Dizziness and Balance Center
Types of Epileptic Seizures
Seizures can also take many forms. The two basic categories of epileptic seizures are generalized and partial, which can encompass a variety of types of seizures, as outlined below.
Generalized Seizures impact the whole brain and include types of seizures such as:
Grand Mal Seizures
Grand Mal Seizures, (or tonic-clonic), cause the entire body to convulse or become rigid and can include unconsciousness and loss of bladder control.
Petit Mal Seizures
Petit Mal Seizures (or Absence Seizures), do not cause unconsciousness, but symptoms may include staring into space, facial twitches, eye blinking and repetitive movements. Children who have these seizures are often thought to be daydreaming.
Partial Seizures affect only one part of the brain and include types of seizures such as:
- Simple Partial Seizures occur while the person is awake and symptoms may include spasms or contractions of a specific body part, nausea, and abnormal sensations.
- Complex Partial Seizures may cause the person to be in an "otherworldly" state, fluttering in and out of consciousness.
- Other symptoms include abnormal sensations, inappropriate emotions and random actions.
Non-epileptic seizures can be caused by impaired blood flow to the brain, sleep disorders, psychological disturbances, and various other brain disturbances. Non-epileptic seizures are not caused by epileptic, electrical discharges of brain cells. For many patients epileptic seizures and non-epileptic seizures cause the same types of feelings, movements and other behaviors, but EEG recordings can distinguish epileptic from non-epileptic seizures. Such EEG recordings usually are performed with continuous video recording at the same time, in an Epilepsy Monitoring Unit.
Many patients have a combination of epileptic seizures and non-epileptic seizures. Video-EEG monitoring can be used to show which seizures should be treated with epilepsy medications, and which seizures are non-epileptic and require a different form of treatment. A high degree of expertise is necessary to interpret Video-EEG recordings correctly - the expertise of advanced training and years of experience such as that represented by the staff of the Emory Epilepsy Center.
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