Absence seizures involves brief, sudden lapses of consciousness. They’re more frequent in children than in adults.
Someone having an absence seizure may seem like he or she is staring blankly into space for a few seconds. Then, there is a quick return to a normal level of alertness. This type of seizure usually doesn’t result in physical injury.
Absence seizures often can be controlled with anti-seizure medications. Some children who have them also develop other seizures. Many children outgrow absence seizures in their teens.
A sign of simple absence seizure is a vacant stare, which may be mistaken for a lapse in attention that could lasts about 10 seconds, though it may last as long as 20 seconds, without any confusion, headache or drowsiness afterward. Signs and symptoms of absence seizures are inclusive of:
- Sudden stop in motion without falling
- Lip smacking
- Eyelid flutters
- Chewing motions
- Finger rubbing
- Small movements of both hands
Thereafter, there’s no memory of the incident. Some people have many episodes daily, which interfere with school or daily activities.
A child may have absence seizures for some time before an adult observes the seizures, because they’re so brief. A decline in a child’s learning ability may be the first signal of this disorder. Teachers may comment about a child’s inability to pay attention or that a child is often daydreaming.
When to meet a doctor
Contact your doctor:
- The first time you observe a seizure
- If this is a new kind of seizure
- If the seizures continue to happen despite taking anti-seizure medication
Contact any emergency services in your area:
- If you observe prolonged automatic behaviors lasting minutes to hours — activities such as eating or moving without awareness — or prolonged confusion, possible signs of a condition called absence status epilepticus
- After any seizure lasting for more than five minutes
Many children seem to have a genetic predisposition to absence seizures.
In general, seizures are created by abnormal electrical impulses from nerve cells (neurons) in the brain. The brain’s nerve cells normally send electrical and chemical signals across the synapses that connect them.
In people who have seizures, the brain’s usual electrical activity is altered. During an absence seizure, these electrical signals repeat themselves over and over in a three-second pattern.
People who have seizures may also have altered levels of the chemical messengers that help the nerve cells communicate with one another (neurotransmitters).
READ ALSO:SCHIZOPHRENIA;SYMPTOMS AND CAUSES
Certain factors are common to children who have absence seizures, including:
- Absence seizures are more frequent in children between the ages of 4 and 14.
- Absence seizures are more common in girls.
- Family members who have seizures.Nearly half of children with absence seizures have a close relative who has seizures.
While most children outgrow absence seizures, some:
- Must take anti-seizure medications throughout life to prevent seizures
- Eventually have full convulsions, such as generalized tonic-clonic seizures
Other complications can be:
- Learning difficulties
- Behavior problems
- Social isolation