高功率毫米波辐照大鼠失能效应的脑电观察

使用高功率8毫米波辐照清醒的大鼠,同时测量其脑电图。用小波进行多分辨分析,将脑电信号分解成各个节律信号,分析其变化。辐照时,大鼠出现了非节律性的高幅δ波,而且在慢波中夹杂着癫痫样放电,这说明大鼠在受到辐照时产生高度节律紊乱,提示了其受到强烈刺激而进入失能状态。大鼠受到辐照时失能期为辐照第(1.3±0.5)s到(17.2±2.3)s,辐照于30 s时结束,第(62.7±2.6)s时,其脑电图开始恢复。结果表明:大鼠受到高功率毫米波辐照时最佳失能发生在表皮温升较快、表皮损伤较轻的时候,过长时间的辐照不会延长其失能时间,反而会导致其损伤加大。因此,应用高功率毫米波的失能效应时须控制一定剂量。

Electroencephalogram in disabled effect of rat irradiated by high power millimeter wave

The electroencephalogram (EEG) in rat was measured when the rat was irradiated by high power 35 GHz millimeter wave. By wavelet multi-resolution analysis, the EEG was decomposed into several rhythms to analyze its change. During irradiation, there were non rhythmic δ waves with high amplitude in EEG and epileptic discharges in slow wave, which suggested that it came about highly disordered rhythm in the EEG and it entered into incapacitating state induced by strong stimulation. The incapacitating period was from (1.3±0.5) s to (17.2±2.3) s. When the irradiation ended at 30 s, the rat EEG began recovering at (62.7±2.6) s. These results demonstrated that the best incapacitating period was when the rat cuticle temperature rose more quickly and its injury was milder during high power mill