[throwaway11460]

There's evidence that biology takes advantage of quantum effects on all levels - all the way from individual chemical bonds and interactions of molecules (quantum biochemistry) up to cellular and multi-cellular. Mostly because there's no way it could work on such small scales and be so energy efficient if it didn't.

So one thing is certain - the brain does use quantum mechanics just like the rest of the body, because otherwise it wouldn't be possible to have so much done inside such a small volume, with such small amounts of energy.

Of course this question is actually meant to be "is brain a quantum computer?" and we don't have any idea.

[613style]

> otherwise it wouldn't be possible to have so much done inside such a small volume, with such small amounts of energy

That's interesting. Could you share your source?

[throwaway11460]

Meh, down voters have no idea what they're talking/reading about and yet they down vote. Not everything about quantum mechanics is voodoo. Sorry, not in the mood to talk about this here any more.

The Wikipedia page is a good start, it has some relevant references to research articles in the Enzyme catalysis and Energy transfer sections: https://en.m.wikipedia.org/wiki/Quantum_biology

Quantum effects are also used inside cells to convert chemical energy to motion. It wouldn't be possible otherwise at that nanoscale.