In cases of severe epilepsy, a hemispherectomy sometimes is the last resort. But if the location of those “electrical storms” could be more precisely located, taking out an entire hemisphere of the brain would not be necessary.  As this piece describes: “Researchers at Aalto University in Finland have developed the world’s first device designed for mapping the human brain that combines whole-head magnetoencephalography (MEG) and magnetic resonance imaging (MRI) technology. MEG measures the electrical function and MRI visualizes the structure of the brain. The merging of these two technologies will produce unprecedented accuracy in locating brain electrical activity non-invasively.”  MORE