oral cavity

Question 1

glossopharyngeal n. runs lateral to ____ to enter the pharynx between ___ and ____

Answer 1

stylopharyngeus m; superior and middle constrictor mm.

Question 2

extrinsic mm. of the tongue

Answer 2

palatoglossus
styloglossus
genioglossus
hyoglossus

Question 3

intrinsic mm. of the tongue

Answer 3

superior longitudinal
vertical
transverse
inferior longitudinal

Question 4

____ innervates all intrinsic mm of the tongue and most extrinsic

Answer 4

CN XII

Question 5

_____ (one extrinsic tongue m.) is innervated by ____

Answer 5

palatoglossus; CN X

Question 6

arterial supply to the oral cavity

Answer 6

facial a.- supplies most superficial structures
maxillary a- supplies buccinator
lingual a- supplies most deeper structures

Question 7

3 branches to the tongue region

Answer 7

dorsal lingual a.
deep lingual a.
sublingual a.

Question 8

special sensory innervation to the tongue

Answer 8

1. anterior 2/3 by chorda tympani (CN VII) ; fibers travel with lingual n.
2. posterior 1/3 by CN IX
3. root of the tongue and epiglottis by X

Question 9

general sensory innervation to the tongue

Answer 9

1. anterior 2/3 by lingual n. of CN V3
2. posterior 1/3 by IX
3. root of tongue and epiglottis by X

Question 10

anterior 3/4 of hard palate is the ____ and the posterior 1/4 is the ____

Answer 10

palatine process of the maxilla; horizontal plate of the palatine bone

Question 11

palatine aponeurosis is composed of fibers from:

Answer 11

tensor veli palatini and palatoglossus

Question 12

tensor veli palatini m. is innervated by _____

Answer 12

medial pterygoid n. (from V3)

Question 13

levator veli palatini arises from ____ and ____; inserts into ____; located just ____ to tensor veli palatini m.

Answer 13

temporal bone; auditory tube; palatine aponeurosis; posteromedial

Question 14

action and innervation of levator veli palatini

Answer 14

elevates and retracts soft palate to prevent food from entering nasopharynx (only muscle to elevate soft palate above neutral position); innervated by vagus n.

Question 15

vascular supply to the palate

Answer 15

descending palatine (gives off greater and lesser palatine)
ascending palatine (branch of facial a.)
palatine (branch of ascending pharyngeal a.)

Question 16

venous drainage of the palate is by ____ and ____ plexuses

Answer 16

pterygoid ; pharyngeal

Question 17

motor innervation to soft palate

Answer 17

tensor veli palatini - V3
levator veli palatini, palatoglossus, palatopharyngeus, uvular muscle, salpingopharyngeus - innervated by CN X via pharyngeal plexus

Question 18

during tonsillectomy, bleeding from ____ vein is common

Answer 18

paratonsillar

Question 19

____ lies on lateral pharyngeal wall and would be vulnerable to injury (during tonsillectomy) because lateral wall is thin

Answer 19

CN IX

Question 20

lingual n. (branch of V3) is first seen in the ____ and enters the oral cavity underneath the ____

Answer 20

infratemporal fossa; superior constrictor m.

Question 21

lingual n. emerges between ____ and is ____ to inferior alveolar a. and n.

Answer 21

medial and lateral pterygoid mm.

anterior/medial

Question 22

submandibular ganglion is at level of ____; suspended from ____ by 2 or more short nerve branches

Answer 22

3rd mandibular molar; lingual n.

Question 23

submandibular ganglion relays parasympathetic fibers from ____ that travel to ____ and ____

Answer 23

chorda tympani (VII); submandibular; sublingual glands

Question 24

sympathetic fibers to submandibular/sublingual glands are from ____

Answer 24

external carotid plexus

Question 25

unilateral paralysis of CN XII results in deviation of tongue toward _____

Answer 25

paralyzed side