• Source: Stylohyoid muscle

The stylohyoid muscle is one of the suprahyoid muscles. 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. It is directed inferoanteriorly from its origin towards its insertion.
It is perforated near its insertion by the intermediate tendon of the digastric muscle.




= Origin

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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.




= Insertion

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The muscle inserts onto the body of hyoid bone at the junction of the body and greater cornu.
The site of insertion is situated immediately superior to that of the superior belly of omohyoid muscle.




= Vasculature

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The stylohyoid muscle receives arterial supply branches of the facial artery, posterior auricular artery, and occipital artery.




= Innervation

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The stylohyoid muscle receives motor innervation from the stylohyoid branch of facial nerve (CN VII).




= Relations

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The muscle is situated anterosuperior to the posterior belly of the digastric muscle.




= Variation

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It may be absent or doubled. It may be situated medial to the carotid artery. It may insert suprahyoid muscles of infrahyoid muscles.




= Actions/movements

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The stylohyoid muscle elevates and retracts the hyoid bone (i.e. draws it superiorly and posteriorly).




Function



The stylohyoid muscle elongates the floor of the mouth. It initiates a swallowing.




Additional images































See also


Stylohyoid ligament




References


This article incorporates text in the public domain from page 392 of the 20th edition of Gray's Anatomy (1918)




External links


Anatomy figure: 34:02-04 at Human Anatomy Online, SUNY Downstate Medical Center

Kata Kunci Pencarian:

• Stylohyoid muscle
• Hyoid bone
• Suprahyoid muscles
• Facial nerve
• Cervical lymph nodes
• Facial muscles
• Stylohyoid branch of facial nerve
• Temporal styloid process
• Eagle syndrome
• Pharyngeal arch