Researchers from the Korea Advanced Institute of Science and Technology (KAIST) have developed smartphone-controlled tiny soft brain implants that can be recharged wirelessly from outside the body. The implants can control brain circuits for a prolonged period without additional surgeries to replace the battery. This device is fitted with micrometer-sized LEDs mounted on ultrathin probes , made of ultra-soft, biocompatible polymers . It can easily manipulate target neurons in the deeper parts of the brain using light stimulation.

The device's previous version was a wireless head-mounted neural device, which could supply multiple drugs and light stimulation by using smartphones. Researchers have devised a fully implantable, optical-electronic system that can be completely operated using smartphones in the latest version. Pros and Cons of the previous brain implant system Wireless…