What term describes the raised ridges on the cerebral cortex?

What term describes the raised ridges on the cerebral cortex?

• A. Sulci
• B. Gyri
• C. Fissures
• D. Lobes

Answer: (B)

Raised ridges on the cerebral cortex are called gyri. The cortex is folded into a pattern of elevated bumps and deep grooves, which increases surface area to fit more neurons. The grooves between the bumps are sulci, while fissures are particularly deep grooves that separate major brain regions. Lobes are large anatomical divisions of the cortex, not the ridges themselves. So the term that best describes the raised ridges is gyri.

Raised ridges on the cerebral cortex are called gyri. The cortex is folded into a pattern of elevated bumps and deep grooves, which increases surface area to fit more neurons. The grooves between the bumps are sulci, while fissures are particularly deep grooves that separate major brain regions. Lobes are large anatomical divisions of the cortex, not the ridges themselves. So the term that best describes the raised ridges is gyri.