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PNS > Ear > Flashcards

Ear Flashcards

0
Q

Name the nerve which innervates the cranial surface of the auricle.

A

Great Auricular N. of C2,C3.

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1
Q

Name the arteries that supply the auricle.

A

Posterior Auricular, Superficial Temporal.

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2
Q

Lymph from the superior half of the cranial surface of the auricle drains into the?

A

Superior parotid lymph nodes

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3
Q

Name the gland that produces ear wax.

A

Ceruminous glands.

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4
Q

What is the size in diameter of the tympanic membrane?

A

1 cm

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5
Q

The tympanic membrane is the partition between the?

A

External acoustic meatus and tympanic membrane.

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6
Q

Name the shallow central peak of the tympanic membrane.

A

Umbo

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7
Q

The tympanic membrane faces anterior, inferior and laterally.
True or False?

A

True

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8
Q

The superior to lateral process of the malleus attachment on the tympanic membrane is called?

A

Flaccid part (pars flaccid)

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9
Q

The external surface of the tympanic membrane is innervated by the?

A

Auricular Nerve of vagus and auriculotemporal nerve.

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10
Q

The internal surface of the tympanic membrane is innervated by the?

A

Tympanic nerve of glossopharyngeal.

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11
Q

Name three features on the medial wall of the tympanic cavity.

A

Oval window, round window and promontory of the labyrinthine wall.

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12
Q

The space superior to the tympanic membrane in the tympanic cavity is called?

A

Epitympanic recess.

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13
Q

What indicates the floor of the tympanic cavity?

A

Jugular wall

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14
Q

Name the arteries that supply the pharyngotympanic tube.

A

Ascending pharyngeal, middle meningeal, artery of Pterygoid canal of maxillary artery.

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15
Q

The auditory ossicles transmit the sound wave from the _________ to the __________ leading to the vestibule of the bony labyrinth.

A

Tympanic membrane, oval window.

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16
Q

The ossicles are covered with regular osteogenic periosteum.
True or False.

A

False

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17
Q

Name the part of the malleus that attaches to the flaccid part of the tympanic membrane.

A

Neck of the malleus.

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18
Q

Describe the umbo.

A

Tip of the handle of the malleus.

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19
Q

The lenticular process articulates with?

A

Head of the stapes.

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20
Q

The tensor tympani inserts into?

A

Handle of the malleus

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21
Q

The head of the malleus lies in the?

A

Epitympanic recess.

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22
Q

The base of the stapes is considerably smaller than the tympanic membrane, as a result the vibratory force of the stapes is increased approximately ____ times over that of the tympanic membrane.

A

10

23
Q

The auditory ossicles increase the force of the vibrations transmitted from the tympanic membrane.
True or False?

A

True

24
Q

The tensor tympani arises from_________, and inserts to the________.

A

Superior surface of the pharyngotympanic tube, handle of the malleus.

25
Q

The tensor tympani is innervated by?

A

Nerve to medial pterygoid.

26
Q

Name the wall where the pyramidal eminence is for the stapedius muscle emergence.

A

Posterior wall.

27
Q

The Otic capsule of the internal ear contains?

A

Cochlea, vestibule and semicircular canals.

28
Q

The cochlea is the shell shaped part of the bony labyrinth that contains ___________ for the hearing.

A

Cochlear duct.

29
Q

Name the bony core of the cochlea?

A

Modiolus

30
Q

The large basal turn of the cochlea produces the _________, which is part of the labyrinthine wall of the tympanic cavity.

A

Promontory.

31
Q

Name the communicating feature between the basal turn of the cochlea and the subarachnoid space superior to the jugular foramen.

A

Cochlear aqueduct.

32
Q

Name the structure which closes the round window at the basal turn of the cochlea.

A

Secondary tympanic membrane of the round window.

33
Q

The vestibule of the bony labyrinth is a small oval chamber that contains the _________ and the __________.

A

Utricle, Saccule.

34
Q

Name the feature which communicates the vestibule to the posterior cranial fossa.

A

Vestibular aqueduct.

35
Q

No me the feature which transmits the endolymphatic duct.

A

Vestibular aqueduct.

36
Q

How many openings from the semicircular canals to the vestibule?

A

5

37
Q

The membranous labyrinth is composed of _________ and _______.

A

Sacs, ducts.

38
Q

The vestibular labyrinth contains two small communicating sacs that are known as_________ and ________.

A

Utricle and saccule.

39
Q

Name the spiral thickening of the periosteal lining of the cochlear canal, which secures the cochlear duct to the spiral canal of the cochlea.

A

Spiral ligament.

40
Q

Name the feature where the semicircular ducts open through openings with hair cells.

A

Ampulla

41
Q

Name the feature from where the endolymphatic duct arises.

A

Vestibular aqueduct.

42
Q

Name the feature which connects the saccule to the cochlear duct, as a uniting duct.

A

Ductus reuniens.

43
Q

The primary sensory neurons of the cochlear ampulae are in _________ ganglia! which are in the internal acoustic meatus.

A

Vestibular

44
Q

The cochlear duct is a spiral tube, which is firmly suspended across the cochlear canal between the __________ and _________ on the external wall of the cochlear canal and the osseous spiral lamina of the modiolus respectively.

A

Osseous spiral lamina, spiral ligament.

45
Q

Name the feature of the semilunar communication at the apex of the cochlea between two perilymph filled spiral canals.

A

Helicotrema.

46
Q

Waves of hydroelectric pressure created in the perilymph of the vestibule by the vibration of the base of the stapes ascends to the apex of the cochlea through the?

A

Scala vestibule.

47
Q

Waves of hydraulic pressure pass through the apex of the cochlea and then descends back to the basal turn of the cochlea through?

A

Scala tympani

48
Q

The receptor organ of auditory stimuli is situated on the?

A

Basilar membrane.

49
Q

The receptor organ of auditory stimuli is overlaid by?

A

Gelatinous tectorial membrane.

50
Q

Untreated Auricular hematoma might result in ________ or ________.

A

Cauliflower, boxer’s ear.

51
Q

How do you pull the helix to observe the adult’s tympanic membrane for the otoscopic examination?

A

Posterior, superior and laterally

52
Q

An earache and a bulging red tympanic membrane may indicate a sign of?

A

Otitis media.

53
Q

Infection of the mastoid antrum and mastoid cells from a middle ear infection might cause inflammation of the mastoid process known as?

A

Mastoiditis.

54
Q

Paralysis of the stapes is associated with excessive acuteness of hearing called __________ or ___________.

A

Hyperacusis, hyperacusia.

55
Q

The hyperacusis results from uninhibited movements of the?

A

Stapes.

56
Q

Motion sickness results from discordance between _________ and ____________ stimulation.

A

Visual, vestibular.

PNS (20 decks)

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