Pharynx Flashcards
Unique Nature of Pharynx
Transports fluid, solid, and air
Inferior border of pharynx
C6 - start of esophagus
4 Muscles of Pharynx Visible Posteriorly
Sup. constrictor m.
Middle constricor m.
Inf. constrictor
Stylopharyngeus
3 Constrictor M.s Relation
Overlap each other, w/ inferior overlapping middle and mid overlapping sup
Hyoid Bone (2)
Sticks out posterolaterally and acts as anchorage for middle constrictor
Stylopharyngeus m.
Comes down into pharynx b/w middle and sup constrictors
Overall Innervation of Pharynx (source and 3 types)
Pharyngeal plexus - skeletal motor, cutaneous sensory from mucosal lining, and postganglionic symps going to blood vessels
Motor Innervation of Pharynx (2)
Pharyngeal branches of vagus n. (X)
Except stylopharyngeus innervated by glossopharyngeal n. (IX)
Sensory Innervation of Pharynx (3)
Pharyngeal branches of Glossopharyngeal n. (IX)
Except auditory tube region innervated by trigeminal n. (V) and lower pharynx by vagus n. (X)
Gag Reflex Nerve
Glossopharyngeal n. (IX) senses and Vagus (X) does motor - IX-X reflex arc
Blood Supply of Pharynx (3)
Ascending pharyngeal a. off ext. carotid
Facial a.
Maxillary a.
3 Regions of Pharynx
Nasopharynx, oropharynx, and laryngopharynx
Choana
Opening at end of turbinates which marks beginning of nasopharynx from nasal cavity
Pharyngeal (adenoid) Tonsil
Tonsil at very posterior/superior corner of nasopharynx
Sleep Apnea
Caused by enlargement of pharyngeal tonsils
Torus Tubarius
Projection of auditory tube on nasopharynx wall
Ostium of Auditory Tube
Opening for auditory tube just deep torus tubarius
Salpingopharyngeal Fold
Comes down from back of torus tubarius and runs down pharynx, covering salpingopharyngeus m.