What are the three surfaces of the cerebral hemisphere?

Each cerebral hemisphere has three surfaces: the superolateral surface (convex and extensive), the medial surface (flat and vertical, showing the corpus callosum), and the inferior surface (irregular, divided into orbital and tentorial parts).

How many borders does a cerebral hemisphere have?

A cerebral hemisphere has six borders: superomedial, superciliary, inferolateral, medial orbital, inferomedial (hippocampal), and medial occipital.

What are the poles of the cerebral hemisphere?

The cerebral hemisphere has three poles: the frontal pole (anterior and rounded), the occipital pole (posterior and pointed), and the temporal pole (located between frontal and occipital, projecting forward).

What are the main gyri on the superolateral surface of the frontal lobe?

On the superolateral surface of the frontal lobe, main gyri are the precentral gyrus, superior/middle/inferior frontal gyri, and the inferior frontal gyrus (with subdivisions like pars orbitalis).

What structures are found on the medial surface of the cerebral hemisphere?

On the medial surface, structures include the cingulate and callosal sulci, paracentral lobule, medial frontal gyrus, and posterior sulci like calcarine and parieto-occipital forming the cuneus and precuneus.

What are the main features of the inferior surface of the cerebral hemisphere?

The inferior surface has orbital and tentorial parts, with features like the olfactory sulcus and orbital gyri anteriorly, and collateral sulcus, lingual gyrus, and parahippocampal gyrus posteriorly.

What is the purpose of sulci and gyri in the cerebral cortex?

Sulci and gyri increase the cerebral cortex's surface area, enabling more grey matter. Each gyrus consists of a white matter core and grey matter covering.

Cerebral Hemispheres – Lobes, Sulci & Gyri

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