Hearing & Vestibular Sense Flashcards Preview

MCAT Pysch/Soc > Hearing & Vestibular Sense > Flashcards

Flashcards in Hearing & Vestibular Sense Deck (31)
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1

Outer ear consists of:

Pinna (auricle)
External auditory canal
Tympanic membrane

2

Middle ear consists of:

The ossicles: malleus and staples

3

Inner ear consists of:

Bony labyrinth

4

Pinna function

Channels sound waves into the external auditory canal

5

External auditory canal directs:

The sound waves to the tympanic membrane (eardrum)

6

Louder sounds = _____ intensity

Greater

7

What separates the outer ear from the middle ear

Tympanic membrane

8

Ossicles

Found in the middle ear

Helps transmit and amplify the vibrations from the tympanic membrane to the inner ear

9

Malleus (hammer)

Attached to the tympanic membrane

Acts on the incus (anvil) which acts on the staples (stirrup)

10

Cochlea

Entrance to the inner ear

Staples rest on it

11

Ossicles is made up of 3 parts. What are they ?

Staples
Malleus
Incus

12

The middle ear is connected to the nasal cavity via what?

Eustachian tube

13

Eustachian tube function?

Helps equalize pressure between the middle ear and the environment

14

Bony labyrinth contains:

Cochlea
Vestibule
Semicircular canals

15

(3) parts an ear is divided into

Inner, middle and outer ear

16

What thin layer of fluid simultaneously transmits vibrations from the outside world and cushions the inner ear structures ?

Perilymph

17

Cochlea

Detects sound

Spiral shaped organ divided into 3 parts called Scalae

18

Organ of corti

Actual hearing apparatus

Contains thousands of hair cells bathed in endolymph

19

Basilar membrane

Thin flexible membrane under the organ of corti

20

Tectorial membrane

Immobile membrane on top of the organ of corti

21

Sound enters the cochlea through the oval window and causes vibrations in the Perilymph which are transmitted to which membrane ?

Basilar membrane

22

Round window

A membrane covered hole in the cochlea that permits the Perilymph to actually move within the cochlea

23

Hair cells on the organ of corti function ?

Converts the physical stimulus into an electrical signal which is carried to the CNS by the auditory (vestibulocochlear) nerve

24

Bony labyrinth is filled with

Perilymph

25

Utricle and saccule

Is in the vestibule that is a portion of the bony labyrinth

Detect linear acceleration

Contain modified hair cells covered with otoliths (which resist motion as the body accelerates)

26

Semicircular canals

Detect rotational acceleration

27

Auditory pathway

Cochlea ➡️ vestibulocochlear nerve and medial geniculate nucleus (MGN) ➡️ auditory cortex in the temporal lobe

28

Auditory group is found in what lobe?

Temporal

29

Superior olive

Localizes the sound

30

Inferior colliculus

Helps keep the eyes fixed on s point while the head is turned

Involved in the startle reflex