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What is Sternohyoid?

Published in Anatomy 2 mins read

The sternohyoid is a long, thin muscle located in the front of the neck. It runs from the sternum (breastbone) to the hyoid bone, which is a small, U-shaped bone located in the neck.

Function of the Sternohyoid

The sternohyoid muscle plays a crucial role in depressing the hyoid bone, which helps with:

  • Swallowing: When you swallow, the hyoid bone moves upward, and the sternohyoid helps to pull it back down.
  • Speech: The sternohyoid also helps to stabilize the hyoid bone, which is important for clear speech.
  • Head movement: Although its primary function is not related to head movement, the sternohyoid can assist with tilting the head backward.

Anatomy of the Sternohyoid

  • Origin: The sternohyoid originates from the superior surface of the manubrium of the sternum, which is the upper part of the breastbone.
  • Insertion: It inserts into the inferior border of the body of the hyoid bone.
  • Nerve Supply: The sternohyoid is innervated by the ansa cervicalis, a loop of nerves that arises from the cervical plexus.
  • Blood Supply: The sternohyoid receives blood supply from the superior thyroid artery.

Clinical Significance

  • Injury: Injury to the sternohyoid can lead to difficulty swallowing or speaking.
  • Surgery: The sternohyoid muscle may be used in reconstructive surgery, such as in cases of facial trauma.