Fig. 2.

Representative autoradiograms of D1, D2 and D4 receptor binding levels in coronal brain sections from adolescent male rats. Top row: D1 dopamine receptors labelled with [³H] SCH23390 at the level of CPu and NAc (A), GPi (B), and SN (C); non-specific [³H] SCH23390 binding (D). Bottom row: D2 dopamine receptors labelled with [³H] raclopride at the level of CPu and NAc (E); non-specific [³H] raclopride binding (F); D4 dopamine receptors labelled with [³H] YM-09151–2 at the level of CPu and NAc (G); non-specific [³H] YM-09151–2binding (H). The scale bar corresponds to 2 mm. CPu: caudate-putamen; NAc: nucleus accumbens; GPi: internal globus pallidus; SN: substantia nigra.