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- T I Kanui.
- Brain Res. 1987 Jan 27;402(1):160-3.
AbstractExtracellular and intracellular recordings were made from within the dorsal horn of 10 anaesthetised and gallamine triethiodide-paralysed cats. Inhibition of background and residual noxious-evoked discharge by cooling and warming was demonstrated in 7 out of 33 nociceptor-driven dorsal horn neurones. Five units were inhibited by warming of the noxious mechanical excitatory receptive field. Four units were inhibited by 100%. One unit was inhibited by 42%. Cold stimulation inhibited two units. The background and residual noxious evoked discharge was inhibited by 100%. Cooling (32-20 degrees C) excited two units; warming (32-43 degrees C) also excited two units. Heating above 43 degrees C excited 8 units; cold below 20 degrees C excited 3 units. The units inhibited by thermal stimulation may provide some neuronal basis for thermal analgesia.
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