Floor of mouth tongue

Question 1

Anterior boundary of the oral cavity

Answer 1

arches of maxilla and mandible

Question 2

Posterior boundary of the oral cavity

Answer 2

oropharyngeal isthmus

Question 3

What is the oropharyngeal isthmus bounded by?

Answer 3

laterally by palatoglossal folds

Question 4

Roof of oral cavity

Answer 4

hard and soft palate

Question 5

floor of oral cavity

Answer 5

tongue, muscles of floor of mouth

Question 6

What does the chorda tympani branch of CNVII supply?

Answer 6

parasynpathetic secretomotore to submandibular and sublingual glands and special sense of taste to anterior 2/3 of tongue

Question 7

functions of tongue

Answer 7

formation of a food bolus, push bolus of food posteriorly, keeping mouth clean, speech and tasting and sensing food

Question 8

Where does the posterior 1/3 of the tongue lie

Answer 8

oropharynx

Question 9

What supplies the posterior 1/3 of tongue

Answer 9

CNIX

Question 10

What supplies the anterior 2/3 of tongue

Answer 10

general sensation - CNVc (lingual. nerve) taste sensation - CNVII (via lingual n. and chorda tympani)

Question 11

How does the hypoglossal nerve reach the tongue

Answer 11

Internal carotid artery. Internal jugular vein. Posterior belly of digastric. Submandibular region. Hypoglossus muscle. Deep to Mylohyid. Tongue

Question 12

What are the two groups of striated muscles of the tongue

Answer 12

intrinsic and extrinsic

Question 13

Where do intrinsic muscles originate and insert?

Answer 13

within the tongue

Question 14

Where do extrinsic muscles originate

Answer 14

outwith the tongue and insert into it

Question 15

Intrinsic muscles act to do what?

Answer 15

alter shape of tongue

Question 16

What do the longitudinal muscles of the tongue do?

Answer 16

make tongue short and thick

Question 17

What do the transverse and cervical muscles of the tongue do?

Answer 17

make tongue long and narrow

Question 18

What are all the tongue muscles supplied by?

Answer 18

CNXII except palatoglossus (CNX)

Question 19

Clinical testing of CNXII

Answer 19

ask pt to stick their tongue straight out

Question 20

If both CNXIIS are normal, what should the tongue do?

Answer 20

tongue tip should stick out and remain in the midline

Question 21

If one CNXII is damaged, what will the tongue tip do?

Answer 21

point towards the side of the injured nerve

Question 22

Functions of the oral cavity

Answer 22

preparation of food bolus for swallowing, defence against infection and speech