Audiology

Question 1

Outer Ear (2 parts)

Answer 1

auricle or pinna (outer visable part of ear which funnels sound into the ear canal)

external auditory canal(goes from the pinna to the tympanic membrane or eardrum)

Question 2

middle ear parts

Answer 2

tympanic membrane: elastic, thin, and cone shaped. Vibrates in respond to sound pressure

Ossicular Chain: suspended in the middle ear by ligaments and is composed of three tiny bones (malleus, incus, and stapes) .

2 small muscles dampen the vibrations of the tympanic membrain and the ossicular chain. the tensor tympani (CN V) and the stapedius (VII)-smallest muscle in the body

Eustacian tube: connects middle ear to nasopharynx. helps maintain equal air pressure within and outside the middle ear.

Question 3

Inner ear parts

Answer 3

most complex of the three divisions of the ear. system of interconnecting tunnels called labyrinths within the temporal bone. Tunnels are filled with a fluid called perilymph.

2 major structures: vestibular system: equilibrium, body posture, and balance
and
cochlea: snail shaped

Energy is converted into electrical impulses which stimulate the acoustic nerve

Question 4

Auditory Nervous System

Answer 4

cranial nerve VIII Acoustic nerve picks up neural impulses created by the movement of the hair cells in the cochlea.
Vestibular branch: equilibrium or balance
auditory/acoustic branch: conducts electrical sound impulses from the cochlea to the brain

exits the inner ear through the internal auditory meatus

Question 5

acoustics

Answer 5

study of sound as a physical event