Do we have a quantum brain?

No it is too large BUT at the scale of individual protiens, non polar electrons are free to roam and influence the protien to open or close depending upon where it bonds. The electrons obey laws at the quantum scale and in turn influence the folding or unfolding of protiens.

So while the brain as a whole is not a quantum device the most fundamental construction of its building blocks are.

If you accept the idea of a quantum universe you will of course build new brain ciruits which in turn can be built upon. So when you make thought more real than everything else the brain will help you step into the quantum field and tap information that you did not know you knew.

"You know more than you need to know."