Vestibulocochlear Nerve

Question 1

What is the 1st function of the vestibular system?

Answer 1

Help maintain a stable visual image while the head is moving.

Question 2

Most functions of the vestibular system are performed….at a…

Answer 2

Automatically (reflexively)

Subconscious (subcortical) level

Question 3

Functions of the vestibular system require (1)

Answer 3

Sensation and perception of head position

Question 4

Functions of the vestibular system require (2)

Answer 4

Compensatory eye movement during head movement

Question 5

Functions of the vestibular system require (3)

Answer 5

Compensatory postural adjustment during voluntary movement

Question 6

What is the 2nd function of the vestibular system?

Answer 6

Help maintain postural stability, especially during movement of the head (opposes gravity)

Question 7

What is the 3rd function of the vestibular system?

Answer 7

Provide information used for body awareness and spatial orientation

Question 8

The vestibular system is what kind of system?

Answer 8

Sensory and motor

Question 9

What are the 2 receptors of the vestibular system?

Answer 9

Maculae and cristae

Question 10

What do the 2 receptors of the vestibular system detect?

Answer 10

Maculae detects linear motion

Cristae detects angular motion

Question 11

Where are maculae located?

Answer 11

In the saccule and utricle

Question 12

Where are cristae located?

Answer 12

In the semicircular canals

Question 13

Vestibular functions are subserved by what?

Answer 13

Receptors located in the inner ear and a control center located in the brainstem

Question 14

Where specifically are cristae located?

Answer 14

The ampullae at the base of the semicircular canals

Question 15

What is the single flexible hair filament that protrudes from the surface of a receptor to detect movement in the macula and crista?

Answer 15

Kinocilium

Question 16

What are hair cells that project from the surface of a receptor, which cause a change in discharge frequency?

Answer 16

Stereocilia

Question 17

What are the 2 chambers of the vestibule?

Answer 17

Saccule and utricle

Question 18

The saccule senses…

Answer 18

linear motion in the vertical plane

Question 19

The utricle senses…

Answer 19

linear motion in the horizontal plane

Question 20

Where is the vestibular nucleus located?

Answer 20

The floor of the fourth ventricle spanning the pons and medulla

Question 21

How many vestibular pathways are there?

Answer 21

1 sensory and 3 motor

Question 22

What functions do the sensory pathway serve?

Answer 22

Serves the function of body awareness and spatial orientation

Question 23

What functions do the motor pathways serve?

Answer 23

Serves the function of maintaining a stable visual image while the head is moving

Serves the function of maintaining postural stability, especially during movement of the head

Question 24

Where does the sensory pathway of the vestibular system get its information?

Answer 24

Vestibular receptors and proprioceptors

Question 25

What are the vestibular receptors of the sensory pathway responsible for?

Answer 25

perceiving head position and head movement

Question 26

What are the proprioceptors of the sensory pathway responsible for?

Answer 26

perceiving body position and body movement

Question 27

Which motor pathways are ascending?

Answer 27

The medial longitudinal fasciculus

Question 28

Which motor pathways are descending?

Answer 28

The lateral and medial vestibulospinal tract