proximal phalanx of the great toe. The other three tendons insert into the lateral sides of the tendons of extensor digitorum longus for the second, third and fourth toes.

Extensor digitorum brevis extends the first four digits at the metatarsophalangeal joint and assists in extending the second, third and fourth digits at the interphalangeal joint. The fifth digit, lacking any insertion from extensor digitorum brevis, can only be raised by the long extensor.

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  Bones of the right foot. Dorsal surface.
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  Muscles of the front of the leg.
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  Cross-section through middle of leg.
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  Dorsum of Foot. Deep dissection.
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  Dorsum of Foot. Deep dissection.

• Extensor digitorum longus muscle
• Extensor hallucis brevis
• Extensor digitorum muscle

Wikimedia Commons has media related to Extensor digitorum brevis muscles.

• Anatomy photo:16:st-0405 at the SUNY Downstate Medical Center - "The Foot: Muscles"
• "Anatomy diagram: 39960.000-1". Roche Lexicon - illustrated navigator. Elsevier. Archived from the original on 2012-07-22.
• PTCentral