Table 1.

Channel rate functions for model dIN neurons

Channel	Rate function	A (ms−1)	B (ms−1mV−1)	C	D (mV)	E (mV)
Ca	αm	4.05	0	1.0	−15.32	−13.57
	βm (V < −25 mV)	1.24	0.093	−1.0	10.63	1.0
	βm (V > −25 mV)	1.28	0	1.0	5.39	12.11
K fast	αn	5.06	0.0666	5.12	−18.396	−25.42
	βn	0.505	0	0	28.7	34.6
K slow	αn	0.462	8.204 × 10−3	4.59	−4.21	−11.97
	βn	0.0924	−1.353 × 10−3	1.615	2.1 × 105	3.33 × 105
Na	αm	8.67	0	1.0	−1.01	−12.56
	βm	3.82	0	1.0	9.01	9.69
	αh	0.08	0	0.0	38.88	26.0
	βh	4.08	0	1.0	−5.09	−10.21

The time constants and steady-state values of each channel's gates are dependent on membrane potential, according to functions α(V) and β(V) (see Eqs. 4 and 5). These functions are sigmoidal and their shape is determined by parameters A, B, C, D, and E.