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December 1944

RELATION OF CIRCULUS ARTERIOSUS TO HYPOTHALAMUS AND INTERNAL CAPSULE

Arch NeurPsych. 1944;52(6):526-530. doi:10.1001/archneurpsyc.1944.02290360098009
Abstract

In studies bearing on the blood supply of the brain, a number of authors have recently stressed the contributions of the circulus arteriosus to the hypothalamus.1 In the present study, when the branches of the circulus were traced out (fig. 1), it was observed that many of them sent terminals into the depths of the brain to supply various areas of the internal capsule (fig. 2). This communication deals with several interesting observation made in the course of this study.

My method of approach in dissection of these arteries consisted in identifying a certain vessel of the circulus, following a particular twig peripherally until it disappeared within the brain substance and then, by carefully scraping away the overlying tissue, tracing the vessel to its termination.

It was found that fixed brains were better suited for this purpose than fresh brains since the brain substance was more crumbly, and therefore

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