Oral Cavity and FOM

Question 1

What are the boundaries of the oral cavity?

Answer 1

Roof - hard and soft palates
Floor - mainly soft tissues, including tongue
Lateral walls - cheeks

Question 2

Where do the 2 mylohyoid muscles attach in the midline?

Answer 2

Mylohyoid raphe

Question 3

What muscles sit superior to the mylohyoid muscles in floor of oral cavity?

Answer 3

Geniohyoid muscles
(origin - mental spine of mandible, insertion - body of hyoid)

Question 4

What does the posterior 1/3 of the tongue form?

Answer 4

Anterior wall of oropharynx

Question 5

What muscles form the floor of the oral cavity?

Answer 5

Mylohyoid muscles, geniohyoid muscles (and tongue).

Question 6

What are the 4 different types of tatsebuds?

Answer 6

Fungiform - mushroom
Foliate
Vallate
Filiform - only ones that do not have any tastebuds

Question 7

What are the extrinsic and intrinsic muscles separated by?

Answer 7

Sagittal septum

Question 8

What do the intrinsic muscles of the tongue do?

Answer 8

Change the shape and size of the tongue

Question 9

List the intrinsic muscles of the tongue

Answer 9

Superior longitudinal
Vertical
Transverse
Inferior longitudinal

Question 10

What do the extrinsic muscles of the tongue do?

Answer 10

Protrude, retract, elevate and depress the tongue.

Question 11

List the extrinsic muscles of the tongue

Answer 11

Palatoglossus
Styloglossus
Hyoglossus
Genioglossus

Question 12

What is the function of the palatoglossus?

Answer 12

Muscle of the tongue and the soft palate
Depresses the soft palate towards the tongue and lifts the posterior tongue as well

Question 13

What is the function of the Styloglossus?

Answer 13

Elevates and retracts the tongue

Question 14

What is the function of the hyoglossus?

Answer 14

Depresses the side of the tongue

Question 15

What is the function of the genioglossus?

Answer 15

Protrudes the tongue

Question 16

What is the blood supply to the tongue?

Answer 16

The lingual artery

Question 17

What is the venous drainage of the tongue?

Answer 17

Deep lingual and dorsal lingual veins drain the tongue (both drain into the IJV)

Question 18

Motor innervation of the tongue

Answer 18

Hypoglossal nerve
Except palatoglossus which is supplied by the vagus

Question 19

General sensory innervation of the tongue

Answer 19

Anterior 2/3 - lingual nerve
Posterior 1/3 - glossopharyngeal

Question 20

Special sensory innervation to the tongue

Answer 20

Anterior 2/3 - facial nerve via chroda tympani
Posterior 1/3 - glossopharyngeal