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Extensor hallucis brevis muscle

from Latin: hallux - toe; extendere - to expand, to extend; brevis - short
Synonym: short big toe extensor
German: Musculus extensor hallucis brevis

1 Definition

The extensor hallucis brevis muscle is a broad, thin muscle that counts among the extensor muscles of the back of the foot.

Note: Some authors regard the extensor hallucis brevis muscle as a part of the extensor digitorum brevis muscle.

2 Devolution

2.1 Origin

The muscle has its origin at the cranial surface dorsal surface of the calcaneus.

2.2 Insertion

The muscle passes diagonally across the back of the foot and ends in a tendon that inserts into the phalanx of the big toe and into its dorsal aponeurosis.

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3 Innervation

The innervation of the extensor hallucis brevis muscle is provided by the deep peroneal nerve (segments: L5 and S1).

4 Function

The extensor hallucis brevis muscle is responsible for the dorsal flexion of the big toe.

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Specialties: Anatomy

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