What is a seizure and what is happening in the brain when it occurs?
Our brains work with electrical impulses, and a seizure occurs when these "misfire". The popular perception of a seizure is that it causes convulsions, but there are other kinds of seizure too, that have more subtle effects. It all depends on whether the whole brain is affected, or only part. This video explains further:
Read more on the different types of seizure.