Submandibular region

Question 1

oral cavity proper

Answer 1

area between teeth (palate to tongue, continuous with oropharynx)

Question 2

vestibule

Answer 2

area between cheek and teeth

Question 3

lips inn.

Answer 3

upper lip: V2 (infraorbital n.)

lower lip: V3 (mental and buccal nn.)

Question 4

lips lymphatic drainage

Answer 4

upper lip: ipsilaterally to submandibular nodes
central lower lip: ipsilaterally to submental nodes
lateral lower lip: bilaterally to submandibular nodes

Question 5

inn. to upper teeth

Answer 5

superior alveolar divisions (V2)

Question 6

inn. to lower teeth

Answer 6

inferior alveolar divisions (V3)

Question 7

tongue components

Answer 7

1. body (anterior 2/3), mobile
2. root (posterior 1/3), fixed
3. epiglottic region

Question 8

body and root of tongue separated by

Answer 8

terminal sulcus

Question 9

filiform papillae

Answer 9

small conical projections, no taste buds

Question 10

fungiform papillae

Answer 10

medium, dome-shaped

Question 11

circumvallate papillae

Answer 11

large, round, bulk of taste receptors

Question 12

intrinsic muscles of tongue

Answer 12

1. superior longitudinal m.
2. vertical and transverse mm.
3. inferior longitudinal m.
   Inn. CN XII (GSE), change shape of tongue

Question 13

extrinsic muscle of tongue

Answer 13

1. genioglossus
2. hyoglossus
3. styloglossus
4. palatoglossus

Move tongue

Question 14

genioglossus

Answer 14

protrudes tongue, pushes tongue to opposite side acting unilaterally. CN XII (GSE)

Question 15

hyoglossus

Answer 15

retracts, depresses tongue. CN XII (GSE)

Question 16

styloglossus

Answer 16

retracts, elevates tongue. CN XII (GSE)

Question 17

palatoglossus

Answer 17

pulls tongue and soft palate together. CN X (SVE)

Question 18

CN XII lesion

Answer 18

tongue protrudes to side of lesion

Question 19

general sensation to anterior tongue

Answer 19

lingual n. (V3)

Question 20

taste to anterior tongue

Answer 20

facial n. (chorda tympani)

Question 21

general sensation and taste to posterior tonge

Answer 21

CN IX

Question 22

general sensation and taste to epiglottic region

Answer 22

CN X

Question 23

blood supply to tongue and oral cavity

Answer 23

lingual a. (br. from external carotid)

Question 24

tongue lymph drainage

Answer 24

posterior tongue: superior deep cervical nodes
apex of tongue: bilateral to submental nodes
middle lateral tongue: ipsilateral to submandibular nodes
central middle tongue: contralateral to inferior deep cervical nodes (jugulo-omohyoid node)

Question 25

Waldeyer's Ring

Answer 25

pharyngeal, tubal, palatine, and lingual tonsils

Question 26

parasympathetic inn. to parotid gland

Answer 26

1. pregang. cell bodies: salivatory nucleus in brainstem 2. pregang. fibers: CN IX (tympanic and lesser petrosal branches) 3. postgang. cell bodies: otic ganglion 4. postgang. fibers: V3 (auriculotemporal n.)

Question 27

parasympathetic inn. to submandibular and sublingual glands

Answer 27

1. pregang. cell bodies: salivatory nucles in brainstem 2. pregang. fibers: CN VII (chorda tympani) 3. postgang. cell bodies: submandibular ganglion 4. postgang. fibers: V3 (lingual n.)

Question 28

sympathetic inn. to salivary glands

Answer 28

1. pregang. cell bodies: T1-T4 lateral horn 2. pregang. fibers: sympathetic chain 3. postgang. cell bodies: superior cervical ganglion 4. postgang. fibers: external carotid n.

Question 29

submandibular triangle boundaries

Answer 29

mandible and two bellies of digastric

Question 30

contents of submandibular triangle

Answer 30

1. superficial submandibular gland 2. CN XII 3. facial a.

Question 31

digastric

Answer 31

depresses mandible, elevates hyoid anterior belly: V3 (arch 1) posterior belly: VII (arch 2)

Question 32

stylohyoid

Answer 32

elevates and retracts hyoid. CN VII

Question 33

mylohyoid

Answer 33

forms floor of oral cavity, elevates hyoid and floor of mouth. V3 (mylohyoid br.)

Question 34

geniohyoid

Answer 34

elevates hyoid, opens mouth with hyoid fixed. *C1 via CN XII*

Question 35

paralingual space

Answer 35

between mylohyoid and hyoglossus 1. CN XII 2. venous plexus 3. lingual n. 4. submandibular gland and duct

Question 36

major nerves of oral cavity

Answer 36

1. lingual n. (V3) 2. CN IX 3. CN X 3. CN XII

Question 37

lingual n. functions

Answer 37

1. GSA to body of tongue 2. distributes SVA to body of tongue (via chorda tympani) 3. distributes GVE-P to submandibular and sublingual glands

Question 38

hypoglossal n. functions

Answer 38

GSE to all intrinsic tongue mm. | GSE to all extrinsic tongue mm. except palatoglossus (X)

Question 39

glossopharyngeal n. functions

Answer 39

1. GSE to sylopharyngeus | 2. GVA and SVA to root of tongue

Question 40

vagus n. functions

Answer 40

1. GVA and SVA to epiglottic region of tongue | 2. SVE to palatoglossus