An electroencephalogram or EEG is used to record electrical activity of the brain. As the cells in the brain employ electrical impulses to communicate with one another, recording the electrical activity of the brain helps understand any abnormalities present. Doctors attach small flat metal discs to the scalp and then electrodes measure the electrical impulses helping doctors assess any abnormal patterns. These abnormalities indicate possible seizures or other brain disorders.

In most cases, an EEG is performed to detect internal injuries, brain tumors, sleep disorders, dementia, possible strokes, memory problems, inflammation of the brain and to determine electrical activity in a comatose patient.

To prepare for an EEG, follow these guidelines:

  • Wash hair a day prior to the scan and refrain from hair gels, sprays.
  • Avoid food & caffeine 8 hours prior to the scan.