Oral Cavity

Question 1

what is the histological lining of the oral cavity, oropharynx and laryngoparyx

Answer 1

stratified squamous epithelium
usually not keratinised

Question 2

where in the oral cavity is keratinised and why?

Answer 2

in the masticatory mucosa - hard palate, gingiva, dorsal of tongue (mucosa lining not keratinised)
to deal with friction and pressure

Question 3

what gives general sensation to the superior half of the oral cavity?

Answer 3

CN V2

Question 4

what gives general sensation to the inferior half of the oral cavity?

Answer 4

CN V3

Question 5

where does jaw opening occur?

Answer 5

temperoomandibular joints
TMJs

Question 6

what muscle pairs are involved in jaw ‘closing’?

Answer 6

masseter
temporalis
medial pterygoid

Question 7

what muscle pair is involved in jaw ‘opening’?

Answer 7

lateral pterygoid

Question 8

what supplies the jaw opening and closing muscles?

Answer 8

CN V3

Question 9

where is the parotid gland?

Answer 9

near the second upper molar

Question 10

what nerve supplies the parotid gland?

Answer 10

CN IX

Question 11

where is the submandibular gland?

Answer 11

at the base of the frenulum

Question 12

what nerve supplies the submandibular gland?

Answer 12

CN VII

Question 13

where is the sublingual gland?

Answer 13

the floor of the mouthw

Question 14

what nerve supplies the sublingual gland?

Answer 14

CN VII

Question 15

what is the histology of the anterior 2/3 of the tongue?

Answer 15

stratified squamous epithelium
thin on ventral surface
thick with papillae on dorsal surface

Question 16

how does the anterior 2/3 of the tongue sit?

Answer 16

horizontally and in the oral cavity

Question 17

what nerve gives general sensation to the anterior 2/3 of the tongue?

Answer 17

CN V3

Question 18

what nerve gives special sensation to the anterior 2/3 of the tongue?

Answer 18

CN VII

Question 19

what is the histology of the posterior 1/3 of the tongue?

Answer 19

covered in smooth stratified epithelium
lacks papillae - except circumvulate papillae
substantial lymphoid aggregates in submucosa

Question 20

how does the posterior 1/3 of the tongue sit?

Answer 20

vertically
not in oral cavity

Question 21

what nerve gives general and special sensation to the posterior 1/3 of the tongue?

Answer 21

CN IX

Question 22

what do the extrinsic muscles of the tongue do?

Answer 22

change the position of the tongue during mastication, swallowing and speech

Question 23

what are the pairs of extrinsic tongue muscles?

Answer 23

palatoglossus
genioglossus
hypoglossus
styloglossus

Question 24

what do skeletal intrinsic muscles of the tongue do?

Answer 24

modify the shape of the tongue during fucntion

Question 25

what nerve supplies almost all the extrinsic and intrinsic muscles of the tongue?

Answer 25

CN XII
hypoglossal nerve

Question 26

what tongue muscles are not supplied by CN XII (hypoglossal)?

Answer 26

palatoglossus