Cortical Region 90%

The , or cerebral cortex, is the brain's outermost layer of gray matter, serving as the command center for the qualities we consider most "human," such as self-awareness, complex thought, and language . Often described as the "bark" of the brain due to its Latin root cortex , this thin layer—ranging from 2 to 4 millimeters—is extensively folded into ridges called gyri and grooves called sulci to maximize the surface area available for billions of neurons. Functional Landscapes

The cortex is partitioned into distinct lobes, each specializing in critical aspects of human experience: Cerebral Cortex: What It Is, Function & Location cortical region