Table 1. Subthreshold electrophysiological properties of layer 5 pyramidal neurons.

	All cells	Regular firing	Burst firing	Weak burst firing	Strong burst firing
Number of cells	61	26 (43 %)	35 (57 %)	9 (14 %)	26 (43 %)
Membrane potential (mV)	−63.4 ± 0.4	−63.2 ± 0.6	−63.5 ± 0.52	−65.2 ± 1.1	−62.9 ± 0.5
	−63	−63	−64	−66	−63
Minimum 3rd quadrant	21.1 ± 1.2	24.4 ± 2.1	18.5 ± 1.3*	24.6 ± 3.2	16.3 ± 0.9†‡
peak slope resistance (MΩ)	17.6	22.2	16.6	24.1	15.8
Maximum 3rd quadrant	28.2 ± 1.7	34.6 ± 3.1	23.2 ± 1.5*	29.8 ± 2.45	21.0 ± 1.6 ‡
peak slope resistance (MΩ)	25.5	31.1	20.6	30.0	18.8
Minimum 3rd quadrant steady-state slope	17.0 ± 1.1	19.7 ± 1.8	15.0 ± 1.2	20.8 ± 3.6	12.8 ± 0.8†‡
resistance (MΩ)	15.3	18.3	3.9	19.3	12.6
Maximum 3rd quadrant steady-state slope	21.2 ± 1.4	26.1 ± 2.6	17.5 ± 1.2*	22.82 ± 2.0	15.8 ± 1.3‡
resistance (MΩ)	18.98	24.5	16.1	22.4	13.6
Minimum 1st quadrant	46.2 ± 4.4	61.1 ± 9.2	36.3 ± 3.1*	49.7 ± 5.2	31.3 ± 3.3†‡
peak slope resistance (MΩ)	38.9	54.0	31.8	47.1	27.6
1st quadrant steady-state	32.2 ± 2.4	41.2 ± 3.9	26.4 ± 2.5*	38.1 ± 4.1	22.1 ± 2.6†‡
slope resistance (MΩ)	28.58	39.8	22.5	37.3	17.9
Subthreshold transient	4.3 ± 0.2	3.6 ± 0.3	4.75 ± 0.3	2.9 ± 0.3	5.3 ± 0.3†‡
depolarising potential (mV)	4.3	3.3	4.8	2.7	5.5

Numerical values are given as means ±s.e.m. (top line) and median (lower line).

^*Significant difference between burst and regular firing cells (ANOVA).

^†Significant difference between weak burst and strong burst firing cells (ANOVA).

^‡Significant difference between regular and strong burst firing cells (ANOVA).