Scientists can now move a mouse’s whiskers, ears, and a paw using just electrodes on the outside of the animal’s head. This new method can stimulate deep parts of the brain without surgery and — if it pans out in humans — it could be very helpful for people with neurological conditions like Parkinson’s, depression, or epilepsy.
The brain has surface regions located near the skull and deep regions further inside, such as the motor cortex, the area of the brain that controls movement. Until now, the only real way to stimulate the regions deeper inside the brain was to cut open the skull and directly implant electrodes. (This is called deep-brain stimulation.) But surgery can be dangerous and the electrodes can cause damage inside the...
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