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Anatomy W Lei > Ear And Oral Cavity > Flashcards

Ear And Oral Cavity Flashcards

1
Q

External ear boundaries and functions

A

From pinna/auricle to tympanic membrane
Function: collecting sound waves

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2
Q

Ear auricle make

A

Elastic cartilage as the scaffold

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3
Q

Ear auricle somatic sensation

A

Variable mappings
CN 5, 7, 9, 10
Lesser occipital nerve: C2 ventral ramus
Greater auricular nerve: C2 and C3

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4
Q

Middle ear boundaries

A

Between tympanic membrane and bony cages for vestibulocochlear organs

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5
Q

Middle ear function

A

Transforming sound waves into controllable mechanical vibrations

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6
Q

Tympanic cavity: contents

A

Auditory ossicles
Pharyngotympanic tube (eustachian tube)

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7
Q

Malleus

A

“Handle” interacts w/ tympanic membrane
*chorda tympani nerve runs medial to handle

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8
Q

Auditory ossicles (3)

A

Mallius, incus, and stapes
Lateral → medial

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9
Q

Tympanic cavity boundaries

A

Lateral Wall: tympanic membrane
Medial wall: labyrinthine
Roof: segmental part of the temporal bone (middle cranial fossa)
Floor: Internal jugular vein
Anterior wall: Internal carotid artery
Posterior wall: mastoid sinus

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10
Q

Tympanic cavity: medial wall

A

Labyrinthine
Innervation: CN 7 - facial nerve
Contents: promontory w/ tympanic plexus, oval and round window, and horizontal semicircular canal

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11
Q

Branches of CN 9

A

Tympanic nerve
Stylopharyngeal nerve
Lingual branches
Communicating branches to the vagus nerve anastomosis
Carotid branch

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12
Q

Carotid branch of CN 9

A

Bifurcation of the common carotid artery, visceral sensory not following visceral motor

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13
Q

Tensor tympani

A
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14
Q

Stapedius

A

P: pyramidal eminence
Di neck of stapes
I: nerve to stapedius (cn 7)
A: dampening vibrations passed to the cochlea via the oval window

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15
Q

Hyperacusis

A

A disorder in loudness perception

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16
Q

Inner ear boundaries

A

From vestibulocochlear organs to the internal acoustic meatus

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17
Q

Vestibular system

A

Otolith organs
Semicircular canals
Sensory receptors

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18
Q

Otolith organs

A
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19
Q

Semiscircular canals

A
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20
Q

Sensory receptors

A

Hair cells

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21
Q

Benign paroxysmal positional vertigo (bppv)

A

Dislodge of the otocnia into the semicircular canals
** mainly from the utricle
** most common and misdiagnosed “dizziness”
Signs/symptoms: nystagmus, interaction of CN 6 and 8

22
Q

Cochlear system

A

Hearing
1. Scala vestibuli
2. Scala media: organ of corti, hair cells as the sensory receptor
3. Scala tympani

23
Q

Cochlear system: Scala vestibuli

A
24
Q

Cochlear system:

A
25
Q

Cochlear system:

A
26
Q

Inner ear innervation: cochlear component

A

Cochlear division of CN 8

27
Q

Inner ear innervation: cochlear component

A

Cochlear division of CN 8

28
Q

Innervation of inner ear

A
29
Q

Localization

A

Distance and location from sound origin

30
Q

Blood supply to inner ear

A

Labyrinth

31
Q

Oral cavity boundaries

A

Anterior: oral orifice, orbicularis oris
Lateral buccinator
Posterior: pterygomendibular raphe
Roof: hard and soft palate
Floor: myohyoid and

32
Q

Hard palate bones

A

Maxilla and Paladin

33
Q

Teeth

A

Specialize skin appendage
Parts: crown, root, neck, pulp cavity
32 in adult teeth (-4 for removal of wisdom teeth)

34
Q

Oral cavity innovation

A

Maxillary nerve: buccal nerve, superior alveolar nerve (post, middle, ant)
Mandibular nerve

35
Q

Soft palate muscles

A

Tensor veli palatini
Levator veil palatini
Uvula

36
Q

Tensor veli palatini

A

Lateral

37
Q

Levator veli palatini

A
38
Q

Uvula

A
39
Q

Tongue parts and functions

A

Oral part
Pharyngeal part
Function: stir and mix food, taste, and speech

40
Q

Tongue: oral part

A
41
Q

Tongue: pharyngeal part

A
42
Q

Tongue: pharyngeal part

A
43
Q

Extrinsic tongue muscle: palatoglossus

A
44
Q

Extrinsic tongue: styloglossus

A

P: styled process
Di lateral tongue and blending

45
Q

Extrinsic tone muscle: hyoglossus

A
46
Q

Extrinsic tongue muscle: genioglossus

A

P: superior mental spire
D: inferior tongue

47
Q

Intrinsic tongue muscles functions

A

Stir and mix the food and speech

48
Q

CN 12 deficiency

A

Imbalance of bilateral intrinsic and extrinsic muscles
* protrusion of the tongue will deviate to the weaker side: opposite to the muscular deficiency

49
Q

Soft palate arches

A

Anteriorly: palatoglosseal
Posteriorly: palatopharyngeakl

50
Q

Tongue: sensation

A
51
Q

Salivatory glands function

A

Moisture to the mucosal surface of the oral cavity
Mix food during mastication
Digest starch

52
Q

Saliatory glands: visceral innervation

A

Anatomy W Lei (16 decks)

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