what are the three major groups of seizures

The three major groups of seizures are generalized seizures, focal seizures, and unknown onset seizures.

Quick Scoop

• Generalized seizures start in or affect both sides of the brain at the same time.

• Focal seizures start in one part of the brain and may stay there or spread.

• Unknown onset seizures are used when the start of the seizure is not known, often because no one saw it begin.

Group| What it means
---|---
Generalized seizures| Affects both sides of the brain at once 16
Focal seizures| Starts in one area of the brain 16
Unknown onset seizures| Start time or location is not clear 67

A simple way to remember it is: both sides, one side, or not sure yet.