Anatomy of the ear Flashcards

1
Q

Contents of the temporal bone of the skull?

A

Organs of hearing and balance

Facial (CN VII) and vestibulocochlear (CN VIII) nerves

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2
Q

Structures passing through the internal acoustic meatus?

A

Facial and vestibulocochlear nerves

Labyrinthine artery + vein

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3
Q

Functions of the facial nerve?

A

Motor:
muscles of facial expression, stapedius

Parasympathetic:
salivary and lacrimal glands

Special sensory:
taste in the anterior 2/3rds of the tongue

Somatic sensory: external ear

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4
Q

Sensory innervation of the glossopharyngeal nerve?

A

Middle ear, Eustachian tube, nasopharynx, oropharynx and tonsils

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5
Q

What causes mastoiditis?

A

Extension of middle ear infection into the mastoid antrum from the epitympanic recess, via the aditus ad antrum

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6
Q

Contents of the inner ear?

A

The bony labyrinth filled with perilymph; the membranous labyrinth “floating” within the perilymph

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7
Q

Inner ear contents responsible for vestibular sensation?

A

Semicircular ducts, utricle and saccule

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