These seizures usually start in a small area of the temporal lobe or frontal lobe of the brain. They quickly involve other areas of the brain that affect alertness and awareness. So even though the person's eyes are open and they may make movements that seem to have a purpose, in reality "nobody's home." If the symptoms are subtle, other people may think the person is just daydreaming.

Some people can have seizures of this kind without realizing that anything has happened. Because the seizure can wipe out memories of events just before or after it, memory lapses can be a problem.

Some of these seizures (usually ones beginning in the temporal lobe) start with a simple partial seizure (also called an aura) which can be an odd feeling in the stomach or a feeling of fear or other unusual experience. Then the person loses awareness and stares blankly. Most people move their mouth, pick at the air or their clothing, or perform other purposeless actions. These movements are called "automatisms" (aw-TOM-ah-TIZ-ums). Less often, people may repeat words or phrases, laugh, scream, or cry. Some people do things during these seizures that can be dangerous or embarrassing, such as walking into traffic, taking their clothes off, or running.

Complex partial seizures starting in the frontal lobe tend to be shorter than the ones from the temporal lobe. The seizures that start in the frontal lobe are also more likely to include automatisms like bicycling movements of the legs or pelvic thrusting. Complex partial seizures can end on their own and last between 30 seconds and 2 minutes. Afterward, the person may be tired or confused for about 15 minutes and may not be fully normal for hours. Some may turn into secondarily generalized seizures (see tonic clonic seizures).

• Complex Partial Seizures

Continue to Simple Partial Seizures

Topic Editor: Steven C. Schachter, MD and Patricia O. Shafer, RN, MN.
Last Reviewed:5/25/07

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