lumbrical muscles of hand


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lum·bri·cal mus·cles of hand

(lŭm'bri-kăl mŭs'ĕlz hand)
Four intrinsic muscles of the hand; origin, the two lateral: from the radial side of the tendons of the flexor digitorum profundus going to the index and middle fingers; the two medial: from the adjacent sides of the second and third, and third and fourth tendons; insertion, radial side of extensor tendon on dorsum of each of the four fingers; action, flexes metacarpophalangeal joint and extends the proximal and distal interphalangeal joint; nerve supply, the two radial muscles by the median, the two ulnar muscles by the ulnar.
Synonym(s): musculus lumbricalis manus [TA] .