Parkinson's disease is a loss of dopamine producing neurons. So once you start losing 80% and more of your dopamine, which is what happens in Parkinson's, you can't modulate the starting and stopping and smoothing out. The thalamus is that sorting center, the post office, the relay center for all sensory information. It sends it off through a third order neuron to go to the part of the somatosensory cortex that deals with my hand. This sits really deep in the brain. It's like an egg or two eggs next to each other. If it doesn't get to the cortex, you have no idea that it happened. Right. But let's now go