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Head and Neck Anatomy -ATSU > Middle Ear (week 3) > Flashcards

Middle Ear (week 3) Flashcards

1
Q

What two branches of the External carotid artery supply blood to the External ear

A

Posterior Auricular and Superficial Temporal

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2
Q

What branch of the Maxillary artery supplies blood to external ear

A

Deep Auricular

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3
Q

All branches of arteries that supplies blood to external ear

A

Deep Auricular, Superficial Temporal and Posterior Auricular

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4
Q

two parts that make up the tympanic membrane

A

Flaccid part and Tense part

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5
Q

Where is the flaccid part of the tympanic membrane in relation to the tense part?

A

Superior

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6
Q

What innervates the external portion of the tympanic membrane

A
  1. Cervical Plexus - Great Auricular
  2. CN V3 - Auriculotemporal n.
  3. Cn VII, X - Small auricular branches
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7
Q

What innervates the internal portion of the tympanic membrane

A

CN IX - Tympanic Plexus

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8
Q

What does the Tegmen Tympani do?

A

Separates middle ear from middle cranial fossa

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9
Q

What does the floor of the middle ear do?

A

Separates middle ear from internal jugular vein

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10
Q

What is in the lateral portion of the middle ear

A

Chorda Tympani, Tympanic membrane and Epitympanic recess

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11
Q

What is contained in the medial wall of the middle ear

A

Promontory, Tympanic Plexus, Oval (vestibular) window and Round (cochlear) window d

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12
Q

What is in the Anterior portion of the middle ear wall

A

Auditory Tube and Canal for Tensor Tympani

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13
Q

Which auditory ossicle is attached to the tympanic membrane?

A

Malleus

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14
Q

What are the three auditory ossicles

A

Incus, Malleus and Stapes

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15
Q

What shape does the stapes look like?

A

A stirrup

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16
Q

What shape does the malleus look like

A

Hammer

17
Q

Two muscles in the ear

A

Tensor Tympani and Stapedius

18
Q

Attachment of Stapedius

A

Pyramidal process on posterior wall to Stapes

19
Q

Attachment of Tensor Tympani

A

Pharyngotympanic tube to the malleus

20
Q

Innervation of Tensor Tympani

A

V3

21
Q

Innervation of Stapedius

A

CN VII

22
Q

Action of Stapedius

A

Decreases vibrations of stapes

23
Q

Action of Tensor Tympani

A

Pulls malleus medially to tense tympanic membrane

24
Q

Purpose of Pharyngotympanic tube

A

Purpose is to equalize pressure between exterior and middle ear

25
Q

What three muscles are involved in opening of the pharyngotympanic tube?

A

Levator Veli Palitini, Tensor veli palitini and Salpingopharyngeus muscles

26
Q

Which two of the three muscles are attached to the pharyngotympanic tube

A

Tensor Veli Palitini and Salpingopharyngeus muscles

27
Q

What innervates the external ear

A
  1. Cervical Plexus - Great Auricular
  2. CN V3 - Auriculotemporal nerve
  3. CN VII, X - Small auricular branches

Head and Neck Anatomy -ATSU (35 decks)

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