Fig. 12.

Examples of the three different categories of neurons obtained from the factorial analysis of odor and delay length.A, An entorhinal cell that displayed odor-selective activity at the end of the memory delay that was unaffected by the length of the delay (main effect of odor:F_(7,221) = 9.34; p < 0.01). B, An entorhinal cell that was selectively active for one particular odor at the end of the 3 sec delay but not at the end of the 30 sec delay (main effect of odor:F_(7,272) = 4.10, p < 0.01; odor × delay interaction:F_(7,272) = 3.72, p < 0.01). C, A perirhinal cell that fired more at the end of 3 sec delays, but whose activity did not differ significantly across the odor set (main effect of delay: F_(1,326)= 5.59; p < 0.05).