The prepared nerve ring was placed in an acrylic resin cell containing 2 ml of physiological solution and was attached to the wax foundation with cactaceous thorns.
Additional info
In control experiments, the solution was heated by 2°C with a rate of 0.96°C/s corresponding to an SAR of 4030 W/kg.
The findings indicate that millimeter waveexposure at the power used in treatment can activate thermoreceptors and other temperature-sensitive nerve endings located in superficial skin layers. On normal physiological conditions, the BP-4 neuron fires with a steady frequency. After starting irradiation, the firing rate decreased. With increasing SAR, this effect also increased (e.g. stronger decrease of the firing rate). Under prolonged exposure, after starting the irradiation, the firing rate decreased (in proportion to SAR) and then gradually increased to the level exceeding the initial value of the firing rate. After the completion of exposure at first, the firing rate increased and the gradually decreased towards the new level approximate to the initial value of the firing rate. The effects observed at the same SAR did not depend on the frequency.
