Scientists Use Nanoparticles to Remote Control Brains of Mice

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Scientists at the Institute for Basic Science (IBS) in South Korea have developed an innovative technique to control the minds of mice. By manipulating nanoparticle-activated “switches” inside their brains with an external magnetic field, researchers can now influence specific behaviors with remarkable precision.

How Nano-MIND Works

The system, called Nano-MIND (Magnetogenetic Interface for NeuroDynamics), activates targeted neural circuits in chosen brain regions. Unlike earlier mind-control experiments in animals, which typically required invasive surgery and bulky equipment that restricted movement, Nano-MIND operates remotely and allows subjects full freedom of motion.

“This is the world’s first technology to freely control specific brain regions using magnetic fields,” said Jinwoo Cheon, director of the IBS Center for Nanomedicine and senior author of a new paper published in the journal Nature Nanotechnology. “We expect it to be widely used in research to understand brain functions, sophisticated artificial neural networks, two-way brain-computer interface technologies, and new treatments for neurological disorders.”

Key Experiments and Findings

In one set of experiments, researchers activated inhibitory neurons in specific brain areas, resulting in a 100 percent increase in appetite and feeding behaviors. Conversely, exciting these neurons reduced food intake by 50 percent.

In another trial, the team selectively stimulated receptors linked to maternal behaviors in female mice that had never reproduced. Activation of these pathways led to a significant rise in nurturing actions, such as gathering pups into the nest—behaviors typically seen only in mothers.

A third experiment focused on social behavior. By targeting brain regions responsible for friendliness, the scientists encouraged previously unfamiliar mice to interact positively when placed together in a small chamber.

Mechanism and Future Potential

The researchers achieved these effects by magnetically twisting a tiny actuator that pulls or pushes nanoparticles implanted in the mice’s brains. This non-invasive approach could pave the way for nanotechnology-based therapies for neurological conditions in humans, including potential treatments for depression.

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