Week 7 (2)

Question 1

where does the mandibular nerve exit the cranial cavity

Answer 1

foramen ovale

Question 2

which bone is the foramen ovale in

Answer 2

sphenoid bone

Question 3

what branch comes off of the main trunk of the mandibular nerve after going through the foramen ovale

Answer 3

nerve to medial pterygoid

Question 4

what happens after the nerve to medial pterygoid branches off

Answer 4

the mandibular nerve splits into anterior and posterior division

Question 5

what nerves (in correct order) come off of the anterior division of the mandibular nerve

Answer 5

1. nerve to masseter
2. deep temporal nerves
3. nerve to lateral pterygoid muscle

Question 6

after giving off the nerve to lateral pterygoid, what is the anterior division of the mandibular nerve called (continuation of the anterior division)

Answer 6

buccal nerve

Question 7

what is the course of the nerve to masseter

Answer 7

comes off of anterior division soon after branching, runs laterally, through the mandibular notch and enters deep aspect of the masseter

Question 8

what is the course of the deep temporal nerves

Answer 8

branches to temporalis muscle, approach muscle from its medial side, go into deep aspect of the muscle

Question 9

what is the last branch of the anteiror division of the mandibular nerve before it is called the buccal nerve

Answer 9

nerve to lateral pterygoid

Question 10

Desribe the buccal nerve

Answer 10

the continuation of the anterior division once its motor supply has come off. Often called the long buccal nerve just because it is long, gives off cutaneous and mucosal branches

Question 11

what are the branches of the posterior division of the mandibular nerve

Answer 11

• auriculotemporal
• inferior alveolar
• lingual

Question 12

what does the lingual nerve supply

Answer 12

Purely sensory to its own side:

• anterior 2/3 of tongue
• floor of mouth
• lingual gingiva in lower jaw

Question 13

what does the lingual nerve run close to

Answer 13

3rd molar, close relationship to the bone

Question 14

what nerve joins the lingual nerve

Answer 14

chorda tympani

Question 15

what is the chorda tympani a branch of

Answer 15

the facial nerve

Question 16

where does the chorda tympani join the lingual nerve

Answer 16

high up in the infratemporal fossa

Question 17

what is the role of the chorda tympani

Answer 17

fibres containing info about taste from the anterior 2/3 of the tongue are initially in the lingual nerve but then run through the chorda tympani to the facial nerve in the brainstem

Question 18

where does the chorda tympani join the facial nerve

Answer 18

inside of the upper part of the ear drum at the middle ear

Question 19

in addition to conveying taste sensation, what does the chorda tympani also do

Answer 19

also carries pre-ganglionic sympathetic fibres that make the sublingual and submandibular glands secrete

Question 20

what branches off from the inferior alveolar nerve before it enters the bone

Answer 20

nerve to mylohoid and anterior belly of digastric

Question 21

what is the only motor branch in the posterior division

Answer 21

nerve to mylohoid and anterior belly of digastric

Question 22

what hole does the inferior alveolar nerve go through to get into the mandible

Answer 22

mandibular foramen

Question 23

when does the inferior alveolar nerve give off the mental nerve

Answer 23

at premolar level

Question 24

what does the mental nerve supply

Answer 24

• skin of chin

- skin and mucosa of lip

Question 25

what is the continuation of the inferior alveolar nerve called after giving off the mental nerve

Answer 25

incisive branch

Question 26

what goes through the foramen spinosum

Answer 26

middle meningeal artery

Question 27

what is the middle meningeal artery a branch of

Answer 27

maxillary artery

Question 28

what nerve forms a loop around the middle meningeal artery

Answer 28

auriculotemporal

Question 29

what does the auriculotemporal artery supply

Answer 29

• sensation to the TMJ

- skin anterior to the ear