oral cavity 3- Tongue muscles and motor nerve supply

Question 1

4 instrinsic muscles of the tounge (inside the toungue) - they alter the shape of the tounge

Answer 1

Superior longitudinal muscles
Inferior longitudinal muscles
Vertical muscles
Transverse muscles

Question 2

what is the nerve supply for the instrinsic muscles of the tounge

Answer 2

hypoglossal nerve

Question 3

origin & insertion of superior longitudinal muscles

Answer 3

runs backwards from tip just below dorsal surface

Question 4

origin & insertion of inferior longitudinal muscles

Answer 4

runs backwards from tip closer to lower surface of the tongue

Question 5

origin & insertion of vertical muscles

Answer 5

runs from dorsal surface to ventral surface

Question 6

origin & insertion of transverse muscles

Answer 6

from the median septum, inserts into the (sides) of the tongue.

Question 7

Action of superior longitudinal

Answer 7

turns the tip up

Question 8

Action of inferior longitudinal

Answer 8

turns the tip down

Question 9

Contraction of both superior & inferior longitudinal

Answer 9

shortens the tounge

Question 10

Action of vertical muscle

Answer 10

flattens and brodens the toungue

Question 11

Action of transverse muscle

Answer 11

narrows and lengthens the tounge

Question 12

the four Extrinsic muscles of the tounge are - (they change the position of the tongue and take place outside the tounge)

Answer 12

Genioglossus
Hyoglossus
Palatoglossus
Styloglossus

Question 13

Genioglosssus origin

Answer 13

genial tubercle of mandible

Question 14

Genioglossus Insertion

Answer 14

whole undersurface tongue

Question 15

Genioglossus Action

Answer 15

pulls tongue forwards

Question 16

Genioglossus nerve supply

Answer 16

hypoglossal nerve

Question 17

Hyoglossus Origin

Answer 17

body of hyoid bone and greater cornu (wing) of hyoid bone

Question 18

Hyoglossus insertion

Answer 18

side of tongue

Question 19

Hyoglossus Action

Answer 19

depresses tongue

Question 20

Hyoglossus nerve supply

Answer 20

Hypoglossal Nerve

Question 21

Palatoglossus origin

Answer 21

aponeurosis of soft palate

Question 22

Palatoglossus insertion

Answer 22

sides of tongue

Question 23

Palatoglossus action

Answer 23

elevates tongue

Question 24

Palatoglossus nerve supply

Answer 24

Accessory nerve

Question 25

Styloglossus origin

Answer 25

tip of styloid process

Question 26

Styloglossus insertion

Answer 26

side of tongue

Question 27

Styloglossus action

Answer 27

draws tongue up and back

Question 28

Styloglossus nerve supply

Answer 28

Hypoglossal nerve

Question 29

Functions of the tongue

Answer 29

Mastication
Speech
Taste
Expression

Question 30

what is the name of the muscle that forms the floor of the mouth?

Answer 30

mylohyoid muscle

Question 31

what is the nerve supply to the mylohyoid muscle?

Answer 31

the inferior alveolar nerve