Non-Invasive Ultrasound Brain Interface Shows Promise for Parkinson’s Treatment | PolyU Research

An innovative, non-invasive approach to managing Parkinson’s disease is emerging from The Hong Kong Polytechnic University (PolyU). Researchers have developed an “All-Acoustics Brain-Computer Interface (BCI) System” that uses transcranial ultrasound to modulate brain activity, offering a potential new therapeutic avenue for those living with this debilitating neurodegenerative condition. The system, currently undergoing clinical research in collaboration with hospitals in Shanghai and Guangzhou, aims to alleviate motor symptoms without the risks associated with traditional surgical interventions.

Understanding Parkinson’s and the Need for New Therapies

Parkinson’s disease is a progressive disorder affecting the nervous system, primarily impacting movement. While medications and, in some cases, surgery can help manage symptoms, there remains a significant need for therapies that address the underlying neurological changes without the complications of invasive procedures. According to the Parkinson’s Foundation, nearly one million Americans will be living with Parkinson’s disease by 2020. https://www.parkinson.org/research/statistics The disease is characterized by a loss of dopamine-producing neurons in the brain, leading to tremors, rigidity, slow movement, and postural instability.

How the PolyU System Works: Beyond Traditional BCIs

The PolyU system, spearheaded by Prof. Sun Lei and his team, utilizes transcranial ultrasound neuromodulation. This technique employs focused ultrasound waves to precisely target deep brain regions. Unlike invasive BCI approaches that require implanting electrodes – carrying risks of infection and irreversible brain damage – and traditional non-invasive methods like electrical stimulation which struggle with depth and precision, the PolyU system aims for a balance of effectiveness and safety. The system features a helmet-shaped device with over 128 transducer elements, allowing for spatial resolution finer than 4mm. This level of precision is crucial for targeting specific brain areas responsible for motor control.

Professor Sun explains that the system “can communicate with the brain to modulate its functions…by utilising ultrasound to achieve non-invasive treatment for relieving Parkinsonian symptoms.” This modulation isn’t simply a broad stimulation; the team has also developed a “sonogenetics” technology to enhance specificity. This allows them to target and modulate specific cell types within the brain, a capability validated by multiple independent laboratories, according to PolyU.

Sonogenetics: A Key Advancement in Targeted Brain Modulation

The challenge in brain modulation lies in the brain’s complex cellular landscape. Different cell types are intermingled, making it difficult to selectively influence a specific population. Sonogenetics addresses this by enabling precise identification and modulation of targeted cells. This technology represents a significant step forward in the field, offering the potential to minimize off-target effects and maximize therapeutic benefit. Further research into sonogenetics and its applications is detailed in a recent review published in Frontiers in Rehabilitation Sciences. https://www.frontiersin.org/journals/rehabilitation-sciences/articles/10.3389/fresc.2026.1666530/full

Early Results and the Path to Clinical Validation

Initial studies, conducted on animal models, have shown promising results. Mice with Parkinson’s disease exhibited significant improvements in motor function after receiving ultrasound modulation. While the researchers acknowledge that Parkinson’s disease involves irreversible loss of brain cells, they believe that modulating the function of remaining cells can substantially alleviate symptoms.

The next phase involves expanding clinical validation. Prof. Sun plans to collaborate with five leading medical centers to conduct a study involving 100 Parkinson’s disease patients. This study will systematically assess the safety and efficacy of the ultrasound technique, a crucial step towards regulatory approval and eventual commercialization. The team also intends to explore the development of a more portable, home-based version of the system, potentially allowing patients to receive continuous treatment in their own environments.

Beyond Parkinson’s: Expanding the Therapeutic Horizon

The potential applications of this technology extend beyond Parkinson’s disease. The PolyU team is currently investigating transcranial ultrasound neuromodulation for the treatment of depression, weight control, and sleep regulation. This versatility highlights the broad potential of this non-invasive brain modulation technique. Brain-computer interfaces, including those utilizing ultrasound, are increasingly recognized as a key area of innovation in neurological treatment, as highlighted in a recent article in the International Journal of Surgery. https://pmc.ncbi.nlm.nih.gov/articles/PMC11392146/

National Significance and Future Outlook

The development of the All-Acoustics BCI System aligns with China’s strategic focus on brain-computer interfaces as a driver of economic growth, as outlined in the draft of the Nation’s 15th Five-Year Plan. PolyU’s Senior Vice President (Research and Innovation), Prof. Christopher Chao, emphasized the University’s commitment to translating impactful research into practical applications that benefit society. The research team has secured over HK$76 million in funding from sources including the Innovation and Technology Fund and the National Natural Science Foundation of China, and Prof. Sun has been recognized as a Senior Research Fellow by the Research Grants Council.

What’s Next for the All-Acoustics BCI System?

The coming years will be critical for the All-Acoustics BCI System. The planned clinical trials with 100 Parkinson’s patients will provide essential data on safety and efficacy. Successful completion of these trials will pave the way for regulatory submissions and potential commercialization. Simultaneously, the team will continue to refine the technology, exploring the development of a more portable system for home use and expanding its application to other neurological and psychiatric disorders. The ongoing research and development efforts promise to further unlock the potential of this innovative approach to brain modulation and improve the lives of individuals affected by a range of neurological conditions.