Brain-Computer Interfaces: Technology Reaches New Heights
Photo: MIT Technology Review
Quick answer
Brain-computer interfaces (BCI) are advancing rapidly: China approved the first medical BCI device in 2024, and clinical trials have expanded significantly.
Brain-computer interfaces (BCIs) are emerging as one of the fastest-growing fields in medical technology. In 2024, China became the first country to approve a BCI for clinical use, marking the transition from research labs to real-world applications. The number of volunteers participating in trials has surged in recent years, with engineers continuously refining solutions for brain signal decoding.
BCIs vary in type and functionality. For instance, devices with implanted electrodes deliver high-precision signals but require complex surgical procedures. Non-invasive alternatives, such as electrode caps, are easier to use but offer lower data transmission quality. In some cases, BCIs connect to computers via head-mounted ports, as seen in systems designed for patients with amyotrophic lateral sclerosis (ALS).
Today, BCIs primarily assist patients who have lost mobility or speech. For example, individuals with spinal cord injuries can use interfaces to control wheelchairs or robotic prosthetics. In 2024, researchers from the University of Houston published a review of BCI clinical trials from 1998 to 2023, documenting 21 research groups testing the technology on 67 volunteers. As the field evolves, BCIs promise new rehabilitation opportunities and improved quality of life.
Common questions
- What are brain-computer interfaces (BCI)?
- BCIs are technologies that read brain signals and convert them into commands to control external devices. They are used in medicine to assist patients with paralysis or neurodegenerative diseases.
- What types of BCIs exist?
- There are invasive (implanted electrodes), semi-invasive (surface electrodes), and non-invasive (external devices like electrode caps) BCIs. Closer electrode proximity to neurons improves signal accuracy but increases complication risks.
- What challenges do BCIs address today?
- BCIs help paralyzed patients control prosthetics, computers, or synthesize speech. The technology is also being tested for motor function restoration and improving quality of life in neurodegenerative diseases.
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