0428 - Oral cavity and tongue - EG

Question 1

What is the vestibule?

Answer 1

The area in front of the teeth, inside the lips of the mouth.

Question 2

What is the oral cavity proper (boundaries)?

Answer 2

area bounded by the teeth, faucial arches, hard and soft palates, floor of the mouth (mylohyoid m).

Question 3

What is the posterior opening of the mouth?

Answer 3

The fauces.

Question 4

What is one of the first sensory events that initiates the reflex of swallowing?

Answer 4

The bolus of food coming into contact with the soft palate and uvula

Question 5

What muscle lies under the anterior faucial arch?

Answer 5

palatoglossus, runs from soft palate to tongue.

Question 6

What muscle lies under the posterior faucial arch?

Answer 6

palatopharyngeus, runs from soft palate to pharynx.

Question 7

Which nerve runs along the internal aspect of the mandible?

Answer 7

The inferior alveolar nerve, a branch of V3 (trigeminal mandibular nerve). passes through the lingular and mandibula foramen and runs along the mylohyoid line of the mandible and out of the mental foramen as the mental branch.

Question 8

Which nerve innervates the dentine of the teeth?

Answer 8

inferior alveolar n.

Question 9

How many teeth are in primary teeth? From what ages do the begin to appear and stop?

Answer 9

20 primary teeth. First to appear is bottom then upper tooth (month): central incisors (6-7) then lateral incisors (7-9), cuspids (16-18), primary 1st molars (12-14), last is primary 2nd molars (20-24).

Question 10

How many teeth are in secondary teeth? From what ages do the begin to appear and stop?

Answer 10

32 secondary teeth. First to appear is bottom then upper tooth (year): central incisors (6-7,7-8) then lateral incisors (7-8,8-9), cuspids (9-10,11-12), 1st premolars (10-12), 2nd premolar (10-12), 1st molar (6-7), 2nd molar (10-13), last is 3rd molars (17-21).

Question 11

List the suprahyoid muscles and the nerve that innervates each.

Answer 11

mylohyoid (V3), geniohyoid (C1 via XII), stylohyoid (VII), digastric (anterior belly V3, posterior belly VII).

Question 12

What nerve supplies the intrinsic muscles of the tongue?

Answer 12

CN XII

Question 13

List the extrinsic muscles of the tongue and the nerve that innervates each.

Answer 13

genioglossus (XII), styloglossus (XII), hyoglossus (XII), palatoglossus (CN XI via X).

Question 14

Which muscle supports the weight of the tongue and tenses the floor of the mouth and what nerve innervates it?

Answer 14

mylohyoid m, (V3).

Question 15

Which muscle draws the hyoid bone forward and what nerve innervates it?

Answer 15

geniohyoid (C1 via XII)

Question 16

Which muscles elevate the hyoid and what is their innervation?

Answer 16

stylohyoid (VII), digastric (anterior belly V3, posterior belly VII).

Question 17

Which muscle protrudes and depresses the tongue?

Answer 17

genioglossus (XII)

Question 18

Which muscles draws the tongue back and elevates the posterior end for swallowing?

Answer 18

styloglossus (XII), palatoglossus (CN XI via X)

Question 19

Which nerve supplies pain fibres to the sublingual and submandibular glands?

Answer 19

V3

Question 20

Which nerve supplies parasympathetic and secretomotor innervation to the sublingual and submandibular glands?

Answer 20

CN VII

Question 21

Which nerve supplies pain and parasympathetic innervation to the parotid gland?

Answer 21

CN IX

Question 22

Which nerve supplies touch sensation and which taste to the anterior 2/3 of the tongue?

Answer 22

V3 touch; CNVII taste

Question 23

Which nerves supplies touch and taste innervation to the posterior 1/3 of the tongue?

Answer 23

CN IX

Question 24

Which nerve supplies touch and taste innervation to the epiglottis?

Answer 24

CN X

Question 25

Which nerve supplies touch sensation and which taste to the soft palate?

Answer 25

touch V2, taste IX

Question 26

Which artery supplies the tongue and floor of the mouth?

Answer 26

lingual artery, branch of the external carotid a.

Question 27

Where is the sublingual gland located?

Answer 27

anteriolaterally in the inner surface of the mandible.

Question 28

Where is the submandibular gland located?

Answer 28

a c-shaped gland that encloses the posterior border of mylohyoid m. its duct passes to the sublingual papilla under the tongue.

Question 29

Where is the parotid gland located?

Answer 29

Superfical between the level of the zygomatic arch, posterior margin of the mandible and the temporal bone. its duct pierces the buccinators to open into the vestibule of the oral cavity next to the upper 2nd molar.