Interest in a detailed anatomical description our knowledge of the venous system has of the veins of the human brain is of fairly been advanced more by radiological than by recent date. The general layout of the dural anatomical methods. This is due to the diffi culty of obtaining a post-mortem display of sinuses and of the large encephalic veins the veins. Injection techniques often give de that drain into them has long been known, ceptive results; most authors use back-flow but a more detailed study of the venous sys tem has been made necessary by recent ad injection from the larger collecting veins, vances in neurosurgery and neuroradiology. but this method generally gives very incom plete results. The technique we have used is The progress and methods of neurora diology have made it possible to follow the radically different, consisting of an arterial superficial venous network further and injection of a solution of indian ink and gel further. There are obvious practical advan atine. When this injection is successful the tages in having a detailed knowledge of the arterial, capillary, and venous networks of venous network and these are not to be de the encephalon are clearly displayed; the re rived from a knowledge of the arterial net sults are particularly clear in the venous work: the venous network is in close con network which is visible from the main veins to their smallest branches.

I. Introduction

II. Material and Methods
1. Techniques of Removal
2. Injection Techniques
3. Observation Techniques
III.The Larger Superficial Veins of the Brain Stem and of the Base of the Brain
A. Infratentorial System
B. Supratentorial System
C. Anastomoses between the Supra-and Infratentorial Venous Systems
IV. Regional Architecture of the Superficial Veins
A. The Superficial Veins of the Medulla
B. The Superficial Veins of the Pons
C. The Superficial Veins of the Ventral Side of the Diencephalon
D. The Superficial Veins of the Mesencephalon
V. Conclusions
1. Intrinsic Anastomoses
2. Extrinsic Anastomoses
References
Illustrations.