Figure 5. Firing rate adaptation to changes in input variance.
(A) Top: Noisy input current with two standard deviations: 
6+
nA, 
= 1 or 2 nA. Bottom: The firing rate to noisy input current calculated from 100 trials, 
. (B) Top: Time varying noisy input current. 
5+
nA, 
= 1, 4, 2, 1, 2, 1, 4 and 2 nA, consecutively, and the noise 
is filtered with an alpha function 
with 
ms. Bottom: Instantaneous firing rate in response to the input current for 
(blue) and 
(black). For both 
ms and 
ms.