Brenner D, Lipton J, Kaufman L, Williamson S J
Department of Physics, New York University, New York, NY 10003, USA.
Science. 1978 Jan 6;199(4324):81-3. doi: 10.1126/science.199.4324.81.
The human brain is found to produce a magnetic field near the scalp which varies in synchrony with periodic electrical stimulation applied to a finger. Use of a highly sensitive superconducting quantum interference device as a magnetic field detector reveals that the brain's field is sharply localized over the primary projection area of the sensory cortex contralateral to the digit being stimulated. The phase of the response at the stimulus frequency varies monotonically with the repetition rate and at intermediate frequencies yields a latency of approximately 70 milliseconds for cortical response.
人们发现，人类大脑在头皮附近会产生一个磁场，该磁场与施加在手指上的周期性电刺激同步变化。使用高灵敏度超导量子干涉装置作为磁场探测器发现，大脑的磁场在与被刺激手指对侧的感觉皮层的主要投射区域上高度局限。刺激频率下反应的相位随重复率单调变化，在中间频率时，皮层反应的潜伏期约为70毫秒。
