Figure 7.

Testing “Uniform Random Draw with Replacement” in LEC. Revisiting the nature of neurons being utilized redundantly across environments, layer II LEC neurons were quantified in terms of their observed vs. expected distribution of active cells. (A) When the analysis encompassed all layer II LEC neurons, the expected activation outweighed the observed, suggesting that more LEC neurons are activated during both epochs of exploration than what is expected by chance. (B) Restricting the analysis to the LEC→CA3 projection neurons, however, demonstrates the opposite effect. The observed % of active neurons outweighs the expected, suggesting a dissimilar pattern across environments beyond what has normally been explained as “chance.”