Ear Flashcards
Auricle
skin and elastic cartilage
collect sound waves
Inn for mm of auricle
Facial N
Sensory Inn to External Auditory Meatus
Auriculotemporal N and Auricular Branch of Vagus N
External Auditory Meatus
tube leading to tympanic membrane
Lymph Drainage of External Ear
Superficial Parotid, Mastoid, Superficial Cervical Lymph Nodes
Appearance of Tympanic Membrane
Pearly gray and concave
Umbo
depression in center of tympanic membrane
Location of Middle Ear
Petrous part of temporal bone
Auditory Tube
Eustachian Tube
connects middle ear to nasopharynx
What does the back of the Middle Ear connect to?
Middle Antrum
Roof of Tympanic Cavity
Tegman Tympani (part of temporal bone) separates tympanic cavity from temporal lobe
Floor of Tympanic Cavity
Bone separating cavity from internal jugular vein
Opening on Anterior Wall of Tympanic Cavity
Auditory Tube
Tensor Tympani
Posterior Wall of Tympanic Cavity
opening to mastoid antrum
pyramid
Medial Wall of Tympanic Cavity
Promontory Fenestra Vestibuli (oval window) Fenestra Cochlea (round window)
Lateral Wall
Tympanic Membrane
Auditory Ossicles
Malleus, Incus, Stapes
Tensor Tympani
from auditory wall to handle of malleus
dampens vibrations of tympanic membrane
Inn of Tensor Tympani
V3
Stapedius
from pyramid to neck of stapes
dampens vibrations of stapes
Inn of Stapedius
Facial N
Auditory Tube Function
equalize pressure of middle ear w/ atmospheric pressure
Aditus
connectus Middle Ear to Mastoid Antrum
Tympanic Nerve
from CN 9
inn mucosa of middle ear
branches into lesser petrosal n
Lesser Petrosal N
from tympanic n
pre para to otic ganglion via foramen ovale
