Applying high-frequency electrical noise to the brain can boost maths skills up to six months later, say Oxford University researchers. A small study in Current Biology suggests the brain stimulation technique makes neurons function more efficiently.
It could help those suffering with neurodegenerative illness, stroke or learning difficulties. An expert said the technique could have "real, applied impact."
Transcranial random noise stimulation (TRNS) involves applying random electrical noise to targeted areas of the brain by placing electrodes on the surface of the scalp.
It is a relatively new method of brain stimulation which is painless and non-invasive.