Chinese researchers have created soft, flexible brain implants inspired by Japanese kirigami paper-cutting art. These stretchable microelectrode arrays move with brain tissue and can record signals from hundreds of neurons at once. The study, published on February 5, showed the arrays working in macaque monkeys, whose brains resemble human brains. Traditional microelectrodes struggle with brain movement, causing parts to shift and lose accuracy. For example, Neuralink's first human brain implant had 85% of flexible electrode threads pull out a month after surgery, a major setback. The Chinese team pointed out that such thread movement can harm delicate brain tissue and lower recording precision. Their new spiral-shaped electrodes stretch and flex better than normal linear ones. They used a hydrogel coating on the brain surface to reduce friction during implantation. A shuttle device inserted these spiral threads into the brain to a depth of 2mm, leaving their bases free to float with brain movements. "We show that the implanted array can provide simultaneous activity recordings from over 700 cortical neurons in a macaque monkey brain," the researchers said. Multiple spiral threads covered a larger brain area, enabling dense neuronal recordings. This approach could enhance brain-computer interfaces, which link brain activity to computers for tasks like controlling robotic limbs. The research offers hope for more reliable, long-term neural implants that work seamlessly with the moving brain.