Marino Andrew A, Nilsen Erik, Chesson Andrew L, Frilot Clifton
Department of Orthopaedic Surgery, Louisiana State University Health Sciences Center, P.O. Box 33932, Shreveport, LA 71130-3932, USA.
Clin Neurophysiol. 2004 May;115(5):1195-201. doi: 10.1016/j.clinph.2003.12.023.
To measure the response rate of normal human subjects to a low-strength, low-frequency magnetic field (MF), using nonlinear quantitative analysis of the electroencephalogram (EEG).
Eight subjects were exposed to a series of trials, each consisting of the application of the MF (1 G, 60 Hz) for 2 s followed by a field-free period of 5 s, and the EEG was analyzed statistically using phase-space methods to assess whether the subject detected the MF.
Each subject exhibited statistically significant changes in the EEG during presentation of the MF, as evidenced by increases in percent determinism and percent recurrence, two different measures of deterministic structure in the recorded signal, thereby indicating that the MF had been detected.
The 100% response rate manifested by the study group suggested that the ability to detect low-strength, low-frequency MFs is a common property of the human nervous system.
采用脑电图（EEG）的非线性定量分析方法，测量正常人类受试者对低强度、低频磁场（MF）的反应率。
八名受试者接受了一系列试验，每次试验包括施加MF（1高斯，60赫兹）2秒，随后是5秒的无磁场期，并使用相空间方法对EEG进行统计分析，以评估受试者是否检测到MF。
在MF呈现期间，每个受试者的EEG均表现出统计学上的显著变化，记录信号中确定性结构的两种不同测量指标——确定性百分比和重现百分比增加，这表明已检测到MF。
研究组表现出的100%反应率表明，检测低强度、低频MF的能力是人类神经系统的共同特性。
