Langevin approach with rescaled noise for stochastic channel dynamics in Hodgkin–Huxley neurons
Huang Yan-Dong, Li Xiang, Shuai Jian-Wei†
       
Closing probability of ion channels. The probabilities (a) P ( n 1 n 2 n 3 n 4 = 0) and (b) P ( m 1 m 2 m 3 h = 0) that all K+ and Na+ channels are closed against N .