Corpus: Middle pharyngeal constrictor muscle: Unterschied zwischen den Versionen

Aktuelle Version vom 8. August 2024, 09:31 Uhr

from Latin: constringere - to constrict and Greek: pharynx - throat

Definition

The middle pharyngeal constrictor muscle is a striated skeletal muscle, positioned as the middle of the three pharyngeal constrictors. It is joined cranially by the superior pharyngeal constrictor muscle and caudally by the inferior pharyngeal constrictor muscle.

Embryology

The middle pharyngeal constrictor muscle primarily develops from the muscle system of the 4th pharyngeal (gill) arch.

Anatomy

Classification

The middle pharyngeal constrictor muscle consists of two parts:

the chondropharyngeal part
the ceratopharyngeal part

Origin

The chondropharyngeal part originates from the lesser horn of the hyoid bone, while the ceratopharyngeal part originates from the greater horn of the hyoid bone.

Attachment

The fibers of the middle pharyngeal constrictor muscle extend obliquely upward, medially, and dorsally, merging with the fibers from the opposite side at the pharyngeal raphe. These fibers overlap the caudal fibers of the superior pharyngeal constrictor muscle in a manner similar to roof tiles.

Innervation

The middle pharyngeal constrictor muscle is innervated by the pharyngeal plexus, which includes contributions from the glossopharyngeal nerve (cranial nerve IX) and the vagus nerve (cranial nerve X).

Function

Swallowing

The middle pharyngeal constrictor muscle contracts to constrict the oropharynx (oral pharyngeal part), pushing the food bolus towards the esophagus during swallowing.

Phonetics

This muscle also plays a role in the formation of pharyngeal sounds, particularly in conjunction with the inferior pharyngeal constrictor muscle, and in the articulation of low, posterior vowels (such as "a").

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-{{Raw}}
 ''from Latin: constringere - to constrict and Greek: pharynx - throat''
 ==Definition==
-The '''Musculus constrictor pharyngis medius''' 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>
+The '''middle pharyngeal constrictor muscle''' is a striated [[Corpus:Muscle|skeletal muscle]], positioned as the middle of the three pharyngeal constrictors. It is joined cranially by the [[Corpus:Superior pharyngeal constrictor muscle|superior pharyngeal constrictor muscle]] and caudally by the [[Corpus:Inferior pharyngeal constrictor muscle|inferior pharyngeal constrictor muscle]]. <dcembed ratio="16x9"><dcEmbedUrl src="https://www.doccheck.com/de/detail/photos/43196-musculus-constrictor-pharyngis-medius"></dcEmbedUrl></dcembed>
 ==Embryology==
-The musculus constrictor pharyngis medius forms predominantly from the muscle anlage of the 4th gill arch.
+The middle pharyngeal constrictor muscle primarily develops from the muscle system of the 4th pharyngeal (gill) arch.
 ==Anatomy==
 ===Classification===
-The constrictor pharyngis medius muscle consists of two parts:
+The middle pharyngeal constrictor muscle consists of two parts:
-* Pars chondropharyngea
-* Pars ceratopharyngea
+* the chondropharyngeal part
+* the ceratopharyngeal part
 ===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).
+The chondropharyngeal part originates from the lesser horn of the [[Corpus:Hyoid bone|hyoid bone]], while the ceratopharyngeal part originates from the greater horn of the hyoid bone.
 ===Attachment===
-The fibres of the constrictor pharyngis medius 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 constrictor pharyngis superior muscle like a roof tile.
+The fibers of the middle pharyngeal constrictor muscle extend obliquely upward, medially, and dorsally, merging with the fibers from the opposite side at the [[Corpus:Pharyngeal raphe|pharyngeal raphe]]. These fibers overlap the caudal fibers of the superior pharyngeal constrictor muscle in a manner similar to roof tiles.
 ==Innervation==
-The constrictor pharyngis medius muscle is innervated by the pharyngeal plexus, a nerve plexus consisting of the glossopharyngeal nerve (IX nerve) and the vagus nerve (X nerve).
+The middle pharyngeal constrictor muscle is innervated by the [[Corpus:Pharyngeal plexus|pharyngeal plexus]], which includes contributions from the [[Corpus:Glossopharyngeal nerve|glossopharyngeal nerve]] (cranial nerve IX) and the [[Corpus:Vagus nerve|vagus nerve]] (cranial nerve X).
 ==Function==
 ===Swallowing===
-The contraction of the constrictor pharyngis medius muscle constricts the pars oralis pharyngis (oropharynx) and pushes the food bolus towards the oesophagus during swallowing.
+The middle pharyngeal constrictor muscle contracts to constrict the [[Corpus:Oropharynx|oropharynx]] (oral pharyngeal part), pushing the food bolus towards the [[Corpus:Esophagus|esophagus]] during swallowing.
 ===Phonetics===
-The constrictor pharyngis medius muscle is involved in the formation of pharyngeal sounds - especially laterally, with assumed involvement of the constrictor pharyngis inferior muscle - and low, posterior vowels (e.g. "a").
+This muscle also plays a role in the formation of pharyngeal sounds, particularly in conjunction with the inferior pharyngeal constrictor muscle, and in the articulation of low, posterior vowels (such as "a").
 [[Kategorie:Head]]
 [[Kategorie:Muscle]]
 [[Kategorie:Corpus]]
+[[Kategorie:Pharynx]]