FIGURE 3. Immunocytochemical staining for Fos-immunoreactive proteins. A 
section through the head of the right caudate-putamen from a 
saline-injected rat shows the weak staining of striatal neuronal 
nuclei for Fos immunoreactivity. A small amount of lateral 
ventricle is seen in the upper left. At this dilution of antiserum 
(1:10, 000) control sections were generally blank except for 
scattered darkly stained neurons in pyriform cortex and olfactory 
tubercle. (64X magnification) 
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