Which seizure type is defined by brief lapses of consciousness that are most common in preschool children?

Which seizure type is defined by brief lapses of consciousness that are most common in preschool children?

• A. Status epilepticus
• B. Absence seizures
• C. Atonic seizures
• D. Myoclonic seizures

Answer: (B)

Absence seizures are defined by brief lapses of consciousness. In preschool children, this presents as a sudden, brief stare (often with subtle eye blinking or lip smacking) that lasts only a few seconds, after which the child resumes activity with no postictal confusion. Because the spell interrupts awareness but not ongoing motor activity, it can be easily mistaken for daydreaming, yet it represents a distinct seizure type most commonly seen in early childhood. On EEG, absence seizures show a generalized, synchronous 3 Hz spike-and-wave pattern during the event, which helps confirm the diagnosis. Between spells, the child appears normal. This differs from other seizure types: a prolonged, ongoing seizure or frequent seizures without full recovery is status epilepticus; a sudden loss of muscle tone with collapse is an atonic seizure; and sudden, brief jerks are myoclonic seizures. None of these match the characteristic brief lapse of awareness with abrupt return to baseline seen in absence seizures.

Absence seizures are defined by brief lapses of consciousness. In preschool children, this presents as a sudden, brief stare (often with subtle eye blinking or lip smacking) that lasts only a few seconds, after which the child resumes activity with no postictal confusion. Because the spell interrupts awareness but not ongoing motor activity, it can be easily mistaken for daydreaming, yet it represents a distinct seizure type most commonly seen in early childhood.

On EEG, absence seizures show a generalized, synchronous 3 Hz spike-and-wave pattern during the event, which helps confirm the diagnosis. Between spells, the child appears normal.

This differs from other seizure types: a prolonged, ongoing seizure or frequent seizures without full recovery is status epilepticus; a sudden loss of muscle tone with collapse is an atonic seizure; and sudden, brief jerks are myoclonic seizures. None of these match the characteristic brief lapse of awareness with abrupt return to baseline seen in absence seizures.