 That would be the difference. It's not a resting component. It's more of what we call an action tremor or postural tremor with essential tremors. And that's kind of the difference between Parkinson's and essential tremor. Essential tremor being mostly just the tremor in and of itself, whereas Parkinson's can involve other different organ systems of your body to cause other kind of disability symptoms other than just the tremors. Outside of the ultrasound treatment we're talking about today, what do traditional treatments for essential tremor and Parkinson's disease look like?