A seizure is characterized by uncontrolled, synchronized electrical activity across a large mass of brain cells.

“And what a seizure is is basically when you have this very uncontrolled synchrony of a large mass of the brain cells. So, normally if you think about the brain and the neurons within the brain, it's like people in a stadium, they're having their individual conversations. Um, that's the way the brain normally works. Um, but let's say all of a sudden everyone's doing a wave and something hypercoordinated. All of those like normal conversations are now gone. The brain has now become hijacked by this other phenomena where everything has become very coordinated. That's why people lose consciousness because all the normal function is basically shut down.”