noun. An x-ray picture of the brain taken by encephalography.

noun. An electroencephalogram.

noun. A magnetoencephalogram.

noun. An image of the brain obtained by encephalography

noun. an X ray of the brain made by replacing spinal fluid with a gas (usually oxygen) to improve contrast

noun. a graphical record of electrical activity of the brain; produced by an electroencephalograph

"Brain wave activity is measured by an encephalogram which is a valuable instrument to measure brain wave activity in c.p.s., cycles per second."

electroencephalogram  

X-ray  graph  graphical record  roentgenogram  x-ray photograph