An EEG test records the brain’s electrical signals using small electrodes placed on the scalp.

• The brain cells (neurons) communicate through tiny electrical impulses.
• The EEG captures these impulses and displays them as wave patterns.
• Abnormal patterns may indicate neurological conditions.

Doctors recommend EEG for a variety of conditions, including:

• Epilepsy & Seizure Disorders – EEG is the gold standard for detecting abnormal brain activity linked to seizures.
• Sleep Disorders – Helps diagnose insomnia, sleep apnea, and narcolepsy.
• Head Injuries – Detects changes in brain activity after trauma.
• Brain Tumors & Infections – Identifies unusual brain wave patterns.
• Alzheimer’s & Dementia – Assists in studying memory-related disorders.
• Unexplained Symptoms – Such as fainting, confusion, or sudden behavioral changes.

📊 According to studies, EEG detects epilepsy in over 50% of patients after their first seizure.

The EEG procedure is simple and usually takes 20–40 minutes (longer for sleep studies).

Step-by-step procedure:

1. Preparation: Electrodes (small metal discs) are attached to your scalp with adhesive or a cap.
2. Recording: You’ll sit or lie down while the machine records your brain waves.
3. Activities: You may be asked to breathe deeply, look at flashing lights, or even try to sleep.
4. Analysis: The results are shown as wave patterns—spikes or abnormal rhythms may indicate brain disorders.

Not all EEGs are the same. Depending on the condition, doctors may recommend:

• Routine EEG – Short recording while you’re awake.
• Ambulatory EEG – Portable device records brain activity for 1–3 days.
• Sleep EEG – Done while you sleep to detect nighttime brain activity.
• Video EEG – Records both your behavior and brain activity at the same time.