GENERAL HISTOLOGY

Detailed explanation-1: -The surface of the cerebrum is imprinted with numerous ridges or convolutions called gyri. These gyri are separated by grooves; the shallow ones are called sulci and very deep ones are called fissures. The sulci serve as boundaries for the lobes of the cerebrum, the frontal, parietal, occipital, and temporal lobes.

Detailed explanation-2: -A sulcus is a shallower groove that surrounds a gyrus. A fissure is a large furrow that divides the brain into lobes and also into the two hemispheres as the longitudinal fissure.

Detailed explanation-3: -The cortex has many folds to increase the surface area of the brain. The bumps or raised ridges on the outer surface are called gyri (singular gyrus ) and the grooved indentations are called sulci (singular sulcus ).

Detailed explanation-4: -In humans, the lobes of the brain are divided by a number of bumps and grooves. These are known as gyri (bumps) and sulci (groves or fissures). The folding of the brain, and the resulting gyri and sulci, increases its surface area and enables more cerebral cortex matter to fit inside the skull.

Detailed explanation-5: -adj. 1 having little depth. 2 lacking intellectual or mental depth or subtlety; superficial.