Cochlea anatomy
Name the three cochlea partitions.
What is the Scala vestibuli, Scala media and Scala tympani?
Thick, wide, flaccid and has low frequency resonance.
What is the apex
The three main divisions of this structure are Dorsal Cochlear Nucleus (DCN), Posterior Ventral Cochlear nucleus (PVCN) and Anterior Ventral Nucleus (AVCN). It is also apart of Wave V.
What is Inferior Colliculus.
The inner ear is believed to mimic this household item.
What is a battery?
The apex of the cochlea and where the scala vestibuli and the scala tympani communicate.
What is the helicotrema?
Caused by movements of the BM and the deflection of stereocillia.
What is shearing?
The function of the inner ear is to convert mechanically represented stimuli into what?
What are electrical signals?
"Use it or lose it". What happened to neural synapses that do not get exercised or used.
What is neural pruning?
As fluid pushes the BM up and the cilia are bent towards the longest cilia, an excitatory stimulation.
What is depolarization?
Membrane that separates the scala vestibuli and scala media.
What is Reissner's membrane?
The 4 main proteins that work in the cochlea.
What is actin, myosin, pristine and connexin?
What is characteristic frequency?
Mandatory stops in the ascending pathway.
What are the cochlear nucleus, inferior colliculus and MGB?
This theory requires information about the timing of neural firing (i.e phase locking) to accurately represent frequency.
What is temporal/volley theory?
This membrane sits above organ of Corti, in contact with tallest OHC stereocilia
What is the tectorial membrane?
A physical amplification of the BM motion, with max amplification occurring especially at low sound levels.
What is the cochlear amplifier?
This is used for for localization and binaural hearing and helps contribute to the head shadow affect.
What is the superior olivary complex?
The structure that allows the two hemispheres to communicate and as we get older, myelination increases which allows for faster communication between hemispheres
What is the corpus calllosum?
Our body is strongly contralateral which give advantage in time and performance to this ear.
What is the right ear?
Located on the lateral wall of scala media; the “battery” of the ear
This input moves from the inner hair cells to higher auditory structures.
What is Afferent input?
Shortest pathway from cochlea to the cortex.
The 4 main hemispheres of the brain
What are the frontal, parietal, temporal and occipital lobes?
What is tonotopic organization?