Gray's FIG. 726 – Lateral surface of left cerebral hemisphere, viewed from the side. Gray's Fig. 727 – Medial surface of left cerebral hemisphere. In neuroanatomy, a<unk>  (pl. gyri) is a ridge on the cerebral cortex. It is generally surrounded by one or more sulci (depressions or furrows; sg. sulcus). Gyri and sulci create the folded appearance of the brain in humans and other mammals.
Gyrus
Microgyrus
Choroid
Tophus
Canthus
Ateronon
Lockets
Orbital septum