We do not only use 10% of our brain.

[nolabels]

88. Some Native American civilizations were saying that before Lief Erickson happened in

Anyway in more recent times i have found that we have this little blurb

HOW YOUR BRAIN TELLS YOUR ARM TO GET READY, SET, GO
(snip)
Instead, roughly 50 milliseconds after the electrical readings showed evidence of perception, a change in neuronal activity signaled the command to touch the target; it came with no apparent further preparation between perception and action. “Ready, set” was unnecessary. In these instances, the neurons just said, “Go!”
(snip)
http://www.futurity.org/brain-gets-set-action/

And like, well duh, i think there is an even more obvious and simpler example in the knee reflex. Imagine all the thing we really don't know about yet

And what i was getting on about with bacteria in our digestive system

What Your Gut Bacteria Say About You
(snip)
"You're Hungry... Very, Very Hungry"
Surprisingly, gut bacteria may also control appetite, nudging you toward the oozy, creamy, crunchy foods they like. Fact is, the little buggers have species-specific appetites (a microbiologist can tell what types of food you eat and predict whether you're slender or not just from the variety of microbes in your stool sample).
(snip)
http://www.huffingtonpost.com/2013/09/16/gut-bacteria-influence_n_3908465.html