ORAL CAVITY

Question 1

What are the 4 intrinsic muscles of the tongue/

Answer 1

superior longitudinal
vertical
transverse
inferior longitudinal

Question 2

what are the 4 extrinsic muscles of the tongue?

Answer 2

palatoglossus
styloglossus
hypoglossus
genioglossus

Question 3

what innervates special sensation of taste in the tongue?

Answer 3

chorda tympani (branch of facial nerve)

Question 4

what innervates the muscles of the tongue? whats the exception?

Answer 4

hypoglossal nerve

palatoglossus muscle is innervated by the vagus nerve

Question 5

what innervates general sensation to the anterior 2/3rds and posterior 1/3rd of the tongue?

Answer 5

anterior - lingua

posterior - glossopharyngeal

Question 6

what is the lingual Nerve a branch of?

Answer 6

mandibular division of trigeminal nerve

Question 7

what are the 3 branches of the trigeminal nerve?

Answer 7

opthalmic
maxillary
mandibular

Question 8

whats the blood supply to the tongue?

Answer 8

lingual artery (branch of external carotid)

Question 9

what are the 3 branches of the lingual artery?

Answer 9

sublingual branch
deep lingual branch
dorsal lingual branch

Question 10

what does the lingual artery supply?

Answer 10

tongue
oral mucosa of floor of mouth
sublingual gland
muscles attached to hyoid (via supra hyoid muscle)

Question 11

outline the embryology of the tongue?

Answer 11

starts at week 4
tubercula impar arises from 1st pharyngeal arch
lateral lingual swellings grow and cover the median tongue bud and fuse to form the anterior 2/3rds of the tongue
the copula forms from the 3rd and 4th pharyngeal arches and grows over the 2nd pharyngeal arch
anterior 2/3rds and posterior 1/3rd of the tongue fuse at the sulcus terminalis

Question 12

what innervates the hard palate?

Answer 12

greater palatine and nasopalatine nerves (both branches of maxillary branch of trigeminal)

Question 13

what innervates the soft palate?

Answer 13

lesser palatine nerve (branch of maxillary branch of trigeminal nerve)

Question 14

what innervates the cheeks?

Answer 14

buccal nerve (mandibular devision of trigeminal nerve)

Question 15

what are the 3 salivary glands?

Answer 15

parotid
submandibular
sublingual

Question 16

what does the parotid gland produce?

Answer 16

serous fluid - amylase comes from here

Question 17

what does the submandibular gland produce?

Answer 17

serous and mucus saliva - mixed

Question 18

what does the sublingual gland produce?

Answer 18

mucous saliva

Question 19

where does the parotid gland enter the oral cavity?

Answer 19

down the parotid duct and onto the buccal walls at the level of the 2nd maxillary molar

Question 20

where does the sublingual gland enter the oral cavity?

Answer 20

down major and minor sublingual ducts and onto the sublingual folds

Question 21

where does the submandibular gland enter the oral cavity?

Answer 21

down the submandibular duct and opens at the sublingual papilla under the tongue

Question 22

what innervates the sublingual and submandibular glands?

Answer 22

chord tympani

Question 23

What teeth do we have in each quadrant?

Answer 23

2 incisors
1 canine
2 premolar
3 molar

Question 24

what innervates the maxillary teeth?

Answer 24

superior alveolar nerve

Question 25

what innervates the mandibular teeth?

Answer 25

inferior alveolar nerve

Question 26

where does the superior alveolar nerve originate?

Answer 26

maxillary branch of the trigeminal nerve

Question 27

where does the inferior alveolar nerve originate?

Answer 27

mandibular division of the trigeminal nerve

Question 28

whats the blood supply to the mandibular and maxillary teeth?

Answer 28

maxillary artery (superior and inferior alveolar nerve branches)

Question 29

what are the branches of the external carotid artery?

Answer 29

Superior thyroid
Ascending pharyngeal
Lingual
Facial
Occipital
Posterior auricular
Maxillary
Superficial temporal