SPAUD 210: 4/22

mechanical energy, electrochemical energy

the ear shows how the anatomy brings in _____ and changed them to ______

peripheral auditory system

what system has the function to collect sound waves and transform the sound waves from mechanical to electrochemical energy

central auditory system

what system has the function to interpret the electrochemical signals (recognize/differentiate/organize sounds)

auricle/pinna

visible part of the ear

pinna

auricle/pinna

helps with localizing sound

helix

1

external auditory meatus

antihelix

concha

tragus

antitragus

earlobe

cymba and cave

what is the concha composed of?

microtia

small pinna

anotia/aplasia

pinna failed to develop

scaphoid fossa

cymba of concha

F

cave of concha

triangular fossa

crus of helix

intertragal incisure

slightly S shaped

what shape is the external auditory meatus

external auditory meatus

has the function of conducting sound to the tympanic membrane

cartilaginous

what is the outer 1/3 of the external auditory meatus?

bone

what is the inner 2/3 of the external auditory meatus?

down, to drain fluid

how does the EAM slope?

cilia and cerumen

what is the outer 1/2 of the EAM lined with?

hair cells to filter dust

what is the function of the cilia?

helps keep ear from drying out

traps dust

helps keep out insects

function of cerumen?

horizontal

kids EAM are more ____ than adults

tightly

ear epithelial tissue is ___ bound to the bone underneath

eardrum

what is the tympanic membrane also called?

1. outer circular layer

2. intermediate fibrous layer

- superficial layer of fibers that radiate out from center

- deep layer of circular fibers

3. inner mucous layer

what are the layers of the tympanic membrane?

intermediate fibrous layer

what layer of the tympanic membrane is the toughest?

malleus

what pulls the tympanic membrane internally?

pearly-gray

what color should the tympanic membrane be?

dark red

what color shouldn't the tympanic membrane be?

malleolar stria

1:00, 11:00

the malleolar stria is at ____ for the R ear and ___ for the L ear

pars flaccida

loose at the very top, part of TM

pars flaccida

pars tensa

pars tensa

tense part of the tympanic membrane, most of the area

anterior and posterior malleolar folds

umbo

umbo

bottom part where the malleus is connected to the tympanic membrane

cone of light

if you shine light, a healthy ear reflects this

cone of light

7

a clear cone of light

what does a perforated tympanic membrane not have?

air

what is the middle ear filled with?

1. oval window

2. round window

3. promontery

what does the medial wall of the middle ear contain?

oval window

where the footplate of the stapes fits into

round window

has a membrane over it (of the middle ear)

promontory

bump between both windows where part of the cochlea pushes out

malleus, incus, stapes

what are the ossicles?

oval window

round window

promontory

bump between two windows

malleus

manubrium

head

neck of malleus

2

anterior/lateral process

incus

corpus of incus

short process of incus

1

long process of incus

articular facet

lenticular process

manubrium or the anterior process of malleus

tensor tympani is attached to ______

head of stapes

neck of stapes

anterior and posterior crus

footplate of stapes