[Mechanisms of the effect of substances in the cerebrospinal fluid from the central canal of the spinal cord on hemodynamics].

The electron microscopy revealed morphological structures of the central spinal channel's wall capable of mediating physiological responses to administration of physiologically active substances in the CSF. The supraependymal dendrite terminals, the inter- and subependymal dendrites as well as chemoreceptors of subsynaptic membranes of the neuropil's axo-dendritic synapses are able to perform the receptor functions. The physiologically active substances of CSF can penetrate into the spinal cord and reach the receptor structures through the interependymal junctions and long basal branches of the ependyma cells.