Figure 7.

Postsynaptic targets of hippocampal terminations in the upper and deep layers of A25. (A) Proportion of hippocampal boutons that formed synapses with three categories of postsynaptic targets (on spine, Sp; on dendritic shaft, Den; or on more than one spine, on >1 Sp). Upper layers, circles; deep layers, crosses. (B) Plots show the proportion of hippocampal terminations apposed on one of three neurochemical classes of inhibitory neurons labeled with calcium-binding proteins in A25; *, statistically significant comparisons. (C) Plots show the proportion of hippocampal axon boutons that formed synapses on postsynaptic elements labeled with calcium-binding proteins in A25. In B and C, layers were collapsed. Error bars: ±SE.