Table 3.

Characteristics of bursting and regular spiking neurons in the subiculum, CA1, CA3, and dentate gyrus in epileptic pilocarpine-treated rats

	Long-average firing rate (Hz)	Non-theta firing rate (Hz)	Theta firing rate (Hz)	Burst index	Symmetry index	Spike amplitude (μV)	Spike width (ms)
Subiculum
Bursting, n = 58	0.89 ± 0.11	0.88 ± 0.11	1.43 ± 0.19*	0.7 ± 0.03	2.0 ± 0.1	150 ± 8	0.26 ± 0.01
	0.02–3.24	0.02–3.23	0.03–6.03	0.2–1.0	1.1–3.4	82–352	0.15–0.46
Regular spiking, n = 32	2.35 ± 0.14**	2.34 ± 0.14	3.66 ± 0.27*	−0.4 ± 0.04	2.1 ± 0.1	169 ± 13	0.23 ± 0.01
	0.44–3.80	0.44–3.85	0.72–6.27	−0.8 to −0.1	1.7–2.7	86–363	0.15–0.43
CA1
Bursting, n = 70	0.40 ± 0.06	0.40 ± 0.06	0.58 ± 0.08*	0.9 ± 0.01	2.0 ± 0.04	189 ± 10	0.24 ± 0.01
	0.04–3.18	0.04–3.17	0.00–3.89	0.6–1.0	1.4–3.0	66–565	0.15–0.36
Regular spiking, n = 5	1.81 ± 0.63	1.80 ± 0.62	2.12 ± 0.92	−0.4 ± 0.1	2.3 ± 0.1	240 ± 55	0.25 ± 0.03
	0.33–3.50	0.34–3.49	0–4.60	−0.7 to −0.2	1.8–2.5	103–403	0.15–0.30
CA3
Bursting, n = 54	0.32 ± 0.03	0.33 ± 0.03	0.13 ± 0.02*	0.9 ± 0.01	2.3 ± 0.1	173 ± 12	0.24 ± 0.01
	0.02–0.86	0.09–0.87	0–0.78	0.8–1.0	1.7–3.1	61–495	0.15–0.30
Regular spiking, n = 1	0.09	0.08	0.44	−0.4	1.5	265	0.21
Dentate gyrus
Bursting, n = 38	0.49 ± 0.10	0.49 ± 0.10	0.47 ± 0.12	0.6 ± 0.04	2.5 ± 0.1	121 ± 9	0.22 ± 0.01
	0.04–3.04	0.04–3.05	0–3.49	0.1–1.0	1.5–5.2	71–340	0.15–0.30
Regular spiking, n = 14	0.96 ± 0.17**	0.95 ± 0.17	2.96 ± 0.68*	−0.5 ± 0.1	2.3 ± 0.3	121 ± 12	0.24 ± 0.01
	0.08–2.04	0.08–2.04	0.30–8.44	−0.9 to −0.04	1.2–4.4	77–230	0.18–0.30

Values indicate mean ± SEM and range.

*Theta versus non-theta firing rate (p < 0.01, paired t test or Wilcoxon's signed-rank test).

**Comparison of long-average firing rate of regular spiking versus bursting neurons within each subregion (p < 0.01, Mann–Whitney rank-sum test).