Author response image 1. (A) Kinetics of the ChR2 current at different LI. All cases shows an initial peak which decays to the steady-state and when the light turns off decays to the baseline. (B) Time evolution of the voltage distribution along the illumination pattern with an exponential decay in a quiescent domain with the LI of 0.07 mW/mm². (C) Spatial derivative of V (dV/dx) along the illumination pattern with an exponential decay at different times, for the same illumination as in (A).