Abstract
Neurotechniques Current techniques to stimulate regions inside the brain need a permanently implanted wire or an optical fiber. Working in mice, Chen et al. developed a method to overcome this problem (see the Perspective by Temel and Jahanshahi). They introduced heat-sensitive capsaicin receptors into nerve cells and then injected magnetic nanoparticles into specific brain regions. The nanoparticles could be heated by external alternating magnetic fields, which activated the ion channel–expressing neurons. Thus, cellular signaling deep inside the brain can be controlled remotely without permanent implants. Science , this issue p. [1477][1]; see also p. [1418][2] [1]: /lookup/doi/10.1126/science.1261821 [2]: /lookup/doi/10.1126/science.aaa9610
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