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Related Experiment Videos

[Pain and its main transmitters].

J Costentin1

  • 1Unité de Neuropsychopharmacologie Expérimentale, ESA 6036 CNRS, Institut Fédératif de Recherches Multidisciplinaires sur les Peptides=IFR 23, Faculté de Médecine et Pharmacie, 22, bd Gambetta, F 76000 Rouen.

Annales Pharmaceutiques Francaises
|May 3, 2000
PubMed
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Pain signals begin in the body and travel to the brain, involving numerous neurotransmitters. The brain modulates these signals through complex pathways, influencing pain perception.

Area of Science:

  • Neuroscience
  • Pain research
  • Neurophysiology

Context:

  • Pain perception involves peripheral nociceptor stimulation and central nervous system processing.
  • A variety of endogenous substances modulate pain signal transmission.
  • The 'gate control' theory describes modulation at the spinal cord level.

Purpose:

  • To elucidate the complex neurochemical pathways involved in pain signal transmission and modulation.
  • To detail the roles of various neurotransmitters and neuromodulators in pain perception.
  • To explain the mechanisms underlying pain signal amplification and reduction in the central nervous system.

Summary:

  • Peripheral stimuli activate nociceptors, releasing neurotransmitters like substance P in the dorsal horn.
  • Presynaptic receptors modulated by interneurons and descending pathways (e.g., enkephalins, dopamine) regulate neurotransmitter release.

Related Experiment Videos

  • Ascending pathways are influenced by both pain-enhancing (e.g., nociceptin) and pain-reducing (e.g., endorphins, anandamide) substances.

    • Impact:

    • Provides a comprehensive overview of the neurobiology of pain.
    • Highlights potential targets for novel pain management therapies.
    • Enhances understanding of how the brain processes and regulates pain signals.