Flashcards in W21-L7: Ear and Auditory Tube Deck (18):
What is the role of the auricle?
What is the lateral 1/3 of the external acoustic meatus and what is the medial 2/3?
Medial 2/3= Temporal bone
What nerve innervates the posteroinferior surface of the external acoustic meatus?
What nerve innervates the anterosuperior surface of the external acoustic meatus and external surface of tympanic membrane?
Auriculotemporal nerve (V3)
What shape is the external surface of the tympanic membrane?
Where is the cone of light on the external surface of the tympanic membrane?
Where is the Epitympanic recess and where does it go?
Superior to tympanic membrane, connects to mastoid air cells
Where is the tympanic cavity proper?
Directly medial to the tympanic membrane
What are the ossicles called?
Stapes, Incus and Malleus
What muscle is on the anterior aspect of the medial wall of middle ear?
Tensor Tympani (CN V)
What does the tensor tympani attach to?
What muscle is on the posterior aspect of the medial wall of middle ear?
Stapedius muscle (CN VII)
What does the Stapedius muscle attach to?
What is the bony labyrinth filled with?
What is the Membranous labyrinth filled with?
What are the there semi-circular ducts?
Anterior, Horizontal and Posterior
Where are the ampulla situated and what do they sense?
Base of the semi-circular ducts which sense dynamic changes in equilibrium