Pharynx Flashcards
Boundary between oral cavity and pharynx
Palatoglossal Arch
Difference in sensory between oral cavity and pharynx
Oral cavity is precise somatic sensory. Pharynx is imprecise visceral sensory.
Where can an infection in retropharyngeal space can spread unimpeded to
mediastinum (middle of thoracic cavity)
Origin of superior constrictor muscle
pterygo-mandibular raphe
Which constrictor muscle is continuous anteriorly with the buccinator
Superior Constrictor muscle
Origin of middle constrictor muscle
hyoid
Origin of inferior constrictor muscle
thyroid and cricoid cartilage
Origin of the stylopharyngeus
Styloid process of temporal bone
Insertion of stylopharyngeus
thyroid cartilage
Action of the stylopharyngeus
raise pharynx and pull walls laterally
Innervation of stylopharyngeus
Cranial Nerve IX
Divisions of the pharynx from top to bottom
Nasopharynx, oropharynx, and laryngopharynx
Location of the pharyngeal tonsils and opening of auditory tube
Nasopharynx
Location of palatine tonsils
oropharynx
Location of (Epiglottic) valleculae
oropharynx
Two places where foreign objects / food often get caught in the pharynx
Valleculae and Piriform recess
Location of piriform recess
laryngopharynx
Found lateral to inlet of larynx in the laryngopharynx
piriform recess
Found between medial and lateral glossoepiglottic folds
Valleculae
Motor innervation to pharynx
Branchiomotor. All from Vagus (X) except Stylopharyngeus muscle (IX)
Sensory innervation to the nasopharynx
CN VII
Sensory innervation to the oropharynx
CN IX
Sensory innervation to the laryngopharynx
CN X
Blood supplied to the pharynx from these four arteries..
Ascending pharyngeal, facial, lingual, and maxillary arteries
Venous drainage from pharynx
Pharyngeal plexus to internal jugular vein
