Exam 3: Auditory System Flashcards
What are the bones of the middle ear from lateral to medial?
Malleus
Incus
Stapes
What are the soft tissue windows the bones of the middle ear attached to? Which bones attach to which windows?
Vestibular window: stapes
Tympanic membrane: malleus
What muscle is attached to the malleus? Who innervates it?
Tensor tympani muscle
CN 5 mandibular branch
What muscle is attached to the stapes? Who innervates it?
Stapedius muscle
CN 7
What are 2 ways for an otitis media/interna to cause meningitis?
Facial canal-stylomastoid foramen
Cochlear canaliculus
What did the receptor organs of Dr. Little’s auditory lecture and Dr. Moore’s smell and taste lecture have in common?
Bipolar neurons
Where can bipolar neurons be found in the body?
Nasal cavity (olfactory/smell) Inner ear (vestibular/balance and cochlear/hearing) Retina
Why makes the endolymph of the cochlear duct?
Stria vascularis
What membrane does the organ of corti live on?
Basilar membrane of the cochlear duct
What scala is separated by the organ of corti from the cochlear duct?
Scala tympani
What lemniscus carries sound information toward which colliculus?
Lateral lemniscus to the caudal colliculus
What pathway is used for the acoustic reflex?
Medial tectospinal tract
What is the best way to test for hearing in a dog?
BAER testing
What are the 2 types of deafness?
Conduction and sensorineural
What kind of deafness would an old dog have? Why?
Conduction
Ossicles stiffen
