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Temporal styloid process

From Wikipedia, the free encyclopedia
Temporal styloid process
Right side of the skull. Styloid process shown in red
Right temporal bone and mandible (styloid process labeled at bottom)
Details
Identifiers
Latinprocessus styloideus ossis temporalis
TA98A02.1.06.047
TA2683
FMA52877
Anatomical terms of bone

The temporal styloid process is a slender bony process of the temporal bone extending downward and forward from the undersurface of the temporal bone[1] just below the ear.[citation needed] The styloid process gives attachments to several muscles, and ligaments.

Structure

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The styloid process is a slender and pointed bony process of the temporal bone projecting anteroinferiorly from the inferior surface of the temporal bone[1] just below the ear.[citation needed] Its length normally ranges from just under 3 cm to just over 4 cm. It is usually nearly straight, but may be curved in some individuals.[1]

Its proximal (tympanohyal) part is ensheathed by the tympanic part of the temporal bone (vaginal process), whereas its distal (stylohyal) part gives attachment to several structures.[1]

Attachments

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The styloid process gives attachments to several muscles, and ligaments.[1] It serves as an anchor point for several muscles associated with the tongue and larynx.[citation needed]

Relations

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The parotid gland is situated laterally to the styloid process, the external carotid artery passes by its apex, the facial nerve crosses its base, and the attachment of the stylopharyngeus muscle separates it from the internal jugular vein medially.[1]

Development

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The styloid process arises from endochondral ossification of the cartilage from the second pharyngeal arch.[citation needed]

Clinical significance

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A small percentage of the population will suffer from an elongation of the styloid process and stylohyoid ligament calcification. This condition is also known as Eagle syndrome. The tissues in the throat rub on the styloid process during the act of swallowing with resulting pain along the glossopharyngeal nerve. There is also pain upon turning the head or extending the tongue. Other symptoms may include voice alteration, cough, dizziness, migraines, occipital neuralgia, pain in teeth and jaw and sinusitis or bloodshot eyes.[citation needed]

Additional images

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References

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  1. ^ a b c d e f Gray's anatomy : the anatomical basis of clinical practice. Susan Standring (Forty-second ed.). [New York]. 2021. p. 737. ISBN 978-0-7020-7707-4. OCLC 1201341621.{{cite book}}: CS1 maint: location missing publisher (link) CS1 maint: others (link)

Public domain This article incorporates text in the public domain from page 145 of the 20th edition of Gray's Anatomy (1918)

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