Seizures, absence
Seizures, absence: Excerpt from Professional Guide to Signs & Symptoms (Fifth Edition)
Absence seizures are benign, generalized seizures thought to originate subcortically. These brief episodes of unconsciousness usually last 3 to 20 seconds and can occur 100 or more times a day, causing periods of inattention. Absence seizures usually begin between ages 4 and 12. Their first sign may be deteriorating school work and behavior. The cause of these seizures is unknown.
Absence seizures occur without warning. The patient suddenly stops all purposeful activity and stares blankly ahead, as if he were daydreaming. Absence seizures may produce automatisms, such as repetitive lip smacking, or mild clonic or myoclonic movements, including mild jerking of the eyelids. The patient may drop an object that he’s holding, and muscle relaxation may cause him to drop his head or arms or to slump. After the attack, the patient resumes activity, typically unaware of the episode.
Absence status, a rare form of absence seizure, occurs as a prolonged absence seizure or as repeated episodes of these seizures. Usually not life-threatening, it occurs most commonly in patients who have previously experienced absence seizures.
History and physical examination
If you suspect a patient is having an absence seizure, evaluate its occurrence and duration by reciting a series of numbers and then asking him to repeat them after the attack ends. If the patient has had an absence seizure, he’ll be unable to do this. Alternatively, if the seizures are occurring within minutes of each other, ask the patient to count for about 5 minutes. He’ll stop counting during a seizure and resume when it’s over. Look for accompanying automatisms. Find out if the family has noticed a change in behavior or deteriorating schoolwork.
Medical causes
Idiopathic epilepsy
Some forms of absence seizure are accompanied by learning disabilities.
Patient counseling
Explain the purpose of any diagnostic tests, such as computed tomography scans, magnetic resonance imaging, and EEGs. Teach the patient and his family about these seizures and how to recognize their onset, pattern, and duration. Include the child’s teacher and school nurse in the teaching process, if possible. If the seizures are being controlled with drug therapy, emphasize the importance of strict compliance.
Book Source Details
- Book Title: Professional Guide to Signs & Symptoms (Fifth Edition)
- Author(s): Springhouse
- Year of Publication: 2006
- Copyright Details: Professional Guide to Signs & Symptoms (Fifth Edition), Copyright © 2006 Lippincott Williams & Wilkins.
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Copyright notice for book excerpts: Copyright © 2008 Lippincott Williams & Wilkins. All rights reserved.
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