Extensor brevis muscle

Extensor brevis muscle is a muscle located in the human body. It is part of the muscular system, which is responsible for movement and support. The extensor brevis muscle is specifically involved in the extension of the digits.

The extensor brevis muscle, as illustrated in Gray's Anatomy.

Structure

The extensor brevis muscle originates from the dorsal surface of the fibula and the interosseous membrane. It inserts into the dorsal surface of the base of the proximal phalanx of the digits. The muscle is innervated by the deep peroneal nerve.

Function

The primary function of the extensor brevis muscle is to extend the digits. This is particularly important for activities such as walking and running, where the extension of the digits is necessary for balance and propulsion.

Clinical significance

Damage to the extensor brevis muscle can result in a loss of digit extension. This can significantly impact a person's ability to walk or run. Treatment typically involves physical therapy to strengthen the muscle and restore function.

See also

• Muscular system
• Fibula
• Deep peroneal nerve