Diagnosing Childhood Epilepsy with an Electroencephalogram EEG (Electroencephalography)

Childhood epilepsy is a serious neurological condition that requires close parental vigilance. If your child shows signs such as muscle stiffness, jerking, startle responses, staring spells, appearing dazed, or sitting unresponsive, and especially if they have had a seizure during a high fever, you should bring them for an appropriate diagnostic evaluation. Timely treatment can prevent progression to generalized convulsions and the risk of brain hypoxia.

For parents who suspect their child may be at risk of epilepsy, assessment by an experienced medical team is essential. This includes a detailed medical history and additional tests such as an electroencephalogram (Electroencephalography: EEG), radiologic studies (CT, MRI), or genetic testing to confirm and determine the cause of epilepsy—guiding the most appropriate treatment plan.

What is an EEG Test (Electroencephalography)?

EEG or Electroencephalography is a test that measures the brain’s electrical activity and must be performed by trained clinicians. EEG is primarily used to evaluate brain function in patients with suspected epilepsy, loss of consciousness, lethargy, confusion, or unresponsiveness—potentially caused by conditions such as epilepsy or brain tumors. Early detection of abnormalities enables timely treatment.

EEG testing steps

The EEG process is straightforward and usually quick. In general, it involves the following steps:

Electrode placement (Electrodes)

A specialist places electrodes on your child’s scalp. These electrodes are connected to a device that records electrical signals.

Begin recording

After the electrodes are in place, the clinician starts recording the brain’s electrical activity. During the test, your child may cry or feel uneasy; the medical team will help calm them or facilitate sleep.

Result analysis

When the recording is complete, the electrical signals—displayed as graphs—are analyzed. A specialist interprets the results to diagnose the condition and set a treatment plan or follow-up.

Preparing your child before an EEG

If you plan to bring your child for an EEG, preparation helps the procedure go smoothly and improves accuracy. Please follow these recommendations:

• Shampoo thoroughly

Before the appointment, wash your child’s hair with water and shampoo. Avoid conditioner, hair spray, or styling mousse, as they can interfere with electrode adhesion.

• Eat and take regular medications

Your child should eat as usual. In some cases, the doctor may advise pausing anti-seizure medication before the EEG; always confirm detailed instructions with your physician beforehand.

• Arrive early

Please arrive at the hospital about 30 minutes before the scheduled time to allow your child to settle and acclimate to the environment.

• Avoid letting your child sleep before the test

For young children, clinicians often aim to record during sleep, sometimes using sedatives. Bring comforting items—such as a milk bottle, blanket, or favorite toy—to help your child relax and fall asleep. Avoid naps right before the visit to increase the chance they fall asleep naturally during the test, possibly without needing sedatives.

Benefits of an EEG (EEG Test)

• Improves diagnostic accuracy for epilepsy

EEG helps physicians diagnose epilepsy more accurately than relying on symptoms alone.

• Enables an appropriate treatment plan

EEG results help identify the cause and severity of epilepsy, informing a tailored treatment strategy.

• Monitors treatment response

For children with a history of seizures, EEG can be used to monitor treatment effectiveness and assess response to medications or other therapies.

If you suspect your child may have pediatric epilepsy, consider an EEG test at Synphaet Serirak Hospital with pediatric specialists in childhood epilepsy for prompt, appropriate treatment.