Epilepsy is a non progressive brain disorder that induces recurrent seizures. It is very important to understand that there are numerous disorders that can cause seizures, and in order to make a diagnosis of true epilepsy, many of these other causes must be ruled out.
What is a Seizure?
A seizure is the clinical manifestation of a cerebral disorder that can appear suddenly out of a background of normality, and then disappear with equal abruptness. The term fit is often used colloquially when referring to a seizure.
In humans, an epileptic seizure is a definable event that can be classified according to categories set by the International League Against Epilepsy. A formal classification system specifically for dogs and cats does not exist, but seizures can nevertheless be classified as either partial or generalized episodes.
Partial Seizures
These are seizures in which a localized onset may be determined. They usually have a congenital (present at birth) or an acquired (cancer, encephalitis) cause, and can sometimes evolve into a secondary generalized seizure.
Generalized Seizures
Generalized seizures are the most common type of seizures in dogs and cats. There are several variations of these seizures:
1. Absence seizures (petit mal): sudden brief loss of consciousness, rare in animals
2. Myoclonic seizures: muscle jerk of one or more muscles
3. Clonic seizures: rhythmic muscle contractions
4. Tonic seizures: increase in muscle tone in all skeletal muscles
5. Tonic Clonic seizures (grand mal): the most common form of seizure in pets
