What is extensor digitorum brevis?

The extensor digitorum brevis is a small muscle located on the top of the foot. It originates from the calcaneus bone and extends into four tendons that insert into the middle phalanges of the second through fifth toes.

The main function of the extensor digitorum brevis is to extend (straighten) the toes at the metatarsophalangeal joints. It also assists in dorsiflexing (lifting) the foot at the ankle joint.

This muscle is innervated by the deep peroneal nerve (a branch of the common peroneal nerve) and receives blood supply from the dorsal metatarsal arteries.

The extensor digitorum brevis is important for maintaining proper foot function and mobility. It can be strengthened through exercises such as toe raises and toe curls to improve stability and flexibility in the foot.