283

Front 1

GLOSSOPHARYNGEAL NERVE

-CAROTID SINUS BRANCH
-STYLOPHARYNGEUS
-PALATINE TONSIL

Back 1

D. The carotid sinus branch provides sensory innervation to the carotid sinus
as well as the carotid body

E. As the glossopharyngeal nerve descends lateral to the stylopharyngeus, it
supplies the stylopharyngeus with its only motor branch; it then accom-
panies the stylopharyngeus through the gap in the lateral pharyngeal wall
between the superior and middle pharyngeal constrictors

F. The glossopharyngeal nerve subsequently courses anteriorly, between the
palatine tonsil and hyoglossus, and provides sensory innervation, includ-
ing taste, to the posterior one-third of the tongue

Front 2

VAGUS NERVE

-EMERGES FROM?

Back 2

X. Vagus Nerve

A. Emerges from the jugular foramen posterior to the internal jugular vein
and descends within the carotid sheath, behind and between the internal
jugular vein and internal/common carotid artery; its branches are noted
below

Front 3

VAGUS NERVE

AURICULAR BRANCH

Back 3

X. Vagus Nerve

B. Auricular branch: enters the mastoid canaliculus on the lateral wall of the
jugular foramen; its branches provide genera] sensory innervation to the
auricle, external acoustic meatus, and tympanic membrane

Front 4

VAGUS NERVE

PHARYNGEAL BRANCH

Back 4

X. Vagus Nerve

C. Pharyngeal branch: contributes to the pharyngeal plexus and provides
motor innervation to the muscles of the pharynx and palate, except for the
stylopharyngeus and tensor veli palatini, which are innervated by the glos-
sopharyngeal nerve and the nerve to the tensor veli palatini, respectively

Front 5

VAGUS NERVE

SUPERIOR LARYNGEAL NERVE

Back 5

X. Vagus Nerve

D. Superior laryngeal nerve

1. Descends lateral to the pharynx and divides into the internal and external
laryngeal nerves, posterosuperior to the tip of the greater cornu of the hyoid

Front 6

VAGUS NERVE
SUPERIOR LARYNGEAL
INTERNAL LARYNGEAL

Back 6

D. Superior laryngeal nerve

2. Internal laryngeal nerve: penetrates the thyrohyoid membrane and pro-
vides general sensory innervation to the mucosa of the larynx superior
to the vocal folds as well as to the mucosa of the superior part of the
laryngopharynx; it also provides general sensory and taste innervation
to the very posterior part of the tongue and epiglottis

Front 7

VAGUS NERVE
SUPERIOR LARYNGEAL
EXTERNAL LARYNGEAL

Back 7

D. Superior laryngeal nerve

3. External laryngeal nerve: descends inferior to the oblique line of the
thyroid cartilage, deep to the sternothyroid and superficial to the infe-
rior pharyngeal constrictor; innervates the cricothyroid and part of the
inferior pharyngeal constrictor

Front 8

VAGUS NERVE

BRANCHES TO THE CAROTID BODY

Back 8

E. Branches to the carotid body: provide sensory innervation to the carotid
body