Regional distribution of acid phosphatase-positive axonal systems in the rat spinal cord and medulla, representing central terminals of cutaneous and visceral nociceptive neurons

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In addition to the substantia gelatinosa Rolandi, acid phosphatase active axonal systems are described (1) in the viscerosensory nucleus of the vagus nerve, (2) in Lissauer's band, (3) in the fasciculus cornus posterions (Cajal), and (4) in the nucleus basilaris externus (Cajal). Electron microscopically, acid phosphatase is located in between synaptic vesicles of axon terminals; the vesicle population of such terminals in the Rolando substance, however, markedly differs from that in systems 1-4, characterized by the presence of large dense-core vesicles. While acid phosphatase-active axon terminals in the Rolando substance appear to subserve cutaneous nociception, circumstantial evidence suggests participation of systems 1-4 in processing visceral nociception.

Original languageEnglish
Pages (from-to)227-234
Number of pages8
JournalJournal of neural transmission
Issue number3
Publication statusPublished - Sep 1 1977



  • Spinal cord
  • acid phosphatase
  • nociception (cutaneous and visceral)

ASJC Scopus subject areas

  • Neurology
  • Clinical Neurology
  • Psychiatry and Mental health
  • Biological Psychiatry

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