Summary
Neuromodulation has the potential to map neural functions; enhance our perceptual, motor, and cognitive capabilities; and restore sensory and motor functions lost through injury or disease. Despite several decades of research and development, state-of-the-art noninvasive neuromodulation techniques still suffer from poor spatial resolution (more than several millimeters), while implantable electrical and optical methods with finer spatial resolution only provide a limited coverage of hundreds to thousands of neurons through extremely invasive parenchymal implantation. These limitations are fund