Abstract
Plasma cholesterol was labeled in rats by ingestion of ( 14C)-cholesterol for 8 or 60 days. It was then possible to determine autoradiographically the anatomical localization of labeled cholesterol in the brain and the spinal cord. Besides a generalized low labeling of nervous tissue, the labeled cholesterol transferred from plasma was deposited in areas of the myelinated nerve fibers. The blackening of autoradiographic pictures was deepest where the density of the myelinated fibers was greatest.
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