The windmills of your pink paté.

'But how you get a rainbow activity map, or any other useful figure, out of a 2.2 lb lump of pink paté -- that's a part of the story they rarely tell. The truth is, brain tissue looks blah. It's boring. Sliced brain is about as pretty as a thinly chopped white mushroom; you can see only a few obvious structures, and those structures only grossly correlate with brain function. '
Jessica Palmer @ Bioephemera.