the.com/cerebral cortex
A crumpled sheet of gray matter doing the universe's only known act of self-reflection.
means The thin, folded outer layer of the brain where sensory processing, thought, language, and voluntary movement get organized.
from From Latin 'cerebrum' (brain) plus 'cortex,' meaning bark or rind — the same word used for tree bark. Anatomists borrowed it because this outer layer wraps the brain's inner tissue the way bark wraps a trunk, a naming habit you see across anatomy wherever something forms a rind around a core.
- surface area
- flattens out to roughly a pillowcase
- folding reason
- wrinkles cram more neurons into a small skull
- thickness
- only about 2 to 4 millimeters deep
- layers
- six distinct layers, each wired differently