Magnetoencephalogram (MEG) is a technique that measures the magnetic activity of the brain. There are several synonyms for this specialized term used in neurology. One of the synonyms is "magnetic brainwave imaging" as it detects the magnetic field generated by the action potential of the brain cells. Another term is "magnetic source imaging" as the magnetic fields generated by neurons are used to identify the precise location of brain activity. The abbreviation "MEG" itself is also used as a synonym. Finally, "magnetic neuroimaging" is another term used to describe MEG as it is used to visualize the structure and function of the brain via magnetically measuring its activity.