Vestibular System

Question 1

Vestibular labyrinth

Answer 1

peripheral component of the vestibular system formed by the interconnected chambers/canals continuous with the cochlea

Question 2

Vestibular labyrinth uses ____ as the sensory receptor cells to transduce physical motion into neural imputes.

Answer 2

mechanoreceptors (hair cells)

Question 3

Vestibular labyrinth consists of two otoliths:

Answer 3

utricle/sacclule and three semicircular canals

Question 4

Utricle and saccule are specialized to respond to

Answer 4

linear accelerations of the head and static head position relative to the gravitational axis.

Question 5

Semicircular canals are specialized to respond to ___

Answer 5

rotational accelerations of the head

Question 6

Vestibular hair cells are located in the utricle and saccule at the ____

Answer 6

ampullae

Question 7

Movement of the stereocillia toward the kincilium causes ____

Answer 7

gated channels to open, depolarizing vestibular hair cells and causing transmitter release onto the vestibular nerve fibers of vestibular ganglion neurons.

Question 8

Movement away from the kinocilum causes ___

Answer 8

hyperpolarization and reduces neuronal firing of ganglion neurons

Question 9

What structure in the utricle/saccule separates hair cells into two populations with opposing hair bundle polarities?

Answer 9

Striola

Question 10

Otoliths are formed by

Answer 10

crystals of calcium carbonate called otoconia.

Question 11

Macula:

Answer 11

sensory epithelium of the utricle and saccule, which consists of hair cells and associated supporting cells.

Question 12

Matching question associating structures w/ something.

Answer 12

Semicircular canal and Cristia

Question 13

Response to head tile:

Answer 13

tonic: hair bundle displaced

Question 14

Response to linear acceleration (forward)

Answer 14

transient hair bundle displacement

Question 15

Midterm Question:
Linear Acceleration

Question 16

Crista

Answer 16

Sensory epithelium of the semicircular canals inside the ampulla, containing the hair cells

Question 17

Cupula

Answer 17

dome-shaped gelatinous mass over hair bundles, where hair bundles extend into

Question 18

Semicircular canals sense ____

Answer 18

head rotations

Question 19

Final Question

Answer 19

know function of semicircular canal and ________

Question 20

Midterm Question:

Answer 20

When rotating or turning the head to right, vestibular hair cells in the right horizontal canal are depolarized and vestibular hair cells in the left horizontal canal are hyper polarized.

Question 21

Midterm Question: What is the function of the vestibule-ocular reflex?

Answer 21

Stabilize gaze

Question 21

Central vestibular processing is multi sensory nature and vestibular inputs are integrated with inputs from

Answer 21

visual and somatic sensory system (proprioceptors)

Question 22

Many neurons in vestibular nuclei function as

Answer 22

premotor neurons (upper motor neurons)