Deep Brain Stimulation

There's a lot of theoretical things about this, you know, like where, where is the stimulation stimulating? Is it the meatballs or spaghetti? And so it wasn't until some basic research came out where people were able to find out they put the stimulated around that area of the deep brain stimulation and put those little light sensors on there. They can then know exactly which neuron, which, which firing's were there. If you flashlight randomly and you see which neurons fire randomly, you know those are those neurons, right?