Corpus: Middle pharyngeal constrictor muscle: Unterschied zwischen den Versionen
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''from Latin: constringere - to constrict and Greek: pharynx - throat'' | ''from Latin: constringere - to constrict and Greek: pharynx - throat'' | ||
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The middle pharyngeal constrictor muscle consists of two parts: | The middle pharyngeal constrictor muscle consists of two parts: | ||
* the | * the chondropharyngeal part | ||
* the | * the ceratopharyngeal part | ||
===Origin=== | ===Origin=== | ||
The | 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=== | ===Attachment=== | ||
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==Function== | ==Function== | ||
===Swallowing=== | ===Swallowing=== | ||
The middle pharyngeal constrictor muscle contracts to constrict the [[Corpus:Oropharynx|oropharynx]] ( | 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=== | ===Phonetics=== | ||
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").