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Adductor pollicis

The adductor pollicis is a large triangular muscle located in the hand. Together with other muscles, it is part of the fleshy mass in the first web space of the hand, between the thumb and index finger. It is fan-shaped, and flat. It is involved in the movement of the hand and fingers. Its specific function is to move the thumb closer to the palm of the hand. It is especially useful in gripping. The adductor pollicis is powered by the deep branch of the ulnar nerve (T1). It receives nutrients from the deep palmar arterial arch. The muscle has two heads: the oblique and transverse. The oblique head originates at the capitate bone at the center of the wrist, as well as the second and third metacarpals, which are also in the wrist. The transverse head originates at the third metacarpal. The muscle attaches at the inner base of the proximal phalanx in the thumb, which is the bone in the thumb that is closest to the palm.

Written and medically reviewed by the Healthline Editorial Team
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In Depth: Adductor pollicis

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