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7 Cards in this Set
- Front
- Back
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6 Borders of Middle Ear
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Lateral: Tympanic Membrane
Medial: Oval window and Round window Anterior:(Carotid) seperates interanl carotid and allows opening of auditory tube Posterior: (Mastoid) seperates Mastoid air cells Floor: (Jugular) seperates Internal jugular artery Roof: Tegmen Tympani seperates from middle cranial fossa |
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Contents of Middle Ear
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1- Auditory Ossicles
(Malleus, Incus, Stapes) 2- Chorda tympani nerve and tympanic nerve plexus 3-tendons of tensor tympania and stapedius muscle |
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Inner ear:
Where located? Function? Contents? |
Petrous portion of temporal bone
Equilibrium semicircular ducts & Canals Vestibule Cochlea |
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Sensory Innervation
Auricle |
Greater Auricular C2-3
Lesser Occipital C2 Auricular Branch of Vagus |
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What is the Sensory Innervation to both:
External Acoustic meatus External surface of tympanic membrane |
Auriculotemporal (V3 Mandibular)
and some CN 7 and X |
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Sensory innervation to
Middle ear Cavity Auditory tube Internal Surface of tympanic membrane |
Tympanic Branch of Glossopharyngeal via tympanic plexus
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Sensory Innervation to
Inner Ear |
Special Sensory:
Vestibulocochlear (CN 8) Cochlear part to organ of Corti Vestibular part to maculae and cristae |
