The possible analgesic effect of soft-laser irradiation on heat nociceptors in the cat tongue

Arch Oral Biol. 1988;33(9):693-4. doi: 10.1016/0003-9969(88)90125-2.


These effects were studied by recording single-fibre discharges in the lingual nerve. A total of 11 heat nociceptors were tested and of these 60 per cent decreased their firing frequency following soft-laser (GaA1As semiconductor laser) irradiation for 1 min; firing frequency was decreased in all the nociceptors studied following irradiation for 3 to 10 min. The reduction in firing rate was similar between 5 and 10 min after irradiation suggesting the effect reached a plateau within this time. These findings suggest that soft-laser irradiation might have an analgesic effect on tongue pain.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Action Potentials
  • Analgesia / methods*
  • Animals
  • Cats
  • Hot Temperature
  • Lasers*
  • Lingual Nerve / physiology
  • Nociceptors / physiology
  • Nociceptors / radiation effects*
  • Tongue / innervation*