[spacetimeuser5]

Reduced skeletal muscle tone during sleep is pretty much established. If you find out, that there remains some increased muscle tone which correlates with insomnia or reduces the efficiency of PTAS, you could target it. Though you're already targeting it indirectly via delta waves.

[pedalpete]

Yes, reduced muscle tone is absolutely established, now I think I know what you're saying. We're often letting the researchers guide the areas they are most interested in. Lot's of interest in Alzheimer's, Parkinson's, and depression. We're interested in looking at insulin response and other metabolic factors.