Flexor digitorum brevis

Flexor Digitorum Brevis is a muscle located in the foot, specifically in the central part of the sole. It is one of the muscles that enable the movement of the toes. The muscle originates from the medial process of the calcaneal tuberosity, a roughened area at the back of the heel bone. It inserts into the middle phalanges of the four lesser toes.

Anatomy

The Flexor Digitorum Brevis is the largest muscle in the central compartment of the foot. It is located immediately above the plantar aponeurosis and is separated from it by a thin layer of fascia. The muscle is somewhat quadrilateral in shape, and is broader in the middle than at either end. It originates from the medial process of the calcaneal tuberosity, the plantar aponeurosis, and the intermuscular septa. It divides into four tendons, one for each of the lesser toes. These tendons, after a short course, split into two parts to allow the tendons of the Flexor Digitorum Longus to pass to their insertions.

Function

The primary function of the Flexor Digitorum Brevis is to flex the second, third, fourth, and fifth toes at the middle phalanges. This action is important for maintaining balance while standing and walking, especially on uneven surfaces. The muscle also helps in the propulsion phase of gait, when the body is pushed forward.

Clinical Significance

Damage or injury to the Flexor Digitorum Brevis can result in foot pain and difficulty in walking. Conditions such as Plantar Fasciitis and Flat Foot can also affect the function of this muscle. Treatment usually involves physical therapy, pain management, and in severe cases, surgery.

See Also

• Foot Muscles
• Flexor Digitorum Longus
• Plantar Fasciitis
• Flat Foot

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