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Dorsal interossei of the foot
Muscle parts
None
Latin name
Musculi interossei dorsalis (pes)
Latin muscle parts
None
Group
Foot muscle – plantar group – fourth layer
Etymology
This muscle’s name in English is the muscle between the bones on the back of the foot. Interossei comes from the Latin terms inter meaning “between” and os meaning “bone.” The word dorsalis is from the Latin dorsum for “back.”
Origin
Two headed bipennate muscles that attach to the adjacent surfaces of all the metatarsal bones.
Insertion
Sides of the bases of the proximal phalanges and the extensor expansion of the toes 2, 3, and 4; they attach to both sides of the second toe and to the lateral side of toes three and four.
Action
Abduction of digits 2, 3, and 4; extension of the interphalangeal joints.
Nerve supply
Lateral plantar nerve (S2 and S3)
Blood supply
The muscle is supplied by the lateral tarsal arteries, the medial tarsal arteries, the first to fourth plantar and dorsal metacarpal arteries, and the dorsal digital arteries.
