Table 1.

Intervals between boutons (mean ± SEM) in different layers of the posterior piriform cortex and subjacent endopiriform nucleus (En) derived by random sampling of sections from five intracellularly injected superficial pyramidal cells

Layer	n	Mean
Ib	255	10.06 ± 0.60
II	228	9.86 ± 0.52
IIIs	294	10.92 ± 0.52
IIId	200	14.38 ± 0.89^1-160
En	425	12.84 ± 0.67^*

↵F1-160 Significantly greater than for layers Ib, II, and IIIs, p < 0.01 for each;
↵* significantly greater than layers Ib and II, p < 0.02 for each, Tukey's HSD test.