Seizures

Studies show roughly one-third of individuals with autism also experience seizures.
The following information was obtained from epilepsy.com

There are so many kinds of seizures that neurologists who specialize in epilepsy are still updating their thinking about how to classify them. Usually, they classify seizures into two types, primary generalized seizures and partial seizures. The difference between these types is in how they begin:
Primary generalized seizures
Primary generalized seizures begin with a widespread electrical discharge that involves both sides of the brain at once. Hereditary factors are important in many of these seizures.
Partial seizures
Partial seizures begin with an electrical discharge in one limited area of the brain. Some are related to head injury, brain infection, stroke, or tumor, but in most cases the cause is unknown.
One question that is used to further classify partial seizures is whether consciousness (the ability to respond and remember) is "impaired" or "preserved." The difference may seem obvious, but really there are many degrees of impairment or preservation of consciousness.

Links to types of Primary Generalized Seizures:
Absence seizures
Atypical absence seizures
Myoclonic seizures
Atonic seizures
Tonic seizures
Clonic seizures
Tonic-clonic seizures

Links to types of Partial Seizures
Simple partial seizures
Complex partial seizures
Secondarily generalized seizures