Unmyelinated sensory and preganglionic fibers in rat L6 and S1 ventral spinal roots

Richard E. Coggeshall, Christine W. Maynard, Lauren A. Langford

Research output: Contribution to journalArticlepeer-review

31 Scopus citations


Approximately 30% of the axons in the L6 and S1 ventral roots in the rat are unmyelinated. Appropriate surgical procedures show that 30% of these unmyelinated axons arise from dorsal root ganglion cells and are therefore presumably sensory. Thus approximately 10% of the total number of axons in these ventral roots are sensory. The other 70% of the unmyelinated axons come from the spinal cord and are therefore presumably preganglionic parasympathetic fibers. Thus approximately 20% of the axons in these ventral roots are unmyelinated preganglionic fibers. The implications of these findings are discussed.

Original languageEnglish (US)
Pages (from-to)41-47
Number of pages7
JournalJournal of Comparative Neurology
Issue number1
StatePublished - Sep 1 1980

ASJC Scopus subject areas

  • Neuroscience(all)


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