Mouth and tongue

Question 1

What innervates the intrinsic muscles of the tongue?

Answer 1

Hypoglossal nerve

Question 2

Name the two folds of the oral cavity

Answer 2

Anterior= palatoglossal arch (contains palatoglossal muscle)
Posterior= palatopharyngeal arch (contains palatopharyngeus muscle)

Question 3

What is the opening between oral cavity and oropharynx called?

Answer 3

Isthmus of the fauces

Question 4

What divides the tongue into anterior 2/3 and posterior 1/3?

Answer 4

By the V shaped sulcus terminalis where the circumvallate papillae are found

Question 5

Where is the root of the tongue?

Answer 5

Attached to hyoid bone

Question 6

Name the 3 types of papillae

Answer 6

Filiform (friction, has keratinised tip)
Fungiform (taste buds)
Circumvallate (larger, contain taste buds)

Question 7

Describe the sensory innervation of the tongue

Answer 7

Anterior 2/3 has chorda tympani for taste and lingual for general sensory
Posterior 1/3 has glossopharyngeal for both taste and general sensory
Root is innervated by vagus nerve

Question 8

Describe the motor innervation of the tongue

Answer 8

Hypogloassal nerve innervates intrinsic muscles of tongue

Extrinsic muscles are innervated by vagus& hypoglossal

Question 9

What innervates the palatoglossal muscle?

Answer 9

Vagus nerve

Question 10

What innervates the genioglossal muscle?

Answer 10

Hypoglossal nerve

Question 11

What innervates the hyoglossal muscle?

Answer 11

Hypoglossal nerve

Question 12

What innervates the styloglossal muscle?

Answer 12

Hypoglossal nerve

Question 13

What innervates the mylohyoid muscle?

Answer 13

Branch of the mandibular nerve

Question 14

What innervates the anterior belly of the digastric?

Answer 14

Branch of the mandibular nerve

Question 15

What is the posterior belly of the digastric innervated by?

Answer 15

Facial nerve

Question 16

What innervates the stylohyoid muscle?

Answer 16

Facial nerve

Question 17

What innervates the stylopharyngeus muscle?

Answer 17

Glossopharyngeal nerve

Question 18

Cancer of the tongue may involved which nodes?

Answer 18

Submandibular and possibly submental nodes, possibly upper or lower deep cervical nodes

Question 19

Describe the passage of lymph from central part of anterior tongue

Answer 19

Central vessels drain bilaterally to submandibular nodes or upper deep cervical nodes

Question 20

Describe the passage of lymph from marginal part of anterior tongue

Answer 20

Marginal vessels drain unilaterally to submandibular lymph nodes or directly to upper deep cervical lymph nodes on each side

Question 21

Name the 4 extrinsic muscles of the tongue

Answer 21

Genioglossus, hyoglossus, styloglossus, palatoglossus

Question 22

Attachment and action and innervation of genioglossus

Answer 22

Mandible, hypoglossal, protrusion

Question 23

Attachment and action and innervation of hyoglossus

Answer 23

Hyoid bone, hypoglossal, depression

Question 24

Attachment and action and innervation of styloglossus

Answer 24

Styloid process, hypoglossal, elevation&retraction

Question 25

Attachment and action and innervation of palatoglossus

Answer 25

Palatine aponeurosis, vagus, depression of soft palate and elevation of posterior tongue

Question 26

What is the blood supply and drainage of the tongue?

Answer 26

Lingual artery (also supplies floor of mouth and palatine tonsil), drainage into facial vein or directly into internal jugular vein

Question 27

The mylohyoid and the hyoglossus form a trough that contains what?

Answer 27

Deep part of submandibular gland, hypoglossal and lingual nerves

Question 28

What are teeth 1&2 called?

Answer 28

Incisors

Question 29

What are teeth 3 called?

Answer 29

Canines

Question 30

What are teeth 4&5 called?

Answer 30

Premolars

Question 31

What are teeth 6&8 called?

Answer 31

Molars

Question 32

Which are the wisdom teeth?

Answer 32

The last molars, may not erupt