“Right now, the market for devices that can read brain activity and translate it into actions is in its infancy. But, thanks in part to Elon Musk’s startup Neuralink, which is developing implantable brain-computer interfaces—or BCIs—that can record data from thousands of brain cells, investment and interest in these devices have soared in recent years.

New wearable devices designed to provide feedback during day-to-day activities build on implantable BCIs used for medical interventions, as well as decades of research into how the brain works. Efforts on implantable devices focus on restoring function. Applications aimed to allow communication and movement have been in development for decades to help paralyzed patients, and researchers have made major leaps with implantable devices in recent years, including giving voice back to the voiceless.”

From Wall Street Journal.