Abstract
The cerebral dural sinuses of 215 specimens of dura obtained at autopsy were studied and diagrammed. Particular attention was accorded the anatomic arrangement of the major sinuses that converge to form the torcular. In 57 per cent of the specimens there was free communication between the superior sagittal, the straight, the occipital, and the transverse sinuses at the torcular. In 43 per cent there was maldevelopment of one or more of these major sinuses at or near the torcular. Consideration is given to the clinical import of these variations subsequent to ablation of a part or all of the jugular venous system in the neck.
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