Electroencephalogram (EEG)

An Electroencephalogram (EEG) is a non-invasive, painless diagnostic test that records the electrical activity of the brain. The brain communicates through tiny electrical impulses produced by neurons, and an EEG captures these signals using electrodes placed on the scalp.

Purpose of the EEG Test

• Detect abnormal brain activity
• Diagnose epilepsy and seizure disorders
• Evaluate unexplained loss of consciousness or fainting
• Assess sleep disorders
• Investigate brain infections or inflammation
• Monitor brain function after head injury or stroke
• Evaluate developmental delays in children
• Confirm brain death in critical care settings

Preparation Before EEG Test

• Wash hair and avoid oils or gels
• Eat normally before the test
• Avoid caffeine 6–8 hours before EEG
• Follow sleep deprivation instructions if advised
• Continue medications unless instructed otherwise