EEG test
Electroencephalogram — a recording of brain waves

An EEG records the electrical activity of the brain through small sensors placed on the scalp. It helps doctors diagnose and manage epilepsy and other conditions that affect the brain. The test does not hurt, uses no radiation and is done in the neurology department at Charak Hospital, Hardoi Road, Lucknow.

Book an EEG Call 0522-666-4444
EEG on site Reported by the neurology team Children and adults MRI available for further tests

Ask about an EEG test

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Your details are used only to contact you about your appointment.

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About the test

What is an EEG?

Brain cells communicate through tiny electrical signals. An EEG picks up these signals with sensors (electrodes) on the scalp and shows them as wave patterns. Certain patterns help doctors understand seizures and other brain conditions.

  • Routine EEG takes about 30 to 60 minutes including set-up
  • The recording itself is around 20 to 40 minutes
  • Sometimes done after a night of reduced sleep (sleep-deprived EEG)
  • Flashing lights and deep breathing may be used during the test
  • Safe for children, adults and pregnant women

Safe

No needles, no radiation, no electric current into the body.

Quick

Usually done within an hour.

Child-friendly

A parent can stay with a young child.

Reported

Read by the neurology team.

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Why it is done

Why your doctor may advise an EEG

An EEG is usually advised along with a careful history and sometimes an MRI.

Seizures or fits

To support the diagnosis and type of epilepsy.

Blackouts or spells

When the cause of episodes is unclear.

Epilepsy follow-up

Before changing or stopping medicines.

Staring spells in children

To look for absence seizures.

Confusion or drowsiness

In some brain infections or metabolic problems.

In the ICU

To check brain activity in critically ill patients.

A normal EEG does not rule out epilepsy. The result is always read together with your symptoms and history. Call 0522-666-4444.

Preparation

How to prepare

Simple preparation helps get a good recording.

Wash your hair

The night before or on the day; do not use oil, gel or hair spray.

Take your medicines

Continue all medicines unless your doctor tells you otherwise.

Eat normally

Low blood sugar can affect the recording.

Sleep-deprived EEG

If asked, sleep less the night before as instructed; do not drive to the test.

Bring reports

Previous EEGs, MRI and a list of medicines.

On the day

What happens during the test

Here is what to expect.

Placing the sensors

A technician measures your head and places small sensors on the scalp with a paste. This takes about 15 to 20 minutes.

You sit or lie comfortablyEyes open and closed as askedStay still and relaxed

Activation

  • Deep breathing for a few minutes
  • Flashing lights at different speeds
  • These help show certain patterns

Tell the technician

  • If you feel a seizure starting
  • If you are uncomfortable
After the test

Understanding your result

General guidance — always follow the advice your own doctor gives you.

Normal EEG

A normal EEG is reassuring but does not exclude epilepsy. Your doctor may still start treatment based on your history.

Abnormal EEG

Some patterns support epilepsy; others are non-specific. Your neurologist will explain what your result means.

Repeat or longer tests

Sometimes a repeat EEG, a sleep-deprived EEG or a longer recording is advised.

Contact us urgently if

  • A seizure lasting more than 5 minutes
  • Repeated seizures without waking
  • Injury during a seizure
0522-666-4444
Neurology team

Doctors who advise and read EEGs

Neurosciences Epilepsy and seizures
Practical help

What to bring, costs & insurance

A little preparation helps us help you faster.

What to bring to your visit

Tick off as you pack:

  • Doctor’s prescription for the EEG
  • List of medicines
  • Previous EEG and MRI reports
  • Clean, oil-free hair

Costs & insurance

The cost depends on the type of EEG (routine or sleep-deprived) and whether it is done as an outpatient or during admission. Ask our team for the current charges.

  • ✓Written estimate— ask for one before planned procedures or admission.
  • ✓Health insurance & TPA— cashless treatment for admissions under tie-up insurers; outpatient visits depend on your policy.
  • ✓Ayushman Bharat (PM-JAY) accepted for eligible admissions.
  • ✓Corporate & PSU panels— ask whether your employer has a tie-up with Charak Hospital.

*Coverage depends on your policy and the treatment. Our insurance desk can check this for you.

Call 0522-666-4444
FAQs

Frequently asked questions

Does an EEG hurt?

No. The sensors only record signals; nothing is passed into the body.

How long does an EEG take?

About 30 to 60 minutes in total for a routine EEG.

Should I stop my epilepsy medicines before the test?

No, unless your neurologist specifically tells you to.

Can my child have an EEG?

Yes. EEG is safe at all ages. A parent can usually stay with the child.

When will I get the report?

Usually within a day or two. Your doctor will explain it.

Glossary

Words you may hear

ElectrodeA small sensor placed on the scalp.
Photic stimulationFlashing lights used during the EEG.
HyperventilationDeep, fast breathing used during the test.
Sleep-deprived EEGAn EEG done after reduced sleep to increase the chance of seeing changes.

No matching term. Please ask your doctor at your next visit.

Related pages

Related departments and guides

Neurosciences Epilepsy and seizures Stroke All tests and scans

Book an EEG

Bring your doctor’s prescription. Call 0522-666-4444 to schedule.

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Your details are used only to contact you about your appointment.

Medical information disclaimer: This page provides general health information for patients and families. It is not a substitute for a consultation, diagnosis or treatment by a qualified doctor. Treatment decisions depend on each patient's individual condition. In an emergency, call 0522-666-4444 or go to the nearest emergency department.

About this page: Prepared by the Charak Hospital web team with the help of AI writing tools, using information from the Institute of Neurosciences, Charak Hospital & Research Centre ·  Last updated: October 2026

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