Table 1.

Fast time constant of I_h at multiple membrane potentials

Holding (mV)	Mean (ms)	SEM (ms)	Dorsal (ms)	SEM (ms)	Ventral (ms)	SEM (ms)	Slope	Intercept	r	ρ	p
−40	211.94	46.96	158.39	58.27	265.49	71.16	56.61	−67.89	0.21	0.37	0.20
−45	284.3	47.73	255.35	74.31	313.25	62.27	284.30	15.04	0.14	0.33	0.14
−50	235.22	39.35	143.26	45.92	337.40	47.31	235.22	−242.12	0.39	0.51	0.02
−65	309.05	57.78	198.04	58.43	412.13	90.84	78.12	−82.43	0.16	0.22	0.28
−70	186.14	29.46	122.10	23.06	255.52	49.76	85.03	−235.96	0.35	0.48	0.03
−75	153.94	27.79	88.82	20.04	210.38	44.64	77.78	−237.48	0.30	0.41	0.03
−80	130.16	24.19	58.01	12.17	189.58	37.60	55.86	−150.95	0.25	0.42	0.02
−85	145.08	33.44	92.10	36.01	185.61	50.96	44.62	−78.92	0.14	0.29	0.12
−90	141.68	29.38	89.29	23.16	182.43	47.50	73.56	−230.51	0.27	0.23	0.21
−95	94.24	27.19	74.11	27.95	108.46	42.40	9.69	45.57	0.04	0.14	0.57
−100	104.08	30.72	58.10	17.64	143.94	54.05	89.46	−341.92	0.34	0.18	0.36
−105	105.12	30.09	56.21	12.95	144.87	52.14	79.50	−295.96	0.30	0.14	0.47
−110	92.00	29.56	45.74	10.83	134.69	54.27	70.33	−257.38	0.28	0.21	0.31

For each membrane voltage, the mean time constant of I_h for all cells, the mean time constant of I_h for dorsal cells (3.8–4.9 mm from the dorsal surface), the mean time constant of I_h for ventral cells (5.0–7.0 mm from the dorsal surface), the slope of the regression line, the intercept of the regression line, the r value, the ρ value determined from the Spearman's rank correlation coefficient, and the corresponding p value are shown.