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DORSAL INTEROSSEI

Origin of Dorsal Interossei

Dorsal 1 - 4: Adjacent sides of two metacarpals (bipennate muscles)

Insertion of Dorsal Interossei

Dorsal 1 - 4: Extensor expansions and bases of proximal phalanges of digits 2 - 4

Muscle Function of Dorsal Interossei

Dorsal 1 - 4: Abduct digits from axial line and act with lumbricals to flex metacarpophalangeal joints and extend interphalangeal joints

Artery Supply of Dorsal Interossei

Dorsal 1 - 4: Dorsal and palmar metacarpal arteries
dorsal interossei muscle

Dorsal Interossei Muscles Video

Forearm & Hand 7981918900036834433

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