Novel technique could transform the treatment landscape for brain disorders

NewsGuard 100/100 Score

The human brain's adaptability to internal and external changes, known as neural plasticity, forms the foundation for understanding cognitive functions like memory and learning, as well as various neurological disorders. New research conducted by a team led by Dr. PARK Joo Min of the Center for Cognition and Sociality within the Institute for Basic Science (IBS) unveils a novel technique that could transform the treatment landscape for brain disorders. The team developed a non-invasive brain stimulation method called Patterned Low-Intensity Low-Frequency Ultrasound (LILFUS), which holds tremendous potential for inducing long-lasting changes in brain function.

Traditionally, magnetic and electrical brain stimulation methods have been used to modulate brain function. However, these methods come with inherent limitations that restrict their spatial resolution and penetration depth, making it challenging to precisely stimulate specific brain regions with optimal efficacy. More invasive methods, such as those that require surgical procedures, exhibit superior control and therapeutic effects for specific deep brain stimulation, but they come with risks such as tissue damage, inflammation, and infection. These limitations have fueled the search for alternative approaches that can overcome these constraints and provide more efficient and precise modulation of brain function.

In the latest study unveiled by the IBS, researchers used ultrasound to enable precise stimulation of specific brain areas. Unlike electromagnetic waves, ultrasound has the advantage of being able to penetrate deep into the brain tissues. The researchers discovered that ultrasound stimulation can modulate neural plasticity - the brain's ability to rewire itself - through the activation of key molecular pathways. Specifically, the study pinpointed the ultrasound's effect on mechanosensitive calcium channels in astrocytes, which controls the cells' ability to uptake calcium and release neurotransmitters.

LILFUS was designed based on specific ultrasound parameters that mimic the brainwave patterns of theta (5 Hz) and gamma (30 Hz) oscillations observed during learning and memory processes. The new tool allowed the researchers to either activate or deactivate specific brain regions at will - intermittent delivery of the ultrasound was found to induce long-term potentiation effects, while continuous patterns resulted in long-term depression effects.

One of the most promising aspects of this new technology is its ability to facilitate the acquisition of new motor skills. When the researchers delivered ultrasound stimulation to the cerebral motor cortex in mice, they observed significant improvements in motor skill learning and the ability to retrieve food. Interestingly, researchers were even able to change the forelimb preference of the mice. This suggests potential applications in rehabilitation therapies for stroke survivors and individuals with motor impairments.

The implications of this research extend far beyond motor function. It may be used to treat conditions such as depression, where altered brain excitability and plasticity are prominent features. With further exploration, LILFUS could be adapted for various brain stimulation protocols, offering hope for various conditions ranging from sensory impairments to cognitive disorders.

This study has not only developed a new and safe neural regulation technology with long-lasting effects but has also uncovered the molecular mechanism changes involved in brainwave-patterned ultrasound neural regulation. We plan to continue follow-up studies to apply this technology for the treatment of brain disorders related to abnormal brain excitation and inhibition and for the enhancement of cognitive functions."

Dr. Park Joo Min of the Center for Cognition and Sociality, Institute for Basic Science

Source:
Journal reference:

Kim, H-J., et al. (2024) Long-lasting forms of plasticity through patterned ultrasound-induced brainwave entrainment. Science Advances. doi.org/10.1126/sciadv.adk3198.

Comments

The opinions expressed here are the views of the writer and do not necessarily reflect the views and opinions of News Medical.
Post a new comment
Post

While we only use edited and approved content for Azthena answers, it may on occasions provide incorrect responses. Please confirm any data provided with the related suppliers or authors. We do not provide medical advice, if you search for medical information you must always consult a medical professional before acting on any information provided.

Your questions, but not your email details will be shared with OpenAI and retained for 30 days in accordance with their privacy principles.

Please do not ask questions that use sensitive or confidential information.

Read the full Terms & Conditions.

You might also like...
“Zombie neurons” shed light on the cerebellum's critical teaching signals