Sternothyroid Muscle Origin and Insertion – Human Anatomy | Kenhub

Sternothyroid Muscle Origin and Insertion – Human Anatomy | Kenhub

Hello again everyone! It’s Matt from Kenhub,
and today, we will be discussing the sternothyroid. The infrahyoid muscles are a group of four
muscles under the hyoid bone attaching to the sternum, larynx, and scapula. They are
the omohyoid, the thyrohyoid, the sternohyoid, and the sternothyroid. The sternothyroid muscle originates from the
dorsal surface of the manubrium. It has its insertion on the oblique line of thyroid cartilage.
That is why the sternothyroid is the only hyoid muscle that does not directly attach
to the hyoid bone. The sternothyroid lies in close relation to the capsule of the thyroid
gland. All four infrahyoid muscles are supplied by
the deep ansa cervicalis which arises from the cervical plexus. The infrahyoid muscles
are responsible for the positioning of the hyoid bone along with the suprahyoid muscles.
They play an active role in swallowing and the movement of the larynx. The sternothyroid
depresses the larynx whereas the thyrohyoid elevates it when the hyoid bone is fixed. 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!

One Reply to “Sternothyroid Muscle Origin and Insertion – Human Anatomy | Kenhub”

  1. Hi everyone! Hope you enjoyed this sneak peek at our video on the sternothyroid muscle. There is still a lot more to go through, though, so don't stop learning! If you're not a Kenhub Premium member yet, we have this free article which covers the neck muscles in great detail: Hope to see you there!

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