|Zapping the brain
By sending a short, strong magnetic pulse through its coil, this TMS machine affects the electrical activity of the brain. TMS can either activate a part of the brain or knock it out momentarily, depending on the pulse's frequency.
Scientists can use different-shaped coils to produce magnetic fields with different effects. A figure-of-eight shape produces a more concentrated effect to target a specific area, while a saddle shape can reach deeper into the brain.
|These two images show a TMS machine and a range of coils used to stimulate the brain.|
Science Museum/Jennie Hills