Hyoglossus

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Hyoglossus
Hyoglossus.png
Extrinsic muscles of the tongue. Left side. (Hyoglossus visible at center.)
Hyoglossal muscle.PNG
Muscles of the neck. Anterior view. Hyoglossal muscle in purple
Details
Origin Hyoid
Insertion side of the tongue
Nerve Hypoglossal (CN XII)
Actions depresses and retracts the tongue
Identifiers
Latin musculus hyoglossus
Dorlands
/Elsevier
m_22/12549261
TA A05.1.04.102
FMA 46691
Anatomical terms of muscle

The hyoglossus, thin and quadrilateral, arises from the side of the body and from the whole length of the greater cornu of the hyoid bone, and passes almost vertically upward to enter the side of the tongue, between the styloglossus and the inferior longitudinal muscle of the tongue. It forms a part of the floor of submandibular triangle.

Structure[edit]

The fibers arising from the body of the hyoid bone overlap those from the greater cornu.

Structures that are medial/deep to the hyoglossus are the glossopharyngeal nerve (cranial nerve 9), the stylohyoid ligament and the lingual artery and lingual vein.

The lingual vein passes medial to the hyoglossus, and the lingual artery passes deep to the hyoglossus. Laterally, in between the hyoglossus muscle and the mylohyoid muscle lay several important structures (from upper to lower): sublingual gland, submandibular duct, lingual nerve, vena comitans of hypoglossal nerve, and the hypoglossal nerve. Note, posteriorly, the lingual nerve is superior to the submandibular duct and a portion of the submandibular salivary gland protrudes into the space between the hyoglossus and mylohyoid muscles.

Function[edit]

The hyoglossus depresses and retracts the tongue and makes the dorsum more convex.

Additional images[edit]

References[edit]

This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)

External links[edit]