HTS Flashcards
(28 cards)
What is the external ear composed of
Pinna, auditory canal and tympanic membrane
What is the snail shaped organ
Cochlea
This is also known as a the stirrup
Stapes
How can we identify where the sound is coming from?
Impedance matching
What are the important structures for impedance matching
Tympanic membrane
Ossicles
Function of the attenuation reflex
Protects the cochlea
Masks low frequency
decreases sensitivity to speech
The sensitivity to hearing is how many decibels
15-20
2 important muscles for attenuation reflex
Tensor tympani
Stapedius muscle
What pushes the malleus inward in attenuation reflex
Tensor tympani muscles
Pushes the stapes outward in attenuation reflex
Stapedius muscle
Contraction of both stapedius and tensor tympani will cause
Rigidity of the ossicles
This separates Scala vestibule from Scala media
Reissner’s membrane
Vestibular membrane
It separates the Scala media from the Scala tympani
Basilar membrane
This is the bony center of the cochlea
Modiolus
What is the tip of the cochlea
Helicotrema
High pitched or high frequency sounds terminate where
Base
This method used by the cns to detect different sound frequencies
Place principle
What is the organ for audition
Organ of corti
What is the longest and largest stereocilia
Kinocilia
Where is the endolymph located
Inside the Scala media
Unit of measurement to determined the change in loudness
Decibel
How are we able to localize the sound and what supervises it
Time lag principle
Medial Superior Olivary Nucleus
What supervises when someone is talking louder on the other side
Lateral superior Olivary nucleus
Nerve deafness is also known as
Sensory neural deafness
