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Related Experiment Videos

[Changes in pain sensitivity under increased atmospheric pressure].

Iu D Ignatov, A A Miasnikov, Iu N Vasil'ev

    Biulleten' Eksperimental'Noi Biologii I Meditsiny
    |July 1, 1992
    PubMed
    Summary

    Increased air pressure induces significant pain relief (analgesia) in rats and humans. This hyperbaric analgesia effect is dose-dependent and involves neurochemical pathways, with nitrogen potentially playing a key role.

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    Area of Science:

    • Physiology
    • Pharmacology
    • Environmental Medicine

    Context:

    • Hyperbaric environments can influence physiological responses.
    • Understanding pain modulation mechanisms is crucial for therapeutic applications.

    Purpose:

    • To investigate the analgesic effects of increased air pressure (hyperbaric air) in rats and humans.
    • To explore the neurochemical underpinnings of hyperbaric analgesia.

    Summary:

    • Elevated air pressure from 0.1 to 1.1 MPa progressively increased analgesia in rats, with peak effects at 0.7-1.1 MPa.
    • Heliox at increased pressure also induced analgesia, though less potent than air.
    • In humans, hyperbaric air (0.4-0.7 MPa) significantly raised pain thresholds to mechanical stimulation.
    • Pretreatment with various antagonists (naloxone, atropine, yohimbine, parachloramphetamine, prasosin) reduced hyperbaric analgesia in rats, suggesting involvement of opioid, cholinergic, and adrenergic systems.

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  • The study discusses the role of increased partial pressure of nitrogen and potential neurochemical mechanisms in hyperbaric analgesia.

    • Impact:

    • Provides evidence for hyperbaric air as a potential analgesic modality.
    • Highlights the complex neurochemical pathways involved in pressure-induced pain relief.
    • Suggests further research into nitrogen's role and therapeutic applications of hyperbaric conditions.