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Head & neck > 3.2 The Ear > Flashcards

3.2 The Ear Flashcards

1
Q

What separated the Middle Ear from the Outer Ear?

A

The Tympanic Membrane

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2
Q

What is the collective term for the bones in the Middle Ear?

A

The Ossicles

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3
Q

What are the names of the 3 Ossicles?

A
  1. The Malleus (Hammer)
  2. The Incus (Anvil)
  3. The Stapes (Stirup)
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4
Q

Which of the 3 Ossicles is in contact with the Tympanic Membrane?

A

The Malleus

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5
Q

What type of joint is found between the Ossicles?

A

A Synovial Joint

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6
Q

Which Ossicle is in contact with the Oval Window?

A

The Stapes

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7
Q

What are the 2 muscles related to the Ossicles?

A
  1. The Tensor Tympani Muscle?
  2. The Stapedius Muscle?
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8
Q

What is the action of the Tensor Tympani Muscle?

A

This reduces the Amplitude of Vibration by pulling on the Handle of the Malleus

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9
Q

What is the action of the Stapedius Muscle?

A

This reduces the Oscillary Range by pulling the Stapes Laterally, which tightens the Angular Ligament

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10
Q

Which 2 areas of the body does the Middle Ear communicate with?

A
  1. The Nasopharynx - via the Eustachian Tube (Pharyngeotympanic Tube)
  2. The Mastoid Antrum - via the Air Cells
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11
Q

Within which part of the Temporal Bone does the Middle and Inner Ear lie?

A

The Petrous Part

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12
Q

What does the Inner Ear consist of?

A

Series of bone-lined chambers call the Bony Labyrinth

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13
Q

What lies inside the Bony Labyrinth?

A

A series of Membranous Chambers called the Membranous Labyrinth

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14
Q

What fluid lies within the Bony Labyrinth?

A

Perilymph

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15
Q

What fluid lies within the Membranous Labyrinth?

A

Endolymph

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16
Q

What is the function of the Cochlea and the Semi-Circular Canals?

A

Balance and Hearing

17
Q

Which Cranial Nerves exits through the Internal Auditory Meatus?

A
  1. The Facial Nerve (Cranial Nerve VII)
  2. The Vestibulocochlear Nerve (Cranial Nerve VIII)
18
Q

Where dies the Facial Nerve (Cranial Nerve VII) run after passing through the Internal Auditory Meatus?

A

The Facial Canal on the Medial Wall of the Middle Ear Cavity

19
Q

What 5 Muscles are Innervated by the Facial Nerve?

A
  1. The Temporal Muscles
  2. The Zygomatic Muscles
  3. The Buccal Muscles
  4. The Mandibular Muscles
  5. The Cervical Muscles
20
Q

What is the name of the branch of the Facial Nerve (Cranial Nerve VII) which is given off in the Middle Ear Cavity?

A

The Chorda Tympani

21
Q

What does the Chorda Tympani Nerve carry?

A
  1. Parasympathetic (Pre-Ganglionic) Efferent fibers destined for Submandibular and Sublingual Salivary Glands - These are Secretomotor
  2. Sensory Fibers for the Special Sense of Taste from the Anterior 2/3 of the Tongue

Head & neck (23 decks)

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