What is excitotoxicity?

Excitotoxicity is when something too much causes harm to brain cells.

Imagine your favorite toy has a button that makes it go super fast, but if you press it too many times, the toy breaks. That’s kind of like what happens with excitotoxicity in the brain. Brain cells use special messages called neurotransmitters to talk to each other. One of these messengers is called glutamate, and it helps brain cells stay active and healthy.

But if there's too much glutamate, it can cause a kind of "brain overload." It’s like when you're playing with your toy for hours, the battery runs out, and the toy stops working. In the brain, too much glutamate can make brain cells get tired, stressed, or even die.

This is why excitotoxicity happens in some diseases, it's like giving a toy way too many button presses all at once!