THE RELATIONS OF THE INTRACRANIAL PRESSURES

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Abstract
In the horizontal ether-ized dog, abrupt alterations in the pressure within the subarachnoid space were without effect upon the sagittal venous pressure, but pressure-changes within the cerebral veins caused pressure-changes within the cerebrospinal fluid. On tilting from the horizontal to the two vertical positions, the pressure-alterations in the sagittal sinus remained constant even when the pressure-changes in the cerebrospinal fluid were of different magnitudes. A relationship between the volume of cerebrospinal fluid dislocated and the pressure-changes was shown. An interpretation of the type of pressure-equilibrium between cerebral veins and cerebrospinal fluid is given.

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