“The little human”: image source: Wikimedia Commons  In this journey, we will meet “Two little humans” who “live” on the brain surface. Dr. Wilder Penfield and Edwin Boldrey “discovered” them in 1937. That is an amazing story. They began their expedition while working at McGill University. Dr. Wilder Penfield served there as a brain surgeon. During that time, while operating under local anesthesia, they mapped corresponding brain regions where the sensory information are received from different body parts. They also succeeded in demonstrating the corresponding brain regions which send signals to move relevant body parts. Together with Edwin Boldrey, he…

Brain surface regions Image courtesy: S Bhimji MD; from Neuroanatomy, Postcentral Gyrus Copyright © 2020, StatPearls Publishing LLC. under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), We began this series with the journey to the brain covers. This post journeys on the brain surface. The brain surface is full of ridges (bumps) and valleys (grooves) (see Figure 1). Experts have given specific names to recognize these bumps and grooves. Moreover, in the medical field, the bumps are named gyri (its singular word is gyrus) and grooves as sulci (its singular word is sulcus). The purpose of these ridges…