palmar interossei (interosseous muscles)
Definition: three intrinsic muscles in the hand; origin, first: ulnar side of second metacarpal; second and third: radial sides of fourth and fifth metacarpals; insertion, first: into ulnar side of index; second and third: into radial sides of ring and little fingers; action, adducts fingers toward axis of middle finger; nerve supply, ulnar.
Synonym(s): musculus interosseus palmarisTA, musculus interosseus volaris
See Also: flexor pollicis brevis (muscle)
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