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29 Cards in this Set
- Front
- Back
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Cranial nerves that travel with jugular vein
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CN 9, 10, 11
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Vestibular orientation
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at right angles to one another
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Part of the ear responsible for auditory fuction
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cochlea
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Structures between the cochlea and semicircular canals
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urticle and sacule
(vestibule) |
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Sensory innervation to inner ear
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CN 8- Vestibulocochlear
through the internal acoustic meatus |
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Path of the Facial nerve (CN7) in this area
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travels through the internal auditory meatus, travels over inner ear structures and bends posteriorly at the internal genu and descends in the posterior wall of the tympanic cavity adn exits the skull in stylomastoid foramen it then bends forward to give innervation to muscles of facial expression
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Arterial supply to the external ear
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Superficial temporal a.
Posterior auricular a. |
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Nervous supply to the external ear
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Auriculotemporal (V3)
Great auricular (C2,3) |
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What part of the external auditory meatus is cartilage
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lateral 1/3
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What part of the external auditory meatus is bone
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medial 2/3
tympanic portion of temporal bone |
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An excess of ear wax causes
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conduction deafness
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Overall function of the ossicles of the ear
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to give a mechanical advantage
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Innervation of the external acoustic meatus
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Auriculotemporal nerve (V3)
Facial Nerve via tympanic plexus Auricular branch of vagus |
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Where is the cone of light seen on the tympanic membrane
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anterior inferior quadrant
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Which bone of the ear cannot be seen with an otoscope on the tympanic membrane
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Stapes
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Center of tympanic membrane
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Umbo
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Smallest muscle in the body
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stapedius
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Innervation of the typanic cavity
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facial CN7
glossopharyngeal (CN 9) |
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Nerve that runs over the handle of the malleus
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chordae tympany
joins with the lingual nerve to innervate the tongue |
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Footplate of stapes sits in...
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oval window
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when the oval window pushes out...
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the round window pushes in
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Tympanic nerve
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branch of glossopharyngeal
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Connects typanic membrane to nasopharynx
Equalizes pressure in the middle ear to atmospheric pressure |
auditory (pharygotympanic) tube
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sensory part of the semicircular canal
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ampulla
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the oval window and the round window are located...
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in the vestibule
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Osseus fluid
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perilymph
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Labyrinth fluid
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endolymph
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Utricle and sacule detect...
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gravity, linear and verticle accelleration
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Can cause conduction defecits
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Wax in external acoustic meatus
Damaged tympanic membrane Otosclerosis Otis media Facial nerve lesion causing a loss of stapedius innervation |
