The effect of constant magnetic field on the formalin-induced pain in mice

Magnetic field (MF) has had many therapeutic usages in traditional medicine. Today, it is used to accelerate the recovery period after surgical operations by some medical centers and in some horse-training farms in the world. There are some scientific reports on the alternative effect of MF on nervous system function, convulsion, pain, neurons, embryonic cells and immune system cells. For this reason, the effect of constant MF on formalin-induced pain was investigated in the present project. For this purpose, two magnets (80 and 120 militesla (mt) at 15 centimeter distance from each other) were used. It was 4 mt in the middle of 30 cm distance between two magnets when they were opposed to each other by different poles. These three MF powers were used to perform the tests. Tests were designed in two categories; i.e. acute and chronic. In the acute experiment, formalin test (FT) was performed in three groups (n = 6) during exposure MF power. In the chronic case, groups (n = 9) were exposed to MF for two hours a day for 10 days and then FT was performed. Results of the acute tests showed additive effect of MF on pain sensation, as MF with 80 mt and 120 mt powers had 15.5 % and 19.5% additive effects (P