This tiny implant, smaller than a grain of salt, can read your brain

Cornell University researchers have developed a neural implant smaller than a grain of salt that can wirelessly transmit brain activity data for over a year using red and infrared laser beams. The microscale device, called MOTE, uses light pulses to encode and send electrical brain signals through a semiconductor diode made from aluminum gallium arsenide. This breakthrough could enable brain monitoring during MRI scans and opens possibilities for new medical applications in spinal cord monitoring and other body sensors.