All seizures are caused by abnormal electrical disturbances in the brain. Partial (focal) seizures occur when this electrical activity remains in a limited area of the brain. The seizures may sometimes turn into generalized seizures, which affect the whole brain. This is called secondary generalization.
Partial seizures can be further characterized as:
- Simple -- not affecting awareness or memory
- Complex -- affecting awareness or memory of events before, during, and immediately after the seizure, and affecting behavior
For more information, see:
Generalized tonic clonic seizure (grand mal seizure)
Petit mal seizure
Focal seizure; Jacksonian seizure; Seizure - partial (focal); Temporal lobe seizure