Extensor hallucis brevis

  • The extensor hallucis brevis (also extensor hallucis brevis muscle, latin: musculus extensor hallucis brevis) is a muscle of the dorsum or upper surface of the foot that aids in extension of the big toe.

    Origin

    The extensor hallucis brevis originates from the superior or dorsal surface of the calcaneus.

    Insertion

    The muscle fibers of the extensor hallucis brevis insert into the tendon of the extensor hallucis longus.

    Action

    The main function of the extensor hallucis brevis is to extend the big toe.

    Innervation

    The extensor hallucis brevis is innervated by the deep peroneal nerve (also known as deep fibular nerve), a branch of the common peroneal (fibular) nerve.