updating trials

susceptibility1.tex

@@ -442,7 +442,7 @@ Theoretical work on leaky integrate-and-fire and conductance-based models sugges
 
 \begin{figure*}[t]
   \includegraphics[width=\columnwidth]{nonlin_regime.pdf}
-  \caption{\label{fig:nonlin_regime} The model used has the identifier 2013-01-08-aa.\fone{} is 30\,Hz and \ftwo{} is 130\, Hz, that is eqaul to \fbase{}.}
+  \caption{\label{fig:nonlin_regime} The model used has the identifier 2013-01-08-aa.\fone{} is 30\,Hz and \ftwo{} is 130\, Hz, that is eqaul to \fbase{}. Both contrasts increase equally in strength.}
 \end{figure*}
 
 Without any external stimulation, a P-unit fires action potentials at a spontaneous baseline rate \fbase{} to the fish's own EOD of frequency \feod{}. Accordingly, a peak at \fbase{} is present in the power spectrum of this baseline activity (\subfigrefb{fig:motivation}{A}). Superposition of the receiver's EOD with an EOD of another fish with frequency $f_1$ results in a beat, a periodic amplitude modulation of the receiver's EOD. The frequency of the beat is given by the difference frequency $\Delta f_1 = f_1 - \feod$ between the two fish. P-units encode this beat in their firing rate \citep{Bastian1981a,Barayeu2023} and consequently a peak at this beat frequency appears the the power spectrum of the response (\subfigrefb{fig:motivation}{B}). A second peak at the first harmonic indicates a nonlinear response that here is easily identified by the clipping of the P-unit's firing rate at zero. Pairing the fish with another fish with a higher beat frequency $\Delta f_2 = f_2 - \feod$ results in a weaker response with a single peak in the response power spectrum (\subfigrefb{fig:motivation}{C}). Note that $\Delta f_2$ has been choosen to match the P-unit's baseline  firing rate.