Thyrohyoid muscle

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Thyrohyoid muscle
Muscles of the neck. Lateral view. (Thyrohyoideus labeled center-left.)
Muscles of the neck. Anterior view. (Thyrohyoideus visible center-left.)
Latin Musculus thyreohyoideus
Gray's p.394
Origin thyroid cartilage of larynx
Insertion    hyoid bone
Artery superior thyroid artery
Nerve first cervical nerve (C1) via hypoglossal nerve
Actions Elevates thyroid, depresses hyoid bone

The thyrohyoid muscle is a small, quadrilateral muscle appearing like an upward continuation of the sternothyreoideus. It belongs to the infrahyoid muscles group.

It arises from the oblique line on the lamina of the thyroid cartilage, and is inserted into the lower border of the greater cornu of the hyoid bone.

It is innervated by C1, which joins the hypoglossal nerve for a short distance, and depresses the hyoid and elevates the larynx.

Additional images

  • Hyoid bone. Anterior surface. Enlarged.

  • The veins of the thyroid gland.

  • Hypoglossal nerve, cervical plexus, and their branches.

  • The right brachial plexus with its short branches, viewed from in front.

  • Side view of the larynx, showing muscular attachments.

  • Thyrohyoid muscle

See also

External links

This article incorporates text from a public domain edition of Gray's Anatomy.

Cervical

CN VII (superficial, PC): platysma
CN XI (deep): sternocleidomastoid

C1–C6 (anterior): Prevertebral muscles: longus (capitis, colli)

C3–C8 (lateral): scalene (anterior, medius, posterior)
Suboccipital

C1: rectus capitis posterior (major, minor) · obliquus capitis (inferior, superior)

C1–C6 (anterior): Prevertebral muscles: rectus capitis (anterior, lateralis)
Suprahyoid
Infrahyoid/strap
Fasciae
Pharynx
Larynx

M: MUS, DF+DRCT

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noco (m, s, c)/cong (d)/tumr, sysi/epon, injr

proc, drug (M1A/3)

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