You got already a big solid database to work yourself into, so I'll keep it more on the pshycologcal side of it, which you won't find otherwhere easily.
It's simple. Emotions are ways of realising our surroundings and what happens on them. If you can rely on other way to explore and aknwolodge you surroudings, your brain will shut down what it's not needed until it's needed again. You don't need to worry, nor anyhing, it's as simple as told.
BUT these questionaries are not acurate. They're pretty inacurate actually, so you shouldn't believe on that easily. It's safe to believe, and safer to have a little doubt and curiosity. ;)
Emotions are personal. There's no other way to know if you're numb or no but by doing something you done once, felt something and remebers it and do it again, and hope for the same results, which prolly won't happen.
As I said before, i'll keep it on the more unsafe, or unsolid, side of it, sothere's not much to write about.
Good luck finding that out on your on.