Tongue and Floor of the Mouth

Question 1

what is the roof of the oral cavity?

Answer 1

hard & soft palate

Question 2

what is the floor of the oral cavity?

Answer 2

mainly soft tissues including TONGUE

Question 3

what are the lateral walls of the oral cavity?

Answer 3

cheeks

Question 4

what do the dental arches separate?

Answer 4

They separate the oral cavity into:
- oral vestibule
- oral cavity proper

Question 5

what is the oral vestibule?

Answer 5

the slit like space between the teeth/gingivae and the lips/cheeks

Question 6

what is the oral cavity proper?

Answer 6

space between the upper & lower dental arches

Question 7

what is the philtrum?

Answer 7

the depression in the midline above the upper lip

Question 8

what is the main muscular component of the lips?

Answer 8

the orbicularis oris

Question 9

what anastomoses in the lips?

Answer 9

the superior & inferior labial arteries to form an arterial ring

Question 10

what supplies blood to the cheeks?

Answer 10

buccal branches of the maxillary artery

Question 11

what is the main muscular component of the cheeks?

Answer 11

buccinator muscle

Question 12

what is the name of the mucosal fold that connects the gingivae to the lips?

Answer 12

labial frenulum

Question 13

what muscle makes up the floor of the mouth?

Answer 13

mylohyoid muscle

Question 14

what are the attachments of the mylohyoid muscle?

Answer 14

mylohyoid line of the mandible to the hyoid bone

Question 15

what is the midline between the two mylohyoid muscles known as?

Answer 15

mylohyoid raphe

Question 16

what are the attachments of the geniohyoid?

Answer 16

• mental spine of mandible
• body of hyoid

Question 17

what divides the anterior & posterior parts of the tongue?

Answer 17

terminal sulcus

Question 18

what are the different types of papilla to cover the tongue surface?

Answer 18

• fungiform
• foliate
• circumvallate
• filiforme

Question 19

where does the submandibular gland open into the oral cavity?

Answer 19

Sublingual papillae (caruncles)
- on the floor of the mouth at either side of the frenulum of tongue

Question 20

what are the intrinsic muscles of the tongue?

Answer 20

• superior longitudinal
• inferior longitudinal
• vertical
• transverse

Question 21

what are the intrinsic muscles responsible for?

Answer 21

changing the size & shape of the tongue

Question 22

what are the extrinsic tongue muscles responsible for?

Answer 22

• protruding
• retracting
• elevating
• depressing

Question 23

what are the extrinsic muscles of the tongue?

Answer 23

• palatoglossus
• genioglossus
• hypoglosses
• styloglossus

Question 24

what tongue muscle protrudes the tongue?

Answer 24

genioglossus

Question 25

what is the function of the hyoglossus?

Answer 25

depressing sides of the tongue

Question 26

what nerves enter the tongue on the external surface of the hyoglossus?

Answer 26

- lingual nerve - hypoglossal nerve

Question 27

what is the function of the styloglossus?

Answer 27

elevating and retracting the tongue

Question 28

where does the palatoglossus muscle originate from?

Answer 28

palatine aponeurosis (fibrous tissue on posterior border of hard palate)

Question 29

what is the function of the palatoglossus muscle?

Answer 29

depresses soft palate towards the tongue & lifts posterior tongue

Question 30

what are the muscles of the tongue innervated by? what is the exception?

Answer 30

All innervated by HYPOGLOSSAL NERVE APART FROM the palatoglossus - vagus nerve

Question 31

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

Answer 31

lingual nerve (from CNV3)

Question 32

what supplies general sensation to the posterior 1/3 of the tongue ?

Answer 32

Glossopharyngeal nerve

Question 33

what supplies taste to the anterior 2/3 of the tongue?

Answer 33

facial nerve via chorda tympani

Question 34

what supplies taste to the posterior 1/3 of the tongue?

Answer 34

glossopharyngeal nerve

Question 35

what is the major arterial supply to the tongue?

Answer 35

lingual artery

Question 36

what veins drain the tongue? where do they drain to?

Answer 36

Deep lingual and dorsal lingual veins - drain into the IJV