史密斯夫妇

Chinese scientists develop electrode coating to address signal loss and tissue adhesion problems in long-term brain-computer interface implantation_我的网站

A |     (ECNS) -- In Zhejiang, artificial intelligence is moving from laboratories into everyday care, offering practical support to people with disabilities, older adults and patients.    At a rehabilitation center in Hangzhou’s Yuhang District, nine-year-old Xiaoyu, who developed cerebral palsy after being born prematurely, is learning to walk with the help of a robotic exoskeleton. Powered by an AI algorithm, the device adjusts training programs to patients’ movements and medical conditions. More than 5,000 people have received free rehabilitation through the center’s public welfare program, which aims to narrow the gap in access to professional therapists.    AI is also bringing companionship to elderly care. At a smart nursing home in Hangzhou, emotional-support robots chat with residents and tell jokes, while intelligent wheelchairs can fetch objects, press elevator buttons and provide transportation. Other robots monitor vital signs and conduct routine rounds, easing caregivers’ workload.    In the healthcare sector, Zhejiang Province has developed a provincewide shared medical AI agent named “An Zhen’er.” It provides the public with over 40 intelligent medical and health services, including smart navigation for hospital visits, accompanied patient guidance during appointments, AIpowered interpretation of medical reports, and more. The system handles more than 1 million service requests per day.    (By Intern Lin Qiaochu, Zhang Dongfang)                    。    

    Photo: VCG
Chinese researchers have developed a multifunctional electrode coating that addresses key challenges in long-term brain-computer interface (BCI) implantation, including signal loss and tissue adhesion, bringing BCI one step closer to clinical application, the Global Times learned from the research team behind the findings on Sunday. 
As an emerging field combining neuroscience and artificial intelligence (AI), BCI faces a major challenge of ensuring long-term compatibility between electrodes and brain tissue. Previous clinical trials showed that immune responses could cause implanted electrodes to retract after just three months, severely reducing signal quality and the number of available channels. 
This problem stems from chronic inflammation triggered by implants, which creates insulating scar tissue around electrodes and separates them from neurons. Irreversible adhesion between electrodes and brain tissue after long-term implantation also makes device removal risky, potentially causing brain injury during follow-up surgeries.
Experiments showed that flexible neural electrodes coated with this material could operate stably in the brain for more than 300 days and could be safely removed without causing damage. This means the universal coating technology can make electrodes not only operate stably over the long term but can also be safely removed and replaced after aging, paving the way for long-term BCI applications.
Developed by the research team led by Zhang Wei at the Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, associated with Beijing Tiantan Hospital, Shanghai Institute of Microsystem and Information Technology and NeuroXess, a high-tech life science company specializing in BCI technologies, the cationic alternating peptide electrode coating preserves electrode flexibility and conductivity, while offering antibacterial, anti-protein adsorption and immune-rejection-inhibiting functions. 
A 300-day animal study showed the coating's effectiveness. Bare electrodes experienced a sharp loss of recording capability after 90 days of implantation and could barely detect neuronal signals after 300 days. In contrast, coated electrodes maintained stable recording channels and consistently captured neural signals above 155 microvolts. 
In terms of neural modulation, after 300 days of implantation, conventional electrodes required a current of 100 microamps to induce weak limb responses, while coated electrodes triggered clear movements with only 2 microamps, improving modulation efficiency by 50 times. 
Notably, the removal tests highlighted a key advantage of the coating that electrodes no longer form irreversible bonds with brain tissue. In the experiments, the coated electrodes were removed intact, with minimal damage to the surrounding brain tissue, Zhang told the Global Times on Sunday.
。

Current article:http://89089l3.mengruanpianchengji.cyou/qk6/20260826/4064.html

Published on:20:03:17