The adductor pollicis muscle is a muscle located in the hand. It is one of several muscles that make up the deep muscle group of the intrinsic muscles of the hand, which are responsible for moving the fingers and thumb. The adductor pollicis muscle is responsible for adducting the thumb, which means it helps to move the thumb towards the midline of the body. This movement is important for grasping and holding objects.

The adductor pollicis muscle has two heads: the oblique head and the transverse head. The oblique head originates from the capitate and third metacarpal bones, and inserts onto the lateral aspect of the base of the proximal phalanx of the thumb. The transverse head originates from the bases of the second, third, and fourth metacarpal bones, and inserts onto the lateral aspect of the base of the proximal phalanx of the thumb.

One example of how the adductor pollicis muscle is used is when you make a fist. To do this, you need to adduct your thumb towards your fingers, which is facilitated by the adductor pollicis muscle. This movement allows you to grip objects tightly and hold them securely.

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