Figure 8.

Proportions of synaptic shapes in the stratum radiatum of the rat CA1 in the saline and cocaine-SA groups. (A) Examples of the different types of synapses based on the shape of the synaptic junction: macular, horseshoe-shaped (HS), perforated, and fragmented. We also refer to nonmacular synapses as synapses with complex shapes. The upper and lower rows show examples of shapes of AS and SS synapses, respectively. (B, C) Percentages of the different types of synaptic shapes within the population of AS and SS in the saline (B) and the cocaine-SA (C) group. SA: self-administration.