Floor of Mouth and Tongue

Question 1

What are the boundaries of the oral cavity?

Answer 1

Anterior = dental arches 
Posterior = oropharyngeal isthmus 
Roof = hard and soft palate 
Floor = tongue, muscles of FOM
Lateral = cheeks

Question 2

What areas of the mouth are non-keratinised stratified squamous?

Answer 2

RED areas of the mouth

Question 3

Why are non-keratinised areas red?

Answer 3

keratinisation of the gingivae and hard palate reduces transparency of mucosa so less redness from oxygenated blood shines through

Question 4

What is the name of the junction between the gingiva and the labial alveolar mucosa

Answer 4

mucogingival junction

Question 5

What kind of gingiva is immediately adjacent to the crown of the tooth

Answer 5

free gingiva

Question 6

Name the folds on the anterior surface of the tongue

Answer 6

fimbriated folds

Question 7

Name the sulcus on the lingual side of the lower teeth

Answer 7

lingual sulcus

Question 8

Name the openings for ducts of the submandibular gland

Answer 8

sublingual papillae

Question 9

Name the openings for ducts of the sublingual glands

Answer 9

sublingual folds

Question 10

Give the bilateral muscles that meet in the midline of the inferior floor of mouth

Answer 10

mylohyoid muscles

Question 11

Name the structure in the midline of the bilateral mylohyoid muscles

Answer 11

midline raphe

Question 12

Name the bilateral muscles superficial to the mylohyoid muscles, that insert into the digastric fossae of the mandible

Answer 12

anterior belly of digastric

Question 13

Name the bilateral muscles deep to the mylohyoid muscles, that insert into the inferior mental spines of the mandible

Answer 13

geniohyoid muscles

Question 14

What duct travels over the lingual nerve?

Answer 14

the submandibular duct

Question 15

What nerve gives parasympathetic secretomotor innervation to the submandibular and sublingual glands?

Answer 15

Facial nerve via submandibular ganglion and chorda tympani

Question 16

What nerve gives parasympathetic secretomotor innervation to the parotid gland?

Answer 16

Glossopharyngeal nerve via otic ganglion

Question 17

Give the 5 main functions of the tongue

Answer 17

• Formation of food bolus
• Pushing food bolus to back of mouth to be swallowed
• Keep mouth clean
• Speech
• Tasting and sensing food

Question 18

Give a description of the posterior 1/3 of the tongue

Answer 18

• vertical part
• lies in oropharynx
• general sensation and taste supplied by glossopharyngeal

Question 19

Give a description of the anterior 2/3 of the tongue

Answer 19

• horizontal part
• visible in oral cavity
• general sensation supplied by lingual nerve of V3
• special sensation (taste) supplied by CNVII via lingual nerve and chorda tympani

Question 20

List the papillae of the tongue from anterior to posterior

Answer 20

fungiform
filiform
foliate
vallate

Question 21

Give the innervation of the 4 groups of papillae

Answer 21

fungiform = CNVII
filiform = CNV3
foliate = CNVII
vallate = CNIX

Question 22

What group of papillae do not contain taste buds?

Answer 22

filiform

Question 23

Give the name for the border between anterior 2/3 and the posterior 1/3 of the tongue

Answer 23

terminal sulcus

Question 24

Give the name of the structure at the tip of the terminal sulcus of the tongue

Answer 24

foramen caecum

Question 25

4 extrinsic muscles of the tongue and motor innervation

Answer 25

styloglossus GP
hyoglossus GP
genioglossus GP
palatoglossus vagus

Question 26

septum in midline of genioglossus?

Answer 26

lingual septum

Question 27

pt asked to stick out tongue and and goes to one side?

Answer 27

damage to the hypoglossal nerve on the side the tongue is pointing to