Neurology diagnoses and treats disorders of the nervous system, including the brain, spinal cord, and nerves, as well as thought and memory.
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Diagnosing epilepsy in a child is a meticulous investigative process. It begins with a detailed clinical history, often relying on smartphone videos provided by parents. The goal is not only to confirm that the events are seizures but also to classify the syndrome accurately to guide prognosis and treatment.
The EEG is the gold standard for diagnosis. It records the electrical activity of the brain using electrodes placed on the scalp. In children, the EEG background changes with age, so interpretation requires a specialist familiar with pediatric patterns. The test looks for “interictal discharges”—spikes or sharp waves that occur between seizures.
Long term video EEG monitoring is often necessary when routine studies are normal or when the diagnosis is unclear. This involves admitting the child to the hospital for several days to capture a seizure on video while simultaneously recording the brain waves. This is crucial for surgical planning and differentiating seizures from other conditions.
Magnetic Resonance Imaging (MRI) is the imaging modality of choice for pediatric epilepsy. Unlike CT scans, MRI provides high resolution detail of the brain’s structure, allowing radiologists to see subtle malformations of cortical development that are common causes of childhood seizures.
In cases where the MRI is normal but focal epilepsy is suspected, functional imaging may be employed. Positron Emission Tomography (PET) scans measure glucose metabolism in the brain. Areas that cause seizures often show low metabolism (hypometabolism) between seizures, helping to localize the “bad” spot.
The era of precision medicine has transformed pediatric epilepsy diagnosis. Genetic testing is now a standard part of the evaluation for many children, especially those with early onset or drug resistant seizures. Identifying a specific gene mutation can stop the diagnostic odyssey and sometimes point to a specific, targeted therapy.
Finding a genetic cause also has significant implications for family planning and understanding the child’s long term prognosis. It allows clinicians to screen for associated comorbidities, such as heart issues in Dravet syndrome or kidney problems in Tuberous Sclerosis.
For infants or children with unexplained regression, metabolic testing is vital. This involves analyzing blood, urine, and sometimes cerebrospinal fluid to look for chemical imbalances. Conditions like Pyridoxine Dependent Epilepsy can be treated simply with vitamin B6, making early identification critical.
Autoimmune encephalitis is an increasingly recognized cause of new onset seizures in children. In these cases, the body’s immune system attacks the brain. Testing for specific antibodies in the spinal fluid helps identify these treatable conditions, which require immunotherapy rather than just seizure medication.
Not all shaking is a seizure. The differential diagnosis in pediatrics is broad and includes many benign conditions. Breath holding spells, fainting (syncope), and sleep disorders (parasomnias) often mimic epilepsy. Accurate diagnosis prevents the unnecessary use of potentially harmful antiepileptic drugs.
Psychogenic Non Epileptic Seizures (PNES) are physical events that resemble seizures but are caused by psychological distress rather than abnormal electricity. This is more common in adolescents. Video EEG is the definitive way to diagnose this, as the brain waves remain normal during the shaking event.
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The EEG records brain activity only for a short time (20-30 minutes). If the child is not having a seizure or sparking during that specific window, the test can appear normal, but it does not rule out epilepsy.
MRI does not use radiation and is safe. However, young children usually require sedation or anesthesia to lie perfectly still for the duration of the scan to get high quality images.
CT uses radiation and is good for seeing bleeding or bone quickly. MRI uses magnets and is far superior for seeing the details of the brain tissue and finding the subtle scars that cause epilepsy.
Genetic test results can take anywhere from a few weeks to a few months, depending on the complexity of the test (panel vs. whole exome) and insurance authorization processes.
A spinal tap is performed to check for metabolic disorders, genetic conditions that affect the brain fluid, or autoimmune antibodies that cannot be detected in the blood.
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