Inferior pharyngis constrictor muscle
| Inferior pharyngis constrictor muscle |
|---|
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| Inferior pharyngis constrictor muscle |
| origin |
| Pars thyropharyngea (musculi constrictoris pharyngis inferioris): - Linea obliqua cartilaginis thyroideae Pars cricopharyngea (musculi constrictoris pharyngis inferioris): |
| approach |
| Raphe pharyngis |
| function |
| Constriction of the pars laryngea pharyngis:
advances the food bolus towards the esophagus during the act of swallowing |
| Innervation |
|
Pharyngeal plexus :
Glossopharyngeal nerve (cranial nerve IX) |
The musculus constrictor pharyngis inferior ( Latin for "lower throat constrictor "; from Latin musculus "muscle" and constringere "to tighten ", "to constrict " , from Greek phárynx "throat" and from Latin inferior "lower", "lower"), which is also known under the name Musculus cricopharyngeus (from Greek cricoideus "ring-shaped"), in German lower throat constrictor , is a fan-shaped, striated muscle ( skeletal muscle ) which, together with the muscles constrictores pharyngis superior et medius, forms the muscular part of the throat . It is particularly prominent in its dorsal and lateral areas.
On the dorsal wall of the pharynx, the paired muscle parts are connected to each other by the pharyngeal raphe , which also serves as an attachment for the throat constricters.
The muscle can be further divided into one:
- Pars thyropharyngea
- Pars cricopharyngea (with pars obliqua and pars fundiformis , which form the Killian triangle . Zenker's diverticulum can arise here)
function
The inferior constrictor pharyngis muscle constricts the larynx section of the pharynx ( pars laryngea pharyngis ) and pushes the food bolus towards the esophagus during the act of swallowing .
Diseases
A hypertrophy of the musculus cricopharyngeus can lead to dysphagia lead. Failure to relax the muscle leads to cricopharyngeal achalasia .
swell
- Human muscles in tables (H. Jastrow, University of Mainz)