The Morphology and Distribution of Serotonin-Like Immunoreactive Fibers in the Cat Dorsal Column Nuclei

John C. Pearson, Melvyn D. Goldfinger

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Abstract

Fibers showing serotonin-like immunoreactivity (5-HT-LI) are demonstrated in the gracile, cuneate and external cuneate nuclei of the cat using avidin-biotinylated horseradish peroxidase and indirect fluorescence immunohistochemical methods. 5-HT-LI fibers are located in all cytoarchitectural subdivisions of the gracile and cuneate nuclei but are restricted to the medial half of the external cuneate nucleus. In all nuclei, 5-HT-LI fibers consist of long, varicose strands showing a wide range in the diameters of both varicosities and intervaricose segments. Results support the concept that serotonergic systems may be involved in the processing of non-noxious somatosensory submodalities.

Original languageAmerican English
JournalNeuroscience Letters
Volume74
DOIs
StatePublished - Feb 24 1987

Keywords

  • Immunoreactivity
  • Nucleus cuneatus
  • Nucleus gracilis
  • External cuneate nucleus
  • Cat

Disciplines

  • Medical Cell Biology
  • Medical Neurobiology
  • Medical Physiology
  • Medical Sciences
  • Medicine and Health Sciences
  • Neurosciences
  • Physiological Processes

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