Relationship between the number of PV immunoreactive neurons in different regions of hippocampus (A—CA1, B—CA2/3, C—DG) and the cumulative duration in the centre zone observed in the OF test (n = 8 per group).

<p>Simple regression analysis indicated that the number of PV neurons in CA1 (F = 10.946, df = 1, Pearson's r = 0.52, p = 0.002) and DG (F = 12.715, df = 1, Pearson's r = 0.55, p = 0.001) was positively correlated with time spent in centre zone. There was no significant correlation for CA2/3 region (F = 0.674, df = 1, Pearson's r = 0.15, p = 0.42).