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27 Cards in this Set
- Front
- Back
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Auricle consists of
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skin
cartilage (elastic) Intrinsic and extrinsic muscles (CN7) |
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Blood supply of the Auricle
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Posterior Auricular (from external carotid)
Anterior Auricular (from superficial temporal) |
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Sensory innervation of the auricle
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cervicle plexus - lesser occipital and great auricular nerves
CNs- Auriculotemporal (V3) Facial and Vagus |
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External acoustic meatus extends from
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concha to tympanic membrane
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External acoustic meatus contains
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hair and modified sweat glands that produce cerumen (earwax)
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main sensory innervation of the external acoustic meatus
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V3 and 10
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tympanic membrane sensory innervation on outer surface
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5, 7 and 10
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tympanic membrane sensory innervation on inner surface
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9
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middle ear is located in what bone?
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temporal bone
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what part of the ear will you find ossicles?
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middle ear
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what are the two parts that make up the middle ear?
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tympanic cavity
epitympanic recess |
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middle ear communicates with nasopharynx via the
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pharyngotympanic tube
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detects direction of movement (rotational acceleration)
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lateral semicircular duct (crista)
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detects linar acceleration
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Utricle and Saccule (macula)
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membranous labryinth consists of
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semicircular ducts
cochlear duct utricle saccule |
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membranous labryinth is filled iwth
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endolymph
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bony labyrinth consists of
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vestibule
cochlea semicircular canals |
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bone labyrinth is lined with
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periostium
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bone labyrinth is filled with
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perilymph
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inner ear is located entirely within
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petrous part of the temporal bone
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Malleus attaches to the
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Tympanic membrane
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Stapes attaches to the
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oval window
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Incus attaches to
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Malleus and Stapes (connecting them)
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Tensory Tympani attaches to
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malleus
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Tensor Tympani is innervated by
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Nerve to medial Pterygoid (branch of V3)
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Stapedius attaches to
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stapes
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Stapedius is innervated by
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nerve to the stapedius (Branch of CN VII)
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