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Hand Anatomy

Lumbrical Muscles of Hand Anatomy: Origin, Insertion, Action

Origin: Radial Side: From the tendons of the flexor digitorum profundus going to the 2nd and 3rd digits
Ulnar Side: From the adjacent sides of the second and third, and third and fourth tendons
Insertions: The radial side of extensor tendon on dorsum of each of the four digits at the proximal phalanges
Actions: Flex metacarpophalangeal joint; extends the proximal and distal interphalangeal joint

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