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Front 1

VAGUS NERVE

SUPERIOR LARYNGEAL NERVE

-descends?
-divides?
-innervation type? where?

-ILN: innervation
-ELN: innervation

Back 1

3. The superior laryngeal nerve branches from the vagus nerve, descends
lateral to the pharynx, and divides into the internal and external laryn-
geal nerves; the internal laryngeal nerve penetrates the thyrohyoid mem-
brane and provides sensory innervation to the mucosa ofthe superior part
of the laryngopharynx, and the external laryngeal nerve descends infe-
rior to the oblique line ofthe thyroid cartilage, deep to the sternothyroid
and superficial to the inferior pharyngeal constrictor, and innervates part
of the inferior pharyngeal constrictor (as well as the cricothyroid)

Front 2

VAGUS NERVE

RECURRENT LARYNGEAL NERVE

Back 2

4. The recurrent laryngeal nerve ascends posterior to the thyroid gland
and, as it enters the larynx between the inferior pharyngeal constrictor
and esophagus, it provides sensory innervation to the mucosa of the
inferior part of the laryngopharynx

Front 3

MAXILLARY NERVE

-pharyngeal branch
-sensory innervation where?

Back 3

C. Maxillary nerve: its pharyngeal branch courses posteriorly from the
pterygopalatine fossa, through the palatovaginal canal, and provides sen-
sory innervation to the mucosa ofthe nasopharynx

Front 4

ASCENDING PHARYNGEAL ARTERY

Back 4

A. Ascending pharyngeal artery: slender branch arising from tlie medial side
ofthe external carotid artery; ascends between the lateral wall ofthe phar-
ynx and internal carotid artery

Front 5

ASCENDING PALATINE ARTERY

Back 5

B. Ascending palatine artery: branch ofthe facial artery; ascends on the lateral
aspect ofthe superior pharyngeal constrictor, deep to the medial pterygoid

Front 6

SUPERIOR THYROID ARTERY

Back 6

C. Superior thyroid artery: supplies the laryngopharynx as it descends between
the sternothyroid and inferior pharyngeal constrictor with the external
laryngeal nerve; gives rise to the superior laryngeal artery which supplies
the laryngopharynx after penetrating the thyrohyoid membrane with the
internal laryngeal nerve

Front 7

INFERIOR LARYNGEAL ARTERY

Back 7

D. Inferior laryngeal artery: branch ofthe inferior thyroid artery; supplies the
laryngopharynx as it ascends between the inferior pharyngeal constrictor
and esophagus with the recurrent laryngeal nerve

Front 8

PHARYNGEAL PLEXUS OF VEINS

Back 8

E. Pharyngeal plexus of veins: venous network within the buccopharyngeal
fascia; drains anteriorly on either side of the pharynx into the pterygoid
venous plexuses (some pharyngeal veins drain into the internal jugular vein)

Front 9

LYMPHATICS

Back 9

F. Lymphatics: drain to retropharyngeal nodes along the posterolateral wall
ofthe pharynx; retropharyngeal nodes drain to deep cervical nodes