Is Grey Matter Dark Matter?

Most people accept that the majority of light is non-visible.

Still more accept the idea that we only use about 5% of our brain's potential.

And with the Universe consisting of 70% Dark Energy and 26% Dark Matter - it would seem that we are only able to identify about 5% of it's contents.

Is our understanding of Dark Energy and Dark Matter related to the development of our Grey Matter?

When primitive man only understood his local surroundings - was his brain operating at even less than our current 5%?