The Journal of experimental medicine
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1. The Wallerian degeneration occurring in peripheral nerves by incubation in Ringer solution and serum does not occur in plasma. 2. Peripheral nerves incubated in plasma give rise to no growth. ⋯ In no case was growth of axis cylinders observed. 5. The growth of the syncytium of Schwann from degenerating nerves affords a basis for an anatomical conception of the centrifugal orientation of growing axis cylinders in regeneration. 6. Morphologically there is a striking resemblance between the syncytium of Schwann and neuroglia growing in plasma.