NEET PG DENTAL EXAM

Detailed explanation-1: -The lateral sulcus of Sylvius, Central sulcus of Rolando, Calcarine sulcus, and Parieto-occipital sulcus are the four main sulci that are constant and divide the cerebral hemisphere into five lobes (5, 6).

Detailed explanation-2: -The parieto-occipital sulcus separates the parietal lobe from the occipital lobe. The lateral fissure (Sylvian fissure) is a laterally located horizontal fissure and separates the temporal lobe from the frontal and parietal lobe.

Detailed explanation-3: -In neuroanatomy, a sulcus (Latin: “furrow", pl. sulci) is a depression or groove in the cerebral cortex.

Detailed explanation-4: -The deep furrows are called fissures and shallow ones are called sulci (singluar; sulcus). The ridges between the sulci are known as a gyri (singular; gyrus). Major sulci and fissures divide each hemisphere into four lobes: the frontal, parietal, occipital, and temporal lobes.