Hearing & Vestibular Sense Flashcards Preview

MCAT Pysch/Soc > Hearing & Vestibular Sense > Flashcards

Flashcards in Hearing & Vestibular Sense Deck (31)
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1
Q

Outer ear consists of:

A

Pinna (auricle)
External auditory canal
Tympanic membrane

2
Q

Middle ear consists of:

A

The ossicles: malleus and staples

3
Q

Inner ear consists of:

A

Bony labyrinth

4
Q

Pinna function

A

Channels sound waves into the external auditory canal

5
Q

External auditory canal directs:

A

The sound waves to the tympanic membrane (eardrum)

6
Q

Louder sounds = _____ intensity

A

Greater

7
Q

What separates the outer ear from the middle ear

A

Tympanic membrane

8
Q

Ossicles

A

Found in the middle ear

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

9
Q

Malleus (hammer)

A

Attached to the tympanic membrane

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

10
Q

Cochlea

A

Entrance to the inner ear

Staples rest on it

11
Q

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

A

Staples
Malleus
Incus

12
Q

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

A

Eustachian tube

13
Q

Eustachian tube function?

A

Helps equalize pressure between the middle ear and the environment

14
Q

Bony labyrinth contains:

A

Cochlea
Vestibule
Semicircular canals

15
Q

(3) parts an ear is divided into

A

Inner, middle and outer ear

16
Q

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

A

Perilymph

17
Q

Cochlea

A

Detects sound

Spiral shaped organ divided into 3 parts called Scalae

18
Q

Organ of corti

A

Actual hearing apparatus

Contains thousands of hair cells bathed in endolymph

19
Q

Basilar membrane

A

Thin flexible membrane under the organ of corti

20
Q

Tectorial membrane

A

Immobile membrane on top of the organ of corti

21
Q

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

A

Basilar membrane

22
Q

Round window

A

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

23
Q

Hair cells on the organ of corti function ?

A

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

24
Q

Bony labyrinth is filled with

A

Perilymph

25
Q

Utricle and saccule

A

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
Q

Semicircular canals

A

Detect rotational acceleration

27
Q

Auditory pathway

A

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

28
Q

Auditory group is found in what lobe?

A

Temporal

29
Q

Superior olive

A

Localizes the sound

30
Q

Inferior colliculus

A

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

Involved in the startle reflex

31
Q

Swaying of hair cells cause what to open?

A

Ion channels

Which cause receptors potentials