From Surf Wiki (app.surf) — the open knowledge base

Thyrohyoid muscle

Neck muscle that depresses the hyoid bone and elevates the larynx

Field	Value
Name	Thyrohyoid muscle
Latin	musculus thyrohyoideus
Image	Thyrohyoid muscle.PNG
Caption	Muscles of the neck. Lateral view. (Thyrohyoideus labeled center-left.)
Image2	Thyrohyoideus.png
Caption2	Muscles of the neck. Anterior view. (Thyrohyoideus visible center-left.)
Origin	Thyroid cartilage of the larynx
Insertion	Hyoid bone
Action	Elevates thyroid and depresses the hyoid bone
Blood	Superior thyroid artery
Nerve	First cervical nerve (C1) via hypoglossal nerve

The thyrohyoid muscle is a small skeletal muscle of the neck. Above, it attaches onto the greater cornu of the hyoid bone; below, it attaches onto the oblique line of the thyroid cartilage. It is innervated by fibres derived from the cervical spinal nerve 1 that run with the hypoglossal nerve (CN XII) to reach this muscle. The thyrohyoid muscle depresses the hyoid bone and elevates the larynx during swallowing. By controlling the position and shape of the larynx, it aids in making sound.

Structure

The thyrohyoid muscle is a small, broad and short muscle. It is quadrilateral in shape. It may be considered a superior-ward continuation of sternothyroid muscle.

It belongs to the infrahyoid muscles group and the outer laryngeal muscle group.

Attachments

Its superior attachment is the inferior border of the greater cornu of the hyoid bone and adjacent portions of the body of hyoid bone.

Its inferior attachment is the oblique line of the thyroid cartilage (alongside the sternothyroid muscle).

Innervation

The thyrohyoid muscle is innervated (along with the geniohyoid muscle) by a branch of the cervical plexus - the nerve to thyrohyoid muscle (thyrohyoid branch of ansa cervicalis) - which is formed by fibres of the cervical spinal nerve 1 (C1) (and - according to some sources - cervical spinal nerve 2 as well) that join and travel with the hypoglossal nerve (CN XII) before splitting away from it distal to the superior root of ansa cervicalis. The thyrohyoid muscle is the only infrahyoid muscle that is not innervated via the ansa cervicalis.

Blood supply

The muscle is provided with arterial blood by branches of the superior thyroid artery, and of the lingual artery.

Relations

The thyrohyoid muscle forms the inferior boundary of the carotid triangle. It is situated deep to (beneath) the (depending upon the source) superior portion of/superior belly of the sternohyoid muscle, and the superior portion of the omohyoid muscle.

Function

The thyrohyoid muscle depresses and fixates the hyoid bone. It elevates the larynx during swallowing. By controlling the position and shape of the larynx, it aids in making sound.

Additional images

References

Standring, Susan. (2020). "Gray's Anatomy: The Anatomical Basis of Clinical Practice".
Sinnatamby, Chummy S.. (2011). "Last's Anatomy". Elsevier Australia.
(2018). "Sobotta Anatomy Textbook: English Edition with Latin Nomenclature". Elsevier.
"ramus thyrohyoideus ansae cervicalis".
(2009). "Diagnostic Surgical Pathology of the Head and Neck". [[Saunders (imprint).
Hage, Steffen R.. (2010). "Handbook of Behavioral Neuroscience". [[Academic Press]].

Info: Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

muscles-of-the-head-and-neck

Want to explore this topic further?

Ask Mako anything about Thyrohyoid muscle — get instant answers, deeper analysis, and related topics.

Research with Mako

Free with your Surf account

Content sourced from Wikipedia, available under CC BY-SA 4.0.

This content may have been generated or modified by AI. CloudSurf Software LLC is not responsible for the accuracy, completeness, or reliability of AI-generated content. Always verify important information from primary sources.

Report