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Hi everyone! It’s Matt from Kenhub, and
in this tutorial, we will be discussing the adductor pollicis muscle. The adductor pollicis
which you see on this image highlighted in green is part of the thenar musculature which
consists of four muscles located on the radial side of the palm. Together, they form the
ball of the thumb known as the thenar eminence. They originate at different carpal bones and
distally attached to the thumb. The adductor pollicis muscle is made up of a transverse
head and an oblique head. In this tutorial, we will look at the origin, insertion, innervation
and function of the adductor pollicis muscle. The adductor pollicis muscle has two origin
surfaces. The transverse head originates from the palmar base of the third metacarpal bone.
The oblique head arises from the capitate bone and the palmar bases of the second and
third metacarpal bones. The common tendon attaches distally to the proximal phalanx
and the dorsal aponeurosis of the thumb via the ulnar sesamoid bone. The adductor pollicis
is the deepest of all thenar muscles. The adductor pollicis is supplied by the deep
branch of the ulnar nerve. The main function of each thenar muscle is associated to their
names. The powerful contraction of the adductor pollicis moves the thumb towards the hand
or what we call adduction. The muscle also causes opposition of the thumb. Since the
abductor pollicis brevis, adductor pollicis and flexor pollicis brevis attach more distally
at the thumb, they can also perform an extension at the interphalangeal joint. This video is more fun than reading a textbook,
right? If you want more videos, interactive quizzes, articles, and an atlas of human anatomy,
click on the “Take me to Kenhub” button. It is time to say goodbye to your old textbooks
and say hello to your new anatomy learning partner, Kenhub! See you there!

10 thoughts on “Adductor Pollicis Muscle – Origin & Function – Human Anatomy | Kenhub

  1. Hi guys! Was this fun or what? Let us know on the comments what you enjoyed on this video. But wait! You're not done yet. There is still a lot you can do to learn this topic. Check out our quizzes, related articles and atlas sections on the thenar muscles: Once you go through that, you'll be able to call yourself a master on the thenar muscles. Have fun learning!

  2. Is it normal for my adductor pollicis to be really sore the next few days after splitting fire wood with a maul? I feel like the intense gripping and vibrations sent up the handle put tons of minor tears in your adductor pollicis and make it very sore. The right palm considerably more sore than the left.

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