Absence seizure

What are Absence Seizures?
Formerly known as Petit Mal seizures, Absence Seizures involve brief, sudden lapses of consciousness. They are far more common in children than adults.

The "Staring Spell": The person may simply look like they are staring into space for a few seconds. Unlike other types of seizures, they usually do not fall down or suffer physical injury.

Many children outgrow these seizures in their teens. However, they can severely interfere with learning and daily safety if they happen frequently (sometimes dozens of times a day).

Symptoms

The hallmark sign is a vacant stare lasting 10 to 15 seconds. It is often mistaken for daydreaming, ADHD, or a lack of attention. The person recovers immediately with no memory of the event and no lingering confusion.

Subtle physical signs during the stare include:

• Sudden stop in motion without falling.
• Lip smacking or chewing motions.
• Eyelid fluttering.
• Finger rubbing or small, repetitive hand movements.

⚠️ WHEN TO SUSPECT IT
A decline in a child's learning ability or grades is often the first sign. Teachers may report that the child seems "checked out," ignores instructions, or misses parts of the lesson frequently.

When to See a Doctor

Consult a pediatrician or pediatric neurologist if you notice your child having unexplained staring spells, sudden lapses in attention, or if a teacher raises concerns about their focus. Seek immediate emergency care if any seizure lasts longer than five minutes or is followed by prolonged confusion.

Causes

Seizures are caused by abnormal electrical impulses from nerve cells in the brain. During an absence seizure, these electrical signals repeat themselves in a specific 3-second pattern.

Known factors include:

• Genetics: Many children have a genetic predisposition, meaning it often runs in families.
• Hyperventilation: Rapid, deep breathing can easily trigger an episode in susceptible individuals.

Diagnosis

Doctors use specific tests to confirm the diagnosis and rule out other neurological issues:

• EEG (Electroencephalography): The gold standard test. It measures electrical activity in the brain via painless electrodes placed on the scalp.
• The Hyperventilation Test: During the EEG, the child may be asked to breathe rapidly. This often safely provokes a brief seizure in a clinical setting, allowing the doctor to capture the specific brain wave pattern.
• MRI: An imaging scan to rule out structural issues like strokes or tumors (though these are very rare causes for this specific condition).

Treatment

Doctors usually start with the lowest dose of anti-seizure medication necessary to control the episodes. Most children can safely taper off medication under a doctor's supervision after being seizure-free for two years.

Common Medications

• Ethosuximide (Zarontin): The first-choice drug for uncomplicated absence seizures. Most cases respond very well to this.
• Valproic Acid (Depakote): Highly effective, but carries a higher risk of side effects. Women of childbearing age should discuss specific risks with their doctor.
• Lamotrigine (Lamictal): Sometimes used if other medications are ineffective or cause too many adverse effects.

Frequently Asked Questions (FAQs)

Can a child completely outgrow absence seizures?

Yes. Approximately 65% to 70% of children completely outgrow absence seizures by the time they reach adolescence, especially if the seizures began in early childhood.

Are absence seizures dangerous?

The seizures themselves usually do not cause brain damage. However, the sudden lapse in consciousness is very dangerous if the child is doing something that requires attention, such as swimming, riding a bike, or crossing a busy street.

References

• Epilepsy Foundation
• American Academy of Pediatrics (AAP)
• Centers for Disease Control and Prevention (CDC) - Epilepsy