Superior pharyngeal constrictor muscle
3101575
208345872
2008-04-26T16:36:29Z
Semicarbazide
3038540
/* Origin and insertion */
{{Muscle infobox |
Name = Superior pharyngeal constrictor muscle |
Latin = musculus constrictor pharyngis superior |
GraySubject = 244 |
GrayPage = 1143 |
Image = Musculusconstrictorpharyngissuperior.png |
Caption = Muscles of the [[pharynx]] and [[cheek]]. |
Image2 = Gray1031.png |
Caption2 = Muscles of the pharynx, viewed from behind, together with the associated vessels and nerves. |
Origin = [[medial pterygoid plate]], [[pterygomandibular raphé]], [[alveolar process]] |
Insertion = [[pharyngeal raphe]], [[pharyngeal tubercle]] |
Blood = |
Nerve = [[Vagus nerve]] |
Action = Swallowing |
MeshName = |
MeshNumber = |
DorlandsPre = m_22 |
DorlandsSuf = 12548650 |
}}
The '''superior pharyngeal constrictor muscle''' is a quadrilateral muscle, thinner and paler than the [[inferior pharyngeal constrictor muscle]] and [[middle pharyngeal constrictor muscle]].
==Origin and insertion==
The four parts of this muscle arise from:<br />
- the lower third of the posterior margin of the [[medial pterygoid plate]] and its [[hamulus]] ('''Pterygopharyngeal part''')<br />
- from the [[pterygomandibular raphé]] ('''Buccopharyngeal part''')<br />
- from the [[alveolar process]] of the [[mandible]] above the posterior end of the [[mylohyoid line]] ('''Myolopharyngeal part''')<br />
- and by a few fibers from the side of the [[tongue]] ('''Glossopharyngeal part''')<br />
The fibers curve backward to be inserted into the [[median raphé]], being also prolonged by means of an [[aponeurosis]] to the [[pharyngeal spine]] on the basilar part of the [[occipital bone]].
The superior fibers arch beneath the [[levator veli palatini]] muscle and the [[Eustachian tube]].
==Relations==
The interval between the upper border of the muscle and the base of the skull is closed by the pharyngeal aponeurosis, and is known as the sinus of Morgagni.
==Action==
As soon as the [[Bolus (digestion)|bolus]] of food is received in the pharynx, the elevator muscles relax, the pharynx descends, and the constrictores contract upon the bolus, and convey it downward into the esophagus.
==Additional images==
<gallery>
Image:Gray129.png|Occipital bone. Outer surface.
Image:Gray177.png|Mandible. Inner surface. Side view.
Image:Gray513.png|The internal carotid and vertebral arteries. Right side.
Image:Gray1028.png|Dissection of the muscles of the palate from behind.
</gallery>
==External links==
* {{GPnotebook|26869838}}
* {{MuscleLoyola|scon}}
* {{NormanAnatomy|lesson8}} ({{NormanAnatomyFig|latpharyngealitems3}})
* {{RocheLexicon|05287.011-1}}
{{Gray's}}
{{muscle-stub}}
{{Muscles_of_head}}
[[Category:Muscles of the head and neck]]
[[de:Musculus constrictor pharyngis superior]]
[[fr:Muscle constricteur du pharynx]]
[[hu:Felső garat-összeszorító izom]]
[[sr:Мишић горњи констриктор ждрела]]
[[sh:Mišić gornji konstriktor ždrela]]