Fig. 7

The “Ising Neural Machine”. The equivalent single compartment circuit containing two stochastic elements called “Ising Neural Machines”, respectively for the Na⁺channels and for the K⁺channel s[1]. By “inside” and “outside” is meant inside and outside the nerve cell membrane. The specific capacity of the membrane is indicated as c_m while i_L, g_L and E_L indicate respectively the “leakage current ”[2] per unit area, the leakage conductance and potential. The currents leaving the two Ising machines are total currents (per unit area)