Auditory Nerve Physiology and Action Potentials Quiz

The Timing Theory applies for frequencies up to 3kHz and suggests that spontaneous activity appears random on dot rasters but uniform on PST histograms.

Adaptation occurs when hair cells release many transmitters at stimulus onset, then reduce the spike rate to keep up with the stimulus, leading to fatigue and an eventual return to spontaneous rate.

Although a DC response is uniform, high-frequency tones show varying responses due to adaptation of hair cells releasing transmitters at different rates.

<p>Low-frequency tones below 3kHz show distinct peaks and valleys in the graph, with neurotransmitters released mainly at the peaks.</p> Signup and view all the answers

<p>An AC response from an 8kHz tone can be observed if the tail of a high-frequency tuning curve is seen below 3kHz.</p> Signup and view all the answers

<p>IHC exhibit a DC component because their average value is more positive than their open probability at resting potential.</p> Signup and view all the answers

<p>Humans have a max hearing freq limit because it takes time for ions to flow in slowly, causing a limit in the frequency that can be detected.</p> Signup and view all the answers

<p>IHC open probability at rest is 50% of the time, while OHC open probability at rest is 10% of the time.</p> Signup and view all the answers

<p>IHC can inform about higher frequency sounds due to their asymmetrical receptor potential, while OHC fail to detect anything above 3kHz.</p> Signup and view all the answers

<p>OHC fail to detect frequencies above 3kHz because the AC component cannot follow when the stimulus frequency is so fast.</p> Signup and view all the answers

<p>The asymmetrical receptor potential in inner hair cells (IHC) enables them to inform about higher frequency sounds.</p> Signup and view all the answers

<p>Half-wave rectification nonlinearity refers to the asymmetric behavior observed in the response of direct current (DC) in the auditory nerve.</p> Signup and view all the answers

<p>The membrane constant potential influences the responsiveness of hair cells to sound by affecting the speed at which ions flow in, limiting the frequency that can be detected.</p> Signup and view all the answers

<p>The characteristic frequency is the maximum frequency that can be detected by inner and outer hair cells, representing their optimal responsiveness.</p> Signup and view all the answers

<p>The higher open probability at rest of inner hair cells (IHC) allows them to detect a wider range of sound frequencies compared to outer hair cells (OHC).</p> Signup and view all the answers