Pronator Quadratus Muscle Function & Location – Human Anatomy | Kenhub

Pronator Quadratus Muscle Function & Location – Human Anatomy | Kenhub

Hello there! It’s Matt from Kenhub, and
in this tutorial, we will be discussing the pronator quadratus. The pronator quadratus
muscle is one of the three deep flexors of the forearm lying at the ventral forearm as
you see on this image. They run under the flexor digitorum superficialis close to the
radius and ulna and, for that reason, they are difficult to palpate. The pronator quadratus muscle arises from
the distal end of the ulna on the anterior surface and extends horizontally to the radius
attaching at the anterior margin at the distal quarter of the radius giving the muscle a
square-shaped appearance. The pronator quadratus is the deepest muscle in the anterior forearm. The median nerve serves as the innervation
for the pronator quadratus. The innervating branch, the anterior interosseus nerve, arises
approximately 5 cm underneath the medial epicondyle of the humerus from the median nerve. The deep flexors of the forearm are mainly
responsible for flexion of the hand and finger joints. The pronator quadratus pulls the radius
medially thus causing pronation at the radioulnar joint. So, this muscle is not so hard to remember.
It is a square-shaped muscle. Think quad that pronates the radioulnar joint. So, pronator
quadratus makes sense. 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!

4 Replies to “Pronator Quadratus Muscle Function & Location – Human Anatomy | Kenhub”

  1. Hi everyone! Hope we were able to shed some light on this topic and help you pick the right anatomy learning method for you. Tell us what's your favorite way of learning human anatomy? Also, don't forget to check out our fun video tutorials and interactive quizzes: All you need to kick some gluteus maximus in anatomy. Have fun learning! 😉

  2. Nice instructionals! I'm in occupational therapy program and this really helps. Thanks you and keep up the good work.

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