Sodium channels in the axolemma of unmyelinated axons: a new estimate

R. G. Pellegrino, P. S. Spencer, J. M. Ritchie

Research output: Contribution to journalArticle

23 Scopus citations


The saturable uptake of tritium-labeled saxitoxin by the rat left cervical sympathetic trunk, which consists almost entirely of unmyelinated fibers, indicates that the density of sodium channels on the axolemma of these fibers is about 200 channels/μm2.

Original languageEnglish (US)
Pages (from-to)357-360
Number of pages4
JournalBrain research
Issue number2
StatePublished - Jul 9 1984



  • excitable tissue
  • mammalian cervical sympathetic trunk
  • saxitoxin binding
  • sodium channels
  • ultrastructure
  • unmyelinated axons

ASJC Scopus subject areas

  • Neuroscience(all)
  • Molecular Biology
  • Clinical Neurology
  • Developmental Biology

Cite this