Abstract
By following up the change by time in the radioactivity of RIHSA injected into the lateral ventricle, the cisterna magna and the lumbar subarachnoid space of normal dogs, and making similar measurements with a model of such CSF spaces, for better determination of the influence of osmotic diffusion, it was confirmed that streams of CSF flowed at least from the ventricle to the cisterna magna and thence to the cerebral surface. No proof, however, could be obtained on the existence of any such stream in the spinal subarachnoid space.
