Dorsal interossei (hand) The dorsal interossei of the hand are four muscles which are located between each of the metacarpals. The dorsal interossei abduct the index, middle, and ring fingers. The first dorsal interosseous is also able to rotate the index finger slightly at the metacarpophalangeal joint and assist adductor pollicis in thumb adduction. Although small, the dorsal interossei are strong muscles that in synergy with the plantar interossei flex the lateral three toes at the metatarsophalangeal joints. This action is important as it positions the toes in a way that flexor digitorum longus and brevis can perform their activity during jumping and running. The dorsal interossei muscles originate from the adjacent sides of the first to fifth metacarpal bones. The dorsal interossei (or dorsal interossei muscles, latin: musculi interossei dorsales) of the hand are four muscles that belong to the medial muscle group of the hand. For questions regarding business inquiries. The dorsal interossei lie deep between the metacarpal bones on the dorsal surface of the hand. The dorsal interossei lie deep between the metacarpal bones on the dorsal surface of the hand. The dorsal interossei muscles of the hand are innervated by the ulnar nerve. The dorsal interossei (or dorsal interossei muscles, latin: musculi interossei dorsales) of the hand are four muscles that belong to the medial muscle group of the hand. The main function of the dorsal interossei is to adduct the second and fourth finger in relation to the axis of the middle finger. The dorsal interossei muscles insert onto the proximal phalanges of the second, third and fourth fingers. Each muscle is … Please contact.

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