Abductor digiti minimi
Abductor Digiti Minimi
Abductor digiti minimi (/æbˈdʌktər ˈdɪdʒɪtaɪ ˈmɪnɪmaɪ/; from Latin abductor "leading away", digiti "of the finger", and minimi "smallest") is a muscle in the hand or foot that abducts the little finger or the little toe.
Anatomy
The abductor digiti minimi of the hand originates from the pisiform bone and the tendon of the flexor carpi ulnaris, and it inserts into the medial side of the base of the proximal phalanx of the little finger. It is innervated by the ulnar nerve.
The abductor digiti minimi of the foot originates from the lateral and medial process of the calcaneal tuberosity, the plantar aponeurosis, and the intermuscular septum between it and the flexor digitorum brevis. It inserts into the lateral side of the base of the proximal phalanx of the little toe. It is innervated by the lateral plantar nerve.
Function
The abductor digiti minimi in both the hand and foot serves to abduct the little finger or the little toe away from the midline of the hand or foot. This action is used in spreading the fingers or toes.
Related Terms
- Abduction: The movement of a body part away from the midline of the body.
- Adductor muscles: Muscles that bring a body part closer to the midline of the body.
- Flexor muscles: Muscles that decrease the angle between two bones at a joint.
- Extensor muscles: Muscles that increase the angle between two bones at a joint.
External links
- Medical encyclopedia article on Abductor digiti minimi
- Wikipedia's article - Abductor digiti minimi
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