adductor pollicis muscle
anatomy
Quick Summary
The adductor pollicis is an intrinsic muscle of the hand, meaning it originates and inserts within the hand itself. It is located on the palm side of the hand, below the thumb, but is distinct from the thenar eminence muscles. Its primary action is to adduct the thumb, drawing it towards the middle finger. This muscle plays a role in fine motor control and grip strength. The adductor pollicis is innervated by the ulnar nerve.1
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