THE CEREBROSPINAL FLUID PATHWAYS (A Critical Note)

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Abstract
The pathways for the escape of the cerebrospinal fluid from the spinal cord are the perineurial spaces of the spinal roots, spinal ganglia and the postganglionic nerves. Such a view does not seem to be sustained by the method of injection of dyes into the subarachnoid space of humans. Such experiments (Somberg) demonstrated that methylene blue when injected extends only as far as the proximal end of the spinal ganglia. However, injn. of machine oil-K and similar substances discloses no obstacles to the free flow of the spinal fluid from the subarachnoid space of the spinal cord beyond the spinal ganglia. Injn. of methylene blue causes diffuse coloration of tissues and is not considered suitable for demonstrating pathways of any sort.

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