Studying deep brain tissues noninvasively is difficult. Now scientists have developed a way to send light deep into the brain without invasive optical fibers. The method uses infrared light outside the head to activate upconversion nanoparticles (UCNPs). When these nanoparticles absorb near-infrared laser light, they emit visible photons to deep areas in the brain, allowing remote optogenetic stimulation or inhibition of neurons in the brain.
from Top Health News -- ScienceDaily http://ift.tt/2C7t6Va
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