Table 1.

Details of the stereologic counting procedure used to evaluate total neuron numbers in the hippocampus. Obj., objective used; B and H, base and height of the unbiased virtual counting frames; Dx and Dy, distance between the unbiased virtual counting frames in orthogonal directions x and y; t, measured actual average section thickness after histologic processing; Σ CS, average sum of unbiased virtual counting frames used; Σ Q⁻, average number of counted neurons; CE, average predicted coefficient of error of the estimated total neuron numbers (according to [26]). DG, granule cells in the dentate gyrus; CA3, pyramidal cells in the CA3; CA1–2, pyramidal cells in the CA1–2.

	Obj.	B [µm2]	H [µm]	Dx [µm]	Dy [µm]	t [µm]	Σ CS	Σ Q−	CE
DG	100×	400	4	120	120	8.2	147	843	0.034
CA3	100×	400	4	60	60	8	360	748	0.036
CA1–2	100×	400	4	75	75	7.9	319	937	0.033