Stylohyoid muscle
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The stylohyoid muscle is one of the suprahyoid muscles.[1] Its originates from the styloid process of the temporal bone; it inserts onto hyoid bone. It is innervated by a branch of the facial nerve. It acts draw the hyoid bone upwards and backwards.
Structure
The stylohyoid is a slender muscle.[2] It is directed inferoanteriorly from its origin towards its insertion.[3]
It is perforated near its insertion by the intermediate tendon of the digastric muscle.[3]
Origin
The muscle arises from the posterior surface of the temporal styloid process; it arises near the base of the process. It arises by a small tendon of origin.[3]
Insertion
The muscle inserts onto the body of hyoid bone at the junction of the body and greater cornu.[3]
It passes anterior to the intermediate tendon of the digastric muscle and is inserted immediately superior to that of the superior belly of omohyoid muscle.[3]
Vasculature
The stylohyoid muscle receives arterial supply branches of the facial artery, posterior auricular artery, and occipital artery.[3]
Innervation
The stylohyoid muscle receives motor innervation from the stylohyoid branch of facial nerve (CN VII).[3]
Relations
The muscle is situated anterosuperior to the posterior belly of the digastric muscle.[2]
Variation
It may be absent or doubled. It may be situated medial to the carotid artery. It may insert suprahyoid muscles of infrahyoid muscles.[3]
Actions/movements
The stylohyoid muscle elevates and retracts the hyoid bone (i.e. draws it superiorly and posteriorly).[3]
Function
Script error: No such module "Unsubst". The stylohyoid muscle elongates the floor of the mouth.[3] It initiates a swallowing.Script error: No such module "Unsubst".
Additional images
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Left temporal bone. Outer surface.
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Hyoid bone. Anterior surface. Enlarged.
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Superficial dissection of the right side of the neck, showing the carotid and subclavian arteries.
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Extrinsic muscles of the tongue. Left side.
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Stylohyoid muscle
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Stylohyoid muscle
See also
References
Public domain This article incorporates text in the public domain from Template:Wikidatathe 20th edition of Gray's Anatomy (1918) Template:Main other Template:Reflist
External links
Anatomy figure: 34:02-04 at Human Anatomy Online, SUNY Downstate Medical Center
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