[Observations of a histochemical nature on the walls of the cerebral arteries of human subjects of various ages].

It has been studied the mucopolysaccharides in some arteries of the circle of Willis in someone subjects from few months to 85 years. The mucopolysaccharides are localisated mainly in the intima and media tonaca and they tend to increase, quantitatively, until to 50 years; the mucopolysaccharides are in all the vasal layers, particularly in the membrane elastica interna and in the tonaca media placed shelter. These mucopolysaccharides tend to increase with aging.