Which term refers to the grooves or wrinkles on the brain?

Which term refers to the grooves or wrinkles on the brain?

• A. Sulcus
• B. Gyrus
• C. Cortex
• D. Fissure

Answer: (A)

The term that refers to the grooves or wrinkles on the brain is "sulcus." Sulci are the fissures or depressions that separate the gyri, which are the raised areas or convolutions on the brain's surface. The structure of the brain includes these sulci to increase its surface area and, therefore, enhance its ability to process information. A sulcus can be quite significant, as it not only divides the brain into different regions but also plays a role in functional specialization. For instance, deeper sulci can define important borders in the cerebrum, facilitating the organization of brain functions and the localization of neurons that serve specific cognitive roles. The other terms in the context of brain morphology refer to different structures. The gyrus describes the raised part of the brain between two sulci. The cortex refers to the outer layer of the brain, which is heavily involved in complex functions like perception, cognition, and motor control. Finally, a fissure typically refers to a deeper groove than a sulcus; for example, the longitudinal fissure separates the two hemispheres of the brain, while sulci are generally smaller. Thus, "sulcus" is the most precise term for the grooves or wrinkles specifically.

The term that refers to the grooves or wrinkles on the brain is "sulcus." Sulci are the fissures or depressions that separate the gyri, which are the raised areas or convolutions on the brain's surface. The structure of the brain includes these sulci to increase its surface area and, therefore, enhance its ability to process information.

A sulcus can be quite significant, as it not only divides the brain into different regions but also plays a role in functional specialization. For instance, deeper sulci can define important borders in the cerebrum, facilitating the organization of brain functions and the localization of neurons that serve specific cognitive roles.

The other terms in the context of brain morphology refer to different structures. The gyrus describes the raised part of the brain between two sulci. The cortex refers to the outer layer of the brain, which is heavily involved in complex functions like perception, cognition, and motor control. Finally, a fissure typically refers to a deeper groove than a sulcus; for example, the longitudinal fissure separates the two hemispheres of the brain, while sulci are generally smaller. Thus, "sulcus" is the most precise term for the grooves or wrinkles specifically.