Abductor digiti minimi (foot)
Lying along the lateral border of the foot, the abductor digiti minimi (foot) is a muscle that shares its medial margin with the lateral plantar nerves and vessels. The muscle begins at the tuberosity of the plantar aponeuroosis and the ecalcaneus. It is inserted on the fibular side at the base of the first phalanx of the little toe. The muscle is the first layer of the plantar muscles. This muscle controls the movement of the metatarsophalangeal joint located between the base of the little toe and the head of the fifth metatarsal bone. It is what allows the little toe to flex and move. In rare cases of polydactyly the muscle connects to the sixth toe instead when there is one. The abductor digiti minimi (foot) is often injured due to its location during physical activity when a person is upright. The most common injury is orteil de belette, also known as weasel toe, which occurs mainly in women. Another common injury is plantar facitis. Injuries are graded on a scale of one to three, with three being the most serious.