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==Definition== | ==Definition== | ||
The ''' | The '''middle pharyingeal constrictor muscle''' is a striated skeletal muscle and the middle of the three constrictors of the pharyngeal musculature. It is joined cranially by the constrictor pharyngis superior muscle and caudally by the constrictor pharyngis inferior muscle.<dcembed ratio="16x9"><dcEmbedUrl src="https://www.doccheck.com/de/detail/photos/43196-musculus-constrictor-pharyngis-medius"></dcEmbedUrl></dcembed> | ||
==Embryology== | ==Embryology== | ||
The | The middle pharyingeal constrictor muscle forms predominantly from the muscle system of the 4th gill arch. | ||
==Anatomy== | ==Anatomy== | ||
===Classification=== | ===Classification=== | ||
The constrictor | The middle pharyingeal constrictor muscle consists of two parts: | ||
* Pars chondropharyngea | * Pars chondropharyngea | ||
* Pars ceratopharyngea | * Pars ceratopharyngea | ||
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===Attachment=== | ===Attachment=== | ||
The fibres of the constrictor | The fibres of the middle pharyingeal constrictor muscle extend obliquely cranially, medially and dorsally and connect with the fibres of the muscle on the opposite side in the pharyngeal raphe. They overlap the caudal fibres of the superior pharyngeal constrictor muscle like a roof tile. | ||
==Innervation== | ==Innervation== | ||
The constrictor | The middle pharyingeal constrictor muscle is innervated by the pharyngeal plexus, a nerve plexus consisting of the glossopharyngeal nerve (IX nerve) and the vagus nerve (X nerve). | ||
==Function== | ==Function== | ||
===Swallowing=== | ===Swallowing=== | ||
The contraction of the constrictor | The contraction of the middle pharyingeal constrictor muscle constricts the pars oralis pharyngis (oropharynx) and pushes the food bolus towards the oesophagus during swallowing. | ||
===Phonetics=== | ===Phonetics=== | ||
The constrictor | The middle pharyingeal constrictor muscle is involved in the formation of pharyngeal sounds - especially laterally, with assumed involvement of the inferior pharyingeal constrictor muscle - and low, posterior vowels (e.g. "a"). | ||
[[Kategorie:Head]] | [[Kategorie:Head]] | ||
[[Kategorie:Muscle]] | [[Kategorie:Muscle]] | ||
[[Kategorie:Corpus]] | [[Kategorie:Corpus]] | ||
Version vom 22. Juli 2024, 07:11 Uhr
This text has been translated by an AI and may sound raw. It will be reviewed shortly. Thank you for your patience!
This text has been translated by an AI and may sound raw. It will be reviewed shortly. Thank you for your patience!
from Latin: constringere - to constrict and Greek: pharynx - throat
Definition
The middle pharyingeal constrictor muscle is a striated skeletal muscle and the middle of the three constrictors of the pharyngeal musculature. It is joined cranially by the constrictor pharyngis superior muscle and caudally by the constrictor pharyngis inferior muscle.
Embryology
The middle pharyingeal constrictor muscle forms predominantly from the muscle system of the 4th gill arch.
Anatomy
Classification
The middle pharyingeal constrictor muscle consists of two parts:
- Pars chondropharyngea
- Pars ceratopharyngea
Origin
The pars chondropharyngea has its origin at the small horn (cornu minus) of the hyoid bone (os hyoideum), the pars ceratopharyngea at the large horn of the hyoid bone (cornu majus).
Attachment
The fibres of the middle pharyingeal constrictor muscle extend obliquely cranially, medially and dorsally and connect with the fibres of the muscle on the opposite side in the pharyngeal raphe. They overlap the caudal fibres of the superior pharyngeal constrictor muscle like a roof tile.
Innervation
The middle pharyingeal constrictor muscle is innervated by the pharyngeal plexus, a nerve plexus consisting of the glossopharyngeal nerve (IX nerve) and the vagus nerve (X nerve).
Function
Swallowing
The contraction of the middle pharyingeal constrictor muscle constricts the pars oralis pharyngis (oropharynx) and pushes the food bolus towards the oesophagus during swallowing.
Phonetics
The middle pharyingeal constrictor muscle is involved in the formation of pharyngeal sounds - especially laterally, with assumed involvement of the inferior pharyingeal constrictor muscle - and low, posterior vowels (e.g. "a").