Figure 1.

Typical recording sites in the (a) core or (b) dorsomedial shell part of the left nucleus accumbens (Nacc) (upper sections), and (c) typical injection sites in the left SUB (lower sections) of adult animals neonatally microinjected at PND8 with PBS (left column) or TTX (right column). The recording sites were visualized by means of electrocoagulation at the end of the experiment (arrows); sections were stained using Thionin Blue coloration. The center of the microinjection site in the left SUB (lower sections) was identified by means of Evans Blue track (arrows) and the sections were stained using Neutral Red coloration. Scale bar=1 mm. Cx: cortex, CC: corpus callosum; St.: striatum.