Short muscle draining the thumb of the hand
Short muscle that removes the thumb of the hand , m. Abductor pollicis brevis, lies on the side of the elevation of the thumb of the hand, directly under the skin. It originates from the tendon of the long muscle, which removes the thumb of the hand, the fascia of the forearm, from the scaphoid of the scaphoid bone and the flexor retainer; Is attached to the lateral surface of the base of the proximal phalanx of the thumb of the hand. In its tendon is usually sesamoid bone.
Function: withdraws the thumb of the hand, slightly opposing it, and takes part in the bending of the proximal phalanx.
Innervation: n. Medianus (CVI-CVII).
Blood supply: r. Palmaris superficialis, a. Radialis.
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