Table 9.

Number of excitatory (asymmetrical) and inhibitory (symmetrical) synapses in areas generating or not generating SPA

		Excitatory synapses		Inhibitory synapses		All synapses
Sample	Examined area (μm2)	Number (% of total)	Number per 100 μm2	Number (% of total)	Number per 100 μm2	Number	Number per 100 μm2	Ratio of excitatory/inhibitory synapses
Epileptic SPA	2904	199 (49.4 ± 5.3%)	7.3 ± 2.2	204 (50.6 ± 5.3%)	7.3 ± 1.9	403	14.6 ± 3.9	0.99 ± 0.21
Epileptic No SPA	2232	165 (46.2 ± 9.2%)	7.4 ± 2.6	189 (53.8 ± 9.2%)	8.4 ± 2.2	354	15.8 ± 4.1	0.89 ± 0.31
Tumour SPA	3393	149 (37.8 ± 7.7%)	4.3 ± 1.5	233 (62.2 ± 7.7%)	6.8 ± 0.7	382	11.1 ± 2.0	0.62 ± 0.19
Tumour No SPA	2751	112 (38.0 ± 5.2%)	4.0 ± 0.7	185 (62.0 ± 5.2%)	6.6 ± 1.6	297	10.7 ± 2.0	0.62 ± 0.14