Origin of cortical
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
1670s, from Modern Latin corticalis, from cortex "bark of a tree" (see cortex).
Online Etymology Dictionary, © 2010 Douglas Harper
Of, relating to, derived from, or consisting of cortex.
Of, relating to, associated with, or depending on the cerebral cortex.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.