Mouth, Tongue, and Submandibular Region

Question 1

oral cavity proper

Answer 1

space medial to teeth (bounded by teeth), contains tongue

Question 2

vestibule

Answer 2

space between lips and cheeks and teeth

Question 3

sulcus terminalis

Answer 3

V-shaped groove divides tongue into the body and base

Question 4

body

Answer 4

the anterior 2/3s, in the oral cavity

Question 5

base

Answer 5

the posterior 1/3, in the pharynx; its surface is covered by lingual tonsil

Question 6

papillae

Answer 6

vallate, foliate, fungiform, filiform papillae (nodules), some have taste buds

Question 7

functions of the tongue

Answer 7

speech, manipulation and positioning of food, taste, swallowing, cleansing of the oral cavity

Question 8

extrinsic muscles of the tongue

Answer 8

genioglossus
hypoglossus
styloglossus
palatoglossus

Question 9

genioglossus

Answer 9

largest, fan shaped muscle; protrudes and depresses the tongue

Question 10

hyoglossus

Answer 10

depresses and retracts the tongue

Question 11

styloglossus

Answer 11

retracts and elevates the tongue

Question 12

palatoglossus

Answer 12

elevates the base of the tongue

Question 13

intrinsic muscles of the tongue originate and insert

Answer 13

within the tongue

Question 14

intrinsic muscles of the tongue function

Answer 14

they change the shape of the tongue and play a key role in speech

Question 15

nerve supply of both extrinsic and intrinsic muscles of the tongue

Answer 15

hypoglossal nerve (CN XII), except Palatoglossus muscle (CN X)

Question 16

sensory innervation of the tongue

Answer 16

anterior 2/3s of the tongue and posterior 1/3 of the tongue

Question 17

anterior 2/3s of the tongue sensory innervation

Answer 17

general sensation supplied by lingual nerve from V3
special sensation by facial nerve (CN VII) via Chorda tympani

Question 18

posterior 1/3 of the tongue sensory innervation

Answer 18

general sensation + special sensation (taste): Glossopharyngeal nerve (CN IX)

Question 19

motor innervation of the tongue

Answer 19

Hypoglossal nerve (CN XII) except Palatoglossus muscle (Vagus, CN X)

Question 20

parasympathetic innervation of the tongue (to mucosa of the tongue)

Answer 20

Chorda tympani from Facial nerve - via Lingual nerve to the tongue

Question 21

motor innervation

Answer 21

all tongue muscles: Hypoglossal nerve (CN XII), except Palatoglossus (CN X)

Question 22

posterior 1/3 tongue innervation

Answer 22

general sensory and special sensory: Glossopharyngeal nerve (CN IX)

Question 23

anterior 2/3s tongue innervation

Answer 23

general sensory: lingual nerve, branch of V3 of CN V
special sensory (taste): Chorda tympani (branch of CN VII)

Question 24

lingual artery

Answer 24

provides blood supply to the tongue
a branch of the external carotid artery
lies on the medial aspect of the hypoglossus muscle

Question 25

submandibular region

Answer 25

region between the mandible and the hyoid bone

Question 26

submandibular gland

Answer 26

salivary gland wraps around the posterior free border of the mylohyoid muscle

Question 27

two parts of the submandibular gland

Answer 27

superficial portion: found in submandibular triangle of the neck deep portion: in the floor of the mouth

Question 28

submandibular duct is the

Answer 28

Wharton's duct

Question 29

submandibular duct carries saliva from

Answer 29

the submandibular gland to the mouth approx. 5 cm long

Question 30

the submandibular duct arises from and travels

Answer 30

the deep portion of the submandibular gland, and travels anteriorly in the floor of the mouth

Question 31

submandibular duct terminates at

Answer 31

the sublingual papilla (caruncle) on both sides of the lingual frenulum

Question 32

the submandibular duct travels on the lateral aspect of the ________ muscle and is crossed by the ______ _____

Answer 32

hypoglossus muscle is crossed by the lingual nerve

Question 33

sublingual gland is located

Answer 33

under the tongue, beneath the mucous membrane of the floor of the mouth; forms the sublingual fold (elevated crest of mucous membrane)

Question 34

sublingual gland ducts

Answer 34

approx. 12 tiny ducts from the gland empty directly upward through the sublingual fold some ducts of the sublingual gland open into the submandibular duct

Question 35

what creates the division between the submandibular and sublingual spaces

Answer 35

mylohyoid muscle

Question 36

submandibular space

Answer 36

between mylohyoid muscle and the deep cervical fascia contains fat, submandibular gland (superficial part), lymph nodes, digastric muscles

Question 37

sublingual space

Answer 37

between mylohyoid muscle and genioglossus muscle contains geniohyoid muscle, sublingual gland, submandibular gland (deep portion), submandibular duct, lingual nerve, hypoglossal nerve (CN XII), lingual artery