Extensor hallucis brevis muscle

Template:Short description Template:Template otherTemplate:Main other The extensor hallucis brevis is a muscle on the top of the foot that helps to extend the big toe.

Structure

The extensor hallucis brevis is essentially the medial part of the extensor digitorum brevis muscle. Some anatomists have debated whether these two muscles are distinct entities.

The extensor hallucis brevis arises from the calcaneus and inserts on the proximal phalanx of the digit 1 (the big toe).

Nerve supply

Nerve supplied by lateral terminal branch of Deep Peroneal Nerve (deep fibular nerve) (proximal sciatic branches S1, S2). Same innervation of Extensor Digitorum Brevis

Function

The extensor hallucis brevis helps to extend the big toe.

See also

• Extensor digitorum brevis
• Extensor hallucis longus

Additional images

• Ext. hallucis brevis labeled at center.
  Ext. hallucis brevis labeled at center.
• Dorsum of foot. Deep dissection.
  Dorsum of foot. Deep dissection.
• Dorsum of foot. Deep dissection.
  Dorsum of foot. Deep dissection.

External links

• Anatomy figure: 16:03-05 at Human Anatomy Online, SUNY Downstate Medical Center - "Dorsum of the foot showing the tendons that cross the ankle joint."