In laboratory research, rodent models of seizure
activity, typically differentiate between absence seizures (a type of generalized epilepsy, in which
electrical activity of the entire
brain is affected), and mesial temporal
lobe epilepsy (a type of partial epilepsy, which only affects one hemisphere of the
brain).
In migraine with aura, many researchers now believe, a wave of
electrical activity begins — usually at the part of the
brain responsible for vision in the occipital
lobe, at the back of the head — and then spreads forward over the
brain's surface.