Confusional states in acute disease.

position of such nutrient arteries is reasonably predictable. On the nerve a series of epineural vessels is formed, whose branches pass into the perineurium and, finally, there is produced within the fasciculi a longitudinally disposed capillary plexus which is continuous throughout the length of the nerve and is not dominated by local nutrient vessels. Experimental. The intraneural plexus forms a system which is normally reinforced by the local nutrient arteries, but which can function adequately in a given length of nerve even when the local branches are ligated. Obliteration of epineural or intraneural vessels produces degeneration of varying degree depending on the extent of vascular deprivation. The complete and intact system of vessels upon and more particularly within the nerve is functionally more important than any localized group of nutrient vessels.