Anatomy Pharynx

Question 1

Nerve supply to pharynx

Answer 1

Motor:
❑Pharyngeal plexus (cranial accessory through vagus) except
stylopharyngeus (glossopharyngeal).
Sensory:
❑Nasopharynx → mainly by the maxillary nerve (pharyngeal branch of sphenopalatine ganglion)
❑Oropharynx → mainly by the glossopharyngeal nerve
❑Laryngopharynx → by the internal laryngeal branch of the vagus nerve

Question 2

Main blood supply of palatine tonsils

Answer 2

Tonsillar branch of facial artery: It pierces superior constrictor muscle of pharynx

Question 3

Venous drainage of palatine tomsills and risks associated with it

Answer 3

one or more veins traverse the superior constrictor muscle to join the Paratonsillar,
pharyngeal or facial veins.

Risk: severe hge. During tonsillectomy due to injury of paratonsillar vein

Question 4

What is killian triangle and what is its related clinical application

Answer 4

is a triangular area in the wall of the pharynx between
the Cricopharyngeus and Thyropharyngeus which are
the two parts of the inferior constrictors.

Clinical app: zinker Diverticulum

Question 5

Blood supply of pharynx

Answer 5

1. Ascending pharyngeal artery: From external carotid artery.
2. Pharyngeal branch of maxillary artery.
3. Ascending palatine branch of facial artery.