Figure 1From: Differential regulation of morphine antinociceptive effects by endogenous enkephalinergic system in the forebrain of miceComparison of the distributions and densities of immunoreactive enkephalin neurons and fibers in WT and KO mice. Low magnification photomicrography of coronal brain sections with immunostaining of enkephalinergic neurons and fibers in WT (A) and KO (B) mice. (C) – (N) show higher magnification photomicrography of immunostained brain regions of WT mice (C – H) and KO mice (I – N) enlarged from square areas indicated in A and B respectively. The brain regions magnified are: (C), (I) lateral globus pallidus, (D), (J) lateral septum, (E), (K) intermediated part of caudate putamen, (F), (L) amygdaloid nuclear region, (G), (M) cingulate cortex and (H), (N) sensory motor cortex.Back to article page