Hypoalgesic effect of laser photobiostimulation shown by rat tail flick test.

@article{Ponnudurai1987HypoalgesicEO,
  title={Hypoalgesic effect of laser photobiostimulation shown by rat tail flick test.},
  author={Rex N Ponnudurai and Vlasta K. Zbuzek and Wen Hsien Wu},
  journal={Acupuncture & electro-therapeutics research},
  year={1987},
  volume={12 2},
  pages={93-100}
}
We demonstrated a 50% increase in pain threshold following laser photobiostimulation (LPBS), employing rat tail-flick test. Helium-neon laser (1 mW) of three different pulsing frequencies (4, 60, and 200 Hz) was applied on tail low resistance point for 15 seconds and tail-flick latencies were measured 30 minutes, 1 hour, 24 hours, 48 hours and 7 days later. LPBS of 4 Hz produced hypoalgesia of rapid onset and short duration while the response to 60 Hz was delayed and lasted longer. LPBS of 200… CONTINUE READING

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