Sulcus

The sulci and gyri are the grooves and ridges, respectively.

The Union’s soft latex-polymer roof is cerebrally domed and a cloudy piamater pink except in spots where it’s eroded down to pasty gray, and everywhere textured, the bulging rooftop, with sulci and bulbous convolutions.

The largest sulcus, the longitudinal fissure, divides the brain into left and right hemispheres.

Unlike most other sulci, the lateral sulcus is very deep.

The large surface area of the human cerebral cortex results in a pattern of gyri and sulci.