Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

OS 204 Finals > OS 204 1.3 Ear - Sheet1 > Flashcards

OS 204 1.3 Ear - Sheet1 Flashcards

1
Q

Without this, one has mickey mouse ear

A

Antihelix (crura, triangular fossa)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Keeps auditory canal from collapsing

A

Antitragus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Auricle / pinna innervation

A

5 6 9 10 cervical plexus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Auricle arterial blood supply (2)

A

Posterior auricular, superficial temporal arteries

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Auricle nerves (2)

A

Great auricular nerve - cranial (medial)/back, posterolateral/front; Auriculotemporal (V3) - anterior

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Auricle lymphatic drainage (3)

A

Superficial parotid LN - lateral surface of superior; Mastoid LN - cranial surface of superior; Superficial cervical LN - rest

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

How long is the EAM?

A

2-3 cm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

To see EAM

A

Pull pinna upwards, backwards, outwards

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

2 parts of the EAM - relative length, content (glands, hair)

A

Cartilaginous - lateral 1/3; with ceruminous & sebaceous glands, hair; Bony - medial 2/3, no hair, slight pain

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Cerumen falling off the side theory

A

Epithelial migration theory

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Cone of light should be seen on what part of the tympanic membrane

A

Antero-inferior

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Tympanic membrane connected to bony canal via

A

Annular ligament

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Tympanic membrane central depression

A

Umbo

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Forms lateral wall of the superior recess of the tympanic cavity, lacks radial and circular fibers

A

Pars flaccida

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Easily vibrated component of the tympanic membrane

A

Pars tensa

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Tympanic membrane innervation (3)

A

Auriculotemporal (V3) - external; Auricular branch of vagus - some external; Glossopharyngeal - internal

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Tympanic cavity is connected antero-medially with the nasopharynx via the

A

Pharyngotympanic tube

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Tympanic cavity is connected posteriorly with the mastoid cells via the

A

Mastoid antrum

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Roof of TC separates TC from

A

Tegmental wall (tegmen tympani bone), dura

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Floor of TC separates TC from

A

Jugular wall, IJV

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Lateral wall of TC, superiorly formed by bony wall of?

A

Membranous wall, epitympanic recess

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

Medial wall of TC, feature

A

Labyrinthin wall, promontory

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

Posterior wall of TC, features (2)

A

Mastoid wall, aditus to the mastoid antrum (gas ex, cushion for more mobile TM), canal for the facial nerve

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

Anterior wall of TC, separates TC from? features (2)

A

Carotid wall, from carotid canal, opening of the pharyngotympanic, canal for tensor tympani

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Equalizes pressure in the middle ear with atmospheric pressure, allowing free movt of tympanic membrane. Orientation in children and adults?
Pharyngotympanic/auditory/Eustachian tube; children - short and horizontal (infection), adult - oblique (better draining)
26
Pharyngotympanic tube innervation
Levator veli palatini X, tensor veli palatini V3
27
Pharyngotympanic tube blood supply
Ascending pharyngeal (ECA), middle meningeal (maxillary), artery of the pterygoid canal (maxillary), pterygoid venous plexus
28
Pharyngotympanic tube lymphatic drainage
Deep cervical LN
29
1st bone to fully ossify during developemnt, lacks what
Auditory ossicles, no osteogenic periosteum
30
Malleus - head articulates with? what part lies against pars flaccida? what part embedded in TM?
incus body, neck, handle
31
Tensor tympani insertion
Handle
32
Incus articulates with stapes via
Lenticular process
33
How can the base/footplate of the stapes increase vibratory force
Smaller than TM, so increased 10x
34
Muscle and innervation - Prevents damage to internal ear when loud sounds by pulling malleus handle medially and tensing TM
Tensor tympani (V3)
35
Muscle and innervation - Prevents excessive movement of stapes, tighten annular ligament
Stapedius (7)
36
Bone denser than the remainder of petrous temporal bone often mistaken as the bony labyrinth
Otic capsule
37
Inner ear fluids in bony labyrinth vs membranous labyrinth
Bony - perilymph, high Na low K; membranous - endolymph - low Na high K like intracellular fluid
38
3 chambers of cochlea
Scala vestibuli (oval), tympani (round), media
39
Spiral thickening of the periosteal lining of the cochlear canal that secure the cochlear duct to the spiral canal of the cochlea
Spiral ligament
40
Semilunar communication at apex of cochlea
Helicotrema
41
Separates scala vestibula and media
Reissner's membrane
42
Separates scala tympani and media, this is also the location of what structure
Basilar membrane, spiral organ of Corti
43
Narrower portion is more sensitive to what sounds, wider portion for?
Narrow - high pitch, wider - low pitch
44
Cone-shaped bony core around which the spinal canal turns (how many)
Modiulus, 2.5-2.75
45
Communication between basal turn of cochlea to the subarachnoid space
Cochlear aqueduct
46
Hair cells of spiral organ
1 row inner hair cells (without MT), 3 rows outer hair cells (amplification)
47
Hair cells are in contact with what?
Tectorial membrane; depolarizes when hair moves
48
Accessory hair cells for nutrition and regeneration
Hensen's cells and Deeter's cells
49
Blood supply and nutrients along spiral ligament
Stria vascularis
50
In the roof of the cochlear duct, transmits endolymphatic duct into 2 small bv
Vestibular aqueduct
51
Uniting duct between saccule and cochlear ducts
Ductus reuniens
52
Maculae for sensing horizontal and vertical movement
utriculi - horizontal; sacculi - vertical
53
Innervate hair cells in maculae
Vestibulocochlear 8
54
Ear develops what AOG? What germ layer?
4th wk; all! ecto - skin; meso - vessels; endo - linings
55
Internal ear AOG
3rd-6th wk
56
Auditory pit; first rudiment of the ear
Otic pit
57
Fluid in scala vestibuli, tympani, media
vestibuli and tympani - perilymph, media - endolymph
58
Dorsal utricular portion becomes blank and ventral saccular portion becomes blank
dorsal utricular -> semicircular canals; ventral saccular -> cochlea
59
Hillocks of His (pinna)
1st - tragus; 2nd,3rd - helix, 4th,5th - antihelix, 6th - antitragus
60
Short waves/ high pitch waves causes displacement of basilar membrane near blank; long waves/low pitch?
short wave/high pitch - near oval window; long wave/low pitch - near apex of cochlea (*hearing loss begins at loss of high pitch sounds)
61
Neural pathway (ECOLIMA)
CN8 -> cochlear nucleus -> superior olivary complex (ipsilateral) -> lateral lemniscus -> inferior colliculus -> medial geniculate -> auditory complex (one side brain damage, both ears can still hear)
62
sensory organ of rotation, with gelatinous mass
crista ampullaris, with cupula
63
Reflex to stabilize image on retina during head movement, tested by
vestibulo-ocular reflex / doll's eye movement; caloric reflex test
64
Increase in intensity (ratio), 2 mechanisms
22:1; area effect (foot plate), lever mechanism (malleus handle longer than incus process)
65
Inflammation of external acoustic meatus
otitis media; swimmers
66
Injuries of peripheral auditory system causes 3 major symptoms
Hearing loss (usu. conductive), vertigo, tinnitus
67
Interfered movement of oval/round windows; own voice sounds louder; solution?; the other kind of hearing loss and solution? hehe
Conductive hearing loss; surgical or hearing aid device;; sensorineural - cochlear implants :)
68
blockage of cochlear aqueduct
Meniere's syndrome

OS 204 Finals (4 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions