Table 3.

Estimates for the AP output of a cortical column in response to a stimulation of the principal whisker

	APs/neuron						Number of excitatory cells	APs/column
	50 ms post-stimulus			100 ms post-stimulus				50 ms post-stimulus			100 ms post-stimulus
	Spontaneous	Evoked	Total	Spontaneous	Evoked	Total		Spontaneous	Evoked	Total	Spontaneous	Evoked	Total
L2/3	0.02	0.07	0.08	0.03	0.10	0.13	4908	78	329	407	155	504	660
L4	0.03	0.29	0.32	0.06	0.40	0.45	3780	107	1102	1208	214	1502	1715
L5A (slender-tufted)	0.05	0.03	0.09	0.11	0.15	0.26	1477	80	46	126	160	223	383
L5B (thick-tufted)	0.18	0.47	0.65	0.36	0.64	1.01	1900	347	896	1242	693	1225	1918
L6(A)	0.02	0.24	0.27	0.05	0.31	0.35	3218	75	783	858	150	987	1137
L2-L6A							15 283	686	3155	3841	1372	4441	5813

Notes: Number of APs per neuron generated in each of the excitatory cell types by stimulation of the principal whisker within the 50- and 100-ms post-stimulus interval from de Kock et al. (2007). Number of excitatory cells is estimated from the NeuN counts (see Table 1), corrected for an overall ratio of GABAergic INs of 15%.