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Stylohyoid muscle

From Wikipedia, the free encyclopedia
Muscle in the neck
Stylohyoid
The stylohyoid among the triangles of the neck.
Muscles of the neck. Anterior view. Stylohyoid muscle in purple
Details
OriginStyloid process (temporal)
InsertionGreater cornu ofhyoid bone
NerveFacial nerve (CN VII)
ActionsElevate the hyoid during swallowing
Identifiers
Latinmusculus stylohyoideus
TA98A04.2.03.005
TA22164
FMA9625
Anatomical terms of muscle

Thestylohyoid muscle is one of thesuprahyoid muscles.[1] Its originates from the styloid process of thetemporal bone; it inserts onto hyoid bone. It is innervated by a branch of thefacial nerve. It acts to draw thehyoid bone upwards and backwards.

Structure

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The stylohyoid is aslendermuscle.[2] It is directed inferoanteriorly from its origin towards its insertion.[3]

It is perforated near its insertion by the intermediatetendon of thedigastric muscle.[3]

Origin

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The muscle arises from the posterior surface of thetemporal styloid process; it arises near the base of the process. It arises by a small tendon of origin.[3]

Insertion

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The muscle inserts onto thebody of hyoid bone at the junction of the body andgreater cornu.[3]

It passes anterior to the intermediate tendon of thedigastric muscle and is inserted immediately superior to that of the superior belly ofomohyoid muscle.[3]

Vasculature

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The stylohyoid muscle receives arterial supply branches of thefacial artery,posterior auricular artery, andoccipital artery.[3]

Innervation

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The stylohyoid muscle receives motor innervation from thestylohyoid branch offacial nerve (CN VII).[3]

Relations

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The muscle is situatedanterosuperior to the posterior belly of thedigastric muscle.[2]

Variation

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It may be absent or doubled. It may be situated medial to thecarotid artery. It may insert suprahyoid muscles of infrahyoid muscles.[3]

Actions/movements

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The stylohyoid muscle elevates and retracts the hyoid bone (i.e. draws it superiorly and posteriorly).[3]

Function

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[icon]
This sectionneeds expansion. You can help byadding missing information.(January 2018)

The stylohyoid muscle elongates the floor of the mouth.[3] It initiates a swallowing.[citation needed]

Additional images

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  • Left temporal bone. Outer surface.
    Left temporal bone. Outer surface.
  • Hyoid bone. Anterior surface. Enlarged.
    Hyoid bone. Anterior surface. Enlarged.
  • Superficial dissection of the right side of the neck, showing the carotid and subclavian arteries.
    Superficial dissection of the right side of the neck, showing the carotid and subclavian arteries.
  • Extrinsic muscles of the tongue. Left side.
    Extrinsic muscles of the tongue. Left side.
  • Stylohyoid muscle
    Stylohyoid muscle
  • Stylohyoid muscle
    Stylohyoid muscle

See also

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References

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Public domainThis article incorporates text in thepublic domain frompage 392 of the 20th edition ofGray's Anatomy(1918)

  1. ^Chokroverty, Sudhansu (2009-01-01), Chokroverty, Sudhansu (ed.),"Chapter 7 - Physiologic Changes in Sleep",Sleep Disorders Medicine (Third Edition), Philadelphia: W.B. Saunders, pp. 80–104,doi:10.1016/b978-0-7506-7584-0.00007-0,ISBN 978-0-7506-7584-0, retrieved2020-11-11{{citation}}: CS1 maint: work parameter with ISBN (link)
  2. ^abRea, Paul (2016-01-01), Rea, Paul (ed.),"Chapter 2 - Head",Essential Clinically Applied Anatomy of the Peripheral Nervous System in the Head and Neck, Academic Press, pp. 21–130,doi:10.1016/b978-0-12-803633-4.00002-8,ISBN 978-0-12-803633-4, retrieved2020-11-11{{citation}}: CS1 maint: work parameter with ISBN (link)
  3. ^abcdefghijStandring, Susan (2020).Gray's Anatomy: The Anatomical Basis of Clinical Practice (42nd ed.). New York. p. 581.ISBN 978-0-7020-7707-4.OCLC 1201341621.{{cite book}}: CS1 maint: location missing publisher (link)

External links

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

Cervical
Suboccipital
Suprahyoid
Infrahyoid
Pharynx
Larynx
Trachea
Fasciae
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