Abstract
The histochemical distribution of succinic dehydrogenase in the guinea pig's cerebral cortex is compared with the cytoarchitectonics in restained sections. The cytoarchitectonic subdivision of the cortex is paralleled by gradations of enzymic activity which can be substantiated by densitometric measurements. The typical histochemical patterns of several representative regions are described. The histochemical pattern of succinic dehydrogenase may be regarded as a parameter of the general oxidative metabolic rate of a region. A more detailed comparison of chemoarchitectonics and cytoarchitectonics shows that there is no correlation of cell density and enzymic activity since the nerve cell's maximal enzyme supply can be found either in the pericaryon or in the dendrites. These patterns of enzymic distribution are typical for the various laminae of the cortex.
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