The palatopharyngeus forms the palatopharyngeal arch (posterior pillar of the fauces) and connects the soft palate to the pharyngeal wall and larynx. Its palatine origin means it depresses the soft palate while its insertion into the thyroid cartilage elevates the larynx, making it act simultaneously on two structures to coordinate swallowing. The posterior pillar is the landmark for posterior tonsillectomy incisions.
| Origin | Palatine aponeurosis and posterior hard palate |
|---|---|
| Insertion | Blends with the pharyngeal constrictors and inserts on the posterior thyroid cartilage lamina |
| Nerve Supply | Pharyngeal plexus via the vagus nerve (CN X) |
| Blood Supply | Ascending palatine artery |
| Actions | Depresses the soft palate; Elevates the larynx and pharynx during swallowing; Narrows the fauces (oropharyngeal isthmus) |
|---|
During swallowing the palatopharyngeus simultaneously helps narrow the soft palate descent while pulling the larynx superiorly, coordinating the two movements needed to seal the nasopharynx and protect the airway.
Velopharyngeal insufficiency from palatopharyngeus weakness produces hypernasal speech and nasal regurgitation. Palatopharyngeal arch asymmetry (curtain sign) with the normal side pulling toward it during phonation indicates unilateral palatopharyngeus palsy from vagal nerve involvement. Pharyngeal flap surgery uses a superiorly based flap from the posterior pharyngeal wall to augment the palatopharyngeus repair in severe velopharyngeal insufficiency.
Not externally palpable. Visible as the posterior tonsillar pillar fold on oral examination and assessed by nasopharyngoscopy.
Vagal nerve palsy producing palatopharyngeus paresis contributing to velopharyngeal insufficiency and dysphagia.
