HW 9
What is the function of the basilar membrane analogous to?
A bank of band-pass filters
What is the function of the stria vascularis analogous to?
A battery
What are the characteristics of cochlear hearing loss?
A loss of cochlear compression, a reduction in the active process, and a reduction in outer outer hair cell motility.
The basilar membrane vibrates optimally for high-frequency sounds in which specific location?
Base of the cochlea
What is the name of the membrane upon which the organ of Corti sits?
Basilar membrane
What are the support cells?
Boettcher's cells, cladius' cells, and hensen's cells
Where does the scala vestibuli join the scala tympani?
Helicotrema
What are the sensory cells?
Inner hair cells
What are habenula perforata?
Openings in the spiral lamina though which nerve fibers pass
What is the sense organ of hearing?
Organ of Corti
What are the sense organs found in the inner ear?
Organ of Corti, cristae ampullares, and maculae.
Which type of cells have an electromotility function?
Outer hair cells
What is the name of the protein in the wall of the outer hair cell that is responsible for its motility function?
Prestin
What is the name of the upper surface of the organ of Corti?
Reticular lamina
What is an example of direct current potential?
Summating potential
The basilar membrane is thickest in which part of the cochlea?
The apex
What is tonotopicity?
The correspondence between the frequency of a sound and the place along the cochlea that is stimulated.
What is endolymph?
The fluid in the scala media
What are the nonlinear cochlear responses of an active process?
The generation of distortion products, compression, and suppression.
What is the osseous structure in the center of the cochlea?
The modiolus
The organs of hearing and balance are located in which portion of the temporal bone?
The petrous
What membrane separates the scala vestibuli from the scala media?
The reissner
What is endocochlear potential?
The resting potential between the endolymph in the scala media perilymph in the scala vestibuli and scala tympani.
What is cochlear compression?
The shallow, non-linear growth of basilar membrane displacement at mid-to-high stimulus intensities.
