Leaky Integrate-and-Fire Neuron

τ_m (ms) 20 ms V_rest (mV) -65 mV V_thresh (mV) -50 mV V_reset (mV) -70 mV Refr. period (ms) 2 ms

I_dc (pA) 200 pA I_noise σ (pA) 50 pA R_m (GΩ) 1.0 GΩ

Firing rate—

CV ISI—

Last ISI—

Spike count0

LIF equation:

τ_m dV/dt = -(V-V_rest) + R_m·I(t)

Threshold: V ≥ V_th → spike, V→V_reset

Theory F-I curve (no noise):

f = 1/(τ_m·ln((R_m·I−V_rest)/(R_m·I−V_th)) + t_ref)⁻¹

Blue: V(t) trace
Red marks: spike times
Yellow: threshold