Anconeus Muscle – Origin, Insertion & Innervation – Human Anatomy | Kenhub

Anconeus Muscle – Origin, Insertion & Innervation – Human Anatomy | Kenhub

Hello everyone! This is Matt from Kenhub,
and in this tutorial, we will discuss the anconeus muscle, its origin, innervations,
and function. The anconeus muscle is a small triangular
muscle located at the elbow. It originates at the dorsal side of the lateral epicondyle
of the humerus, and the fibers of the origin tendon also connect with the dorsal joint
capsule. The muscle, then, inserts at the olecranon of the ulna. Here, again, you see
the muscle highlighted in green and see how it’s connected at its origin and insertion. The anconeus is easily palpated at the dorsal
lateral side of the forearm because it is located superficially. If you place your fingers
on the dorsal lateral aspect, just distal to the elbow, you can feel it. And it will
be more pronounced if the forearm extends with resistance. The anconeus is supplied by a motor branch
of the radial nerve which arises at the radial sulcus of the humerus, continues through the
medial head of the triceps, and finally reaches the muscle distally. Shown here from the anterior view, you can
see the radial nerve extending through the forearm. Both morphologically and functionally,
the anconeus is really a continuation of the triceps. Not only are they supplied by the
same nerve, but both muscles are often either partly or completely blended together. The anconeus does essentially the same job
the triceps does when it comes to the elbow. Its contraction leads to the extension of
the forearm. Furthermore, it supports the tension of the dorsal joint capsule, thus,
preventing damage during hyperextension. It is believed that the anconeus has the additional
function of stabilizing the ulna, especially when the forearm is pronated. 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!

6 Replies to “Anconeus Muscle – Origin, Insertion & Innervation – Human Anatomy | Kenhub”

  1. This is the first time I've seen this site. Very well made. Explanation and visuals are very helpful. Studying for a test is better like this.

  2. Hey there! Hope this short video tutorial helped you master the anatomy of the anconeus muscle! Remember you can read lots more about the anconeus muscle right here in this article!

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