Figure 5. Firing rate response to a step-like current signal at time .
in a population of independent threshold neurons. (A,B) Firing rate change 
in response to a mean current step-like increase of amplitude 
, amplitude-to-threshold ratio 
. Analytical solution in Eq. 25 (solid lines) and simulation results (circles) are superimposed. (A) 
for 
, 
and varying current correlation times 
. (B) 
for 
, 
and 
. (C,D) Firing rate change 
in response to an step-like increase of the current variance 
. (C) 
and 
, 
. (D) 
for 
, 
and 
. Analytical solution in Eq. 26 (solid lines) and simulation results (circles) are superimposed. Note that the evoked change of the stationary firing rate in A and C, B and D is the same.