Peter Attia· MD
in the surface of the brain there's what we call the cortex uh which means literally the the surface of of the of the brain it's like the the rind of a melon except in human beings it's it's quite thin it's just a a few millimeters uh thick and within that few millimeters there are six separate layers within that cortex or rind uh and those are layers of cells so there are six layers of cells in this sort of shawl or rind covering the brain