Sulcus

Rarity: Common

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Notion

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Science and technology

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What Wikipedia says

In neuroanatomy, a sulcus (Latin: "furrow"; pl.: sulci) is a shallow depression or groove in the cerebral cortex. One or more sulci surround a gyrus (pl. gyri), a ridge on the surface of the cortex, creating the characteristic folded appearance of the brain in humans and most other mammals.

Excerpt from the Wikipedia article “Sulcus (neuroanatomy)”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: John A Beal, PhD Dep't. of Cellular Biology & Anatomy, Louisiana State University Health Sciences Center Shreveport, CC BY 2.5, via Wikimedia Commons.