The results show that compared with the scalp surface ERP data, the current source intensity derived from tomography can better reflect the enhanced effect of P1 and N1, especially N1.

结果表明，层析得到的电源强度与头表的脑电数据相比，能更好地反映注意导致的P 1、N1相对增强效应，其中尤以N1的增强比较明显。

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This works by deploying an array ofelectrodes over a person's scalp and recording surface manifestationsof the electrical activity going on under his skull.

这种技术通过在人的头皮上放置一系列电极从而记录头颅内的电活动。

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Prof Christopher James, an expert in neural engineering at the University of Warwick, who uses non-invasive techniques in his own research, explains that it is currently not possible to put information into a brain using just the surface of the scalp.

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When using the NovoTTF-100A System, a health care professional places electrodes on the surface of the patient's scalp to deliver low-intensity, changing electrical fields called "tumor treatment fields" (TTFs) to the tumor site.

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Under anesthesia, an incision is made in the scalp, a hole is drilled in the skull, and the device is placed on the surface of the brain.

WSJ: Bionic Brains and Beyond