GI Anatomy

Question 1

jaw closing muscles

Answer 1

masseter, temporalis, medial pterygoid

Question 2

jaw opening muscles

Answer 2

lateral pterygoid

Question 3

what cranial nerves supply the jaw muscles

Answer 3

mandibular division of the trigeminal nerve CN V3

Question 4

course of CN V3

Answer 4

from pons, through foramen ovale, to muscles of mastication and sensory area

Question 5

3 divisions of the trigeminal ganglion

Answer 5

ophthalmic, maxillary and mandibular

Question 6

orale vestibule

Answer 6

slit like space teeth + gingivae and lips + teeth

Question 7

orale cavity proper

Answer 7

roof is formed by palate which separates it from nasal cavity

Question 8

how many teeth in mouth

Answer 8

32

Question 9

3 pairs of salivary glands

Answer 9

parotid, submandibular, sublingual

Question 10

CN giving sensation to superior half of oral cavity

Answer 10

CN V2

Question 11

CN giving sensation to inferior half of oral cavity

Answer 11

CN V3

Question 12

CN nerves causing gag reflex

Answer 12

(sensory part) CN IX
(motor part) CN IX and CN X

Question 13

course of CN V2

Answer 13

from pons, through foramen rontundum, enters pterygopalatine fossa, branches to pterygopalatine ganglion, continues anteriorly entering the orbit through the inferior orbital fissure

Question 14

what does CN V2 supply

Answer 14

skin of face, upper lip, inferior lid and conjunctiva, maxillary teeth

Question 15

course of CN IX

Answer 15

medulla, through jugular foramen, to posterior wall of oropharynx, parotid gland and post 1/3 of tongue

Question 16

sensation of anterior 2/3rds of tongue, in oral cavity

Answer 16

general sensory = CN V3, special sensory = CN VII

Question 17

sensation to posterior 1/3rd of tongue, in oropharynx

Answer 17

general and special sensory supply = CN IX

Question 18

what does CN VII supply

Answer 18

supplies all muscles of facial expression

Question 19

course of CN VII

Answer 19

pontomedullary junction, enters internal acoustic meatus, passes through stylomastoid foramen, passes through parotid gland to supply muscles of face

Question 20

chorda tympani branch of CN VII connects to what

Answer 20

lingual nerve branch of CN V3

Question 21

4 pairs of muscles of the tongue

Answer 21

palatoglossus
styloglossus
hyoglossus
genioglossus

Question 22

what CN supplies the muscles of the tongue

Answer 22

all except palatoglossus supplied by CN XII

Question 23

course of CN XII

Answer 23

from medulla, through hypoglossal canal, to extrinsic and intrinsic muscle of tongue

Question 24

what CN supplies the circular constrictor muscles

Answer 24

CN X

Question 25

role of longitudinal muscles of the oesophagus

Answer 25

elevate pharynx and larynx, attach to larynx, contract to shorten pharynx, raise larynx to close over the larynx inlet

Question 26

CN supplying the longitudinal muscles of the oesophagus

Answer 26

supplied by CN X and IX