The muscle that opposes the thumb of the hand
The muscle that opposes the thumb of the hand , m. Opponens pollicis, has the form of a thin triangular plate and lies under m. Abductor pollicis brevis. It starts from the hump of the trapezoid bone and flexor retainer, attached to the outer margin of the first metacarpal bone.
Function: Opposes the thumb of the hand to the little finger.
Innervation: n. Medianus (CVI-CVII).
Blood supply: r. Palmaris superficialis, a. Radialis, arcus palmaris profundus.
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