Abductor digiti minimi muscle of foot

Abductor digiti minimi muscle of foot

The abductor digiti minimi muscle of foot is a muscle located in the foot that plays an important role in the movement and stability of the toes. It is one of the intrinsic muscles of the foot and is responsible for the abduction and flexion of the little toe.

Anatomy

The abductor digiti minimi muscle of foot originates from the lateral process of the calcaneal tuberosity, which is a bony prominence on the heel bone called the calcaneus. From there, it extends along the lateral side of the foot and inserts into the base of the proximal phalanx of the little toe.

The muscle is innervated by the lateral plantar nerve, which is a branch of the tibial nerve. This nerve supplies motor fibers to the abductor digiti minimi muscle, allowing it to contract and perform its functions.

Function

The main function of the abductor digiti minimi muscle of foot is to abduct the little toe away from the other toes. This movement is important for maintaining balance and stability while walking or standing. Additionally, the muscle also assists in flexing the little toe, contributing to the overall movement and dexterity of the foot.

Clinical Significance

Injuries or conditions affecting the abductor digiti minimi muscle of foot can lead to various symptoms and functional limitations. Some common issues include:

- Abductor digiti minimi strain: Overuse or excessive stress on the muscle can result in a strain, causing pain, swelling, and difficulty in moving the little toe.

- Abductor digiti minimi tendinitis: Inflammation of the tendon of the muscle can occur due to repetitive activities or trauma, leading to pain and discomfort along the lateral side of the foot.

- Abductor digiti minimi muscle weakness: Weakness in the muscle can result from nerve damage or disuse, causing difficulties in toe abduction and flexion.