Cochlear Vibrations Flashcards
How does the phase of vibration alter along the partition?
Changes in a continuous way, so that more apical points lag more stapedial ones
Name given to the upper compartment of the scale media?
Scala vestibuli
What is the scala tympani?
Lower compartment of the scala media
How does stapes act as a plunger?
Moves in the oval window sending a pressure wave into scala vestibuli
What is the helicotrema?
Small hole at apex cochlear partition
What is the function of the helicotrema?
Prevent the cochlear partition vibrating at sub-auditory frequencies
In principle, which structure equalises pressure on either side eardrum?
Eustachian tube
What type of wave does the cochlear partition execute within its envelope of vibration?
Travelling wave - moving from stapes towards apex
What is meant by a tonotopic map?
Different frequencies mapped out along the cochlear partition
How does the phase of vibration change along cochlear partition?
More apical points lag more stapedial ones
