Fig. 5.
A schematic to explain the competing effects of duration and timing of postnatal manipulation on performance in spatial/relational memory tasks is presented. Performance on these tasks is enhanced (+) when the duration of the manipulation is short (<1-hr). But, as the duration increases (≤1-hr), performance on the task is impaired (−). When the manipulation is not imposed during postnatal week 3, performance is impaired (−). But, performance is enhanced (+) if the timing of the manipulation includes postnatal week 3.