What is neuroimaging? Sometimes epilepsy is caused by abnormalities in the structure of the brain. These can be such things as too much spinal fluid (hydrocephalus), scar tissue, or a tangle of blood vessels (vascular malformation)....

MEG (magnetoencephalography) provides a new noninvasive tool to study epilepsy and brain function. When it is combined with structural imaging, it is known as magnetic source imaging (MSI). MEG measures small electrical currents...