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Pharyngeal wall (muscular layer) (Outer circular layer (Superior (Aids in…
Pharyngeal wall (muscular layer)
Outer circular layer
Superior
Aids in velopharyngeal closure
Middle
Narrow diameter of pharynx, facilitate peristaltic mvm into oesophagus
Inferior
Reduce diameter of lower pharynx, facilitate peristaltic mvm into oesophagus
Innervation: Vagus nerve
Inner longitudinal layer
Palatopharyngeus
O: soft palate
I: thyroid cartilage of larynx
Elevates larynx, narrow pharynx, depresses soft palate
Salpingopharyngeus
O: cartilage surr auditory tube
I: thyroid cartilage
Elevates pharyngeal wall
Stylopharyngeus
O: styloid process of temporal bone
I: thyroid cartilage
elevates pharynx
Innervation: Branches of pharyngeal plexus-CNX