[The emissaries of the human skull (author's transl)].

The range of hemodynamic conductivity of the venous outlets of the skull, called emissary veins, and factors influencing them have been explored in 888 closed and 210 opened human skulls: Exept the condylar canal and the mastoid emissary vein only emissary veins joined to cranial nerves are of importance. The straighter the connection to the heart the wider the related emisary vein tends to be, which explains the predominance of the right emissary veins in the occipital cranial fossa. The right and the left jugular vein as well as the jugular and the mastoid emissary vein compensate each other. The influence of constitutional factors is shown by the sex difference in the conductivity of the jugular veins corresponding to the sex difference of the mean cerebral weight.