Sugishita M, Takayama Y
Department of Rehabilitation, Tokyo Metropolitan Institute for Neuroscience, Japan.
Neuroreport. 1993 May;4(5):569-70. doi: 10.1097/00001756-199305000-00027.
Repetitive transcranial magnetic stimulation of short duration (0.3 or 0.6 s, 20 Hz) evoked paraesthesia similar to that caused by repetitive electrical stimulation. Since the points eliciting the paraesthesia were approximately 2 cm posterior from those eliciting motor responses, the paraesthesia stemmed from direct excitation of the post-central gyrus. The paraesthesia showed somatotopical representation: the point eliciting the paraesthesia in the leg was separated from the point eliciting the paraesthesia in the hand 2.9 cm medially in one subject, and 1 cm posteriorly and 1 cm medially in the other subject. Repetitive transcranial magnetic stimulation provides a painless, noninvasive method for mapping cortical sensory representation in humans.
短时长（0.3或0.6秒，20赫兹）的重复经颅磁刺激诱发的感觉异常类似于重复电刺激所引起的感觉异常。由于诱发感觉异常的点比诱发运动反应的点大约靠后2厘米，因此感觉异常源于中央后回的直接兴奋。感觉异常呈现躯体定位表征：在一名受试者中，诱发腿部感觉异常的点与诱发手部感觉异常的点在内侧相距2.9厘米，在另一名受试者中则在后方1厘米且内侧1厘米处。重复经颅磁刺激为绘制人类大脑皮质感觉表征提供了一种无痛、非侵入性的方法。
