Key facts
- Researchers have developed a new brain implant electrode array.
- The array is thinner than a strand of hair and as soft as brain tissue.
- It demonstrated unprecedented long-term clarity in recording neural activity during animal trials.
- The implant remained safely functional for 18 months in animal trials.
- This development overcomes the challenge of stiff electrodes causing inflammation and scar tissue in the brain.
A team of scientists, led by researchers in China, has engineered a novel brain implant electrode array designed to overcome a significant hurdle in brain-computer interface technology. The new array is exceptionally thin, measuring less than a strand of hair, and possesses a softness comparable to brain tissue. This flexibility and durability were demonstrated in animal trials, where the implant successfully recorded neural activity with exceptional long-term clarity and remained functional for 18 months. Current invasive brain-computer interfaces often use stiffer materials like platinum or platinum-iridium alloys, which, despite good conductivity, create a friction mismatch with the brain's soft tissue. This friction can lead to chronic inflammation and scar tissue formation over time, degrading signal quality. The new flexible array aims to mitigate these issues, offering a more stable and effective solution for long-term neural monitoring.