Anatomy of the Cerebral Hemisphere Quiz

Lateral occipital sulcus = Divides the lobe into superior and inferior occipital gyri Lunate sulcus = Runs downwards and slightly forwards just in front of the occipital pole Transverse occipital sulcus = Located in the uppermost part of the occipital lobe Intraparietal sulcus = Divides the parietal lobe into superior and inferior lobules

Supramarginal gyrus = Arches over the upturned posterior end of the posterior ramus of the lateral sulcus Angular gyrus = Arches over the superior temporal sulcus Arcus temporooccipitalis = Arches over the posterior end of the inferior temporal sulcus Gyrus descendens = Vertical strip just in front of the lunate sulcus

Frontal lobe = Anterior to the central sulcus, above the posterior ramus of the lateral sulcus Parietal lobe = Behind the central sulcus, bounded below by the posterior ramus of the lateral sulcus and second imaginary line Occipital lobe = Area lying behind the first imaginary line Temporal lobe = Below the posterior ramus of the lateral sulcus and second imaginary line

Gyri = Present in human brain and brain of higher mammals, separated by sulci Sulci = Variable length and depth, separates two adjacent gyri

Gyrencephalic brain = Contains gyri and sulci in cerebral cortex Lissencephalic brain = Smooth surface in cerebral cortex found in lower mammals, birds, and reptiles

Imaginary lines for subdivision of hemisphere into lobes = Connect upper end of parieto-occipital sulcus to preoccipital notch and form a backward continuation of posterior ramus of lateral sulcus Sulcus description = Has two adjacent walls and floor lined by gray matter overlying white matter core

Cingulate sulcus = Follows a curved course parallel to the upper convex margin of the corpus callosum Gyrus cinguli = Area between the cingulate sulcus and the corpus callosum Paracentral lobule = Smaller posterior part wound around the end of the central sulcus Medial frontal gyrus = Large anterior part of the medial surface of the hemisphere

Parieto-occipital sulcus = Upper end is surrounded by the arcus parieto-occipitalis Callosal sulcus = Separates the gyrus cinguli from the corpus callosum Calcarine sulcus = Bounded inferiorly by this sulcus to cut off the triangular area called cuneus Superomedial border = Bound posteriorly by this border to define the triangular area called cuneus

Arcus parieto-occipitalis = Surrounds the upper end of the parietooccipital sulcus Cuneus = Triangular area cut off by two major sulci behind the paracentral lobule and gyrus cinguli Corpus callosum = Located parallel to the cingulate sulcus on the medial surface of the hemisphere Parts of the corpus callosum = Found on the medial surface along with gyri and sulci

Superolateral surface = Reached by the parietooccipital sulcus from the medial surface Central sulcus = End is wound around by the smaller posterior part called paracentral lobule Parieto-occipital sulcus = Bounded anteriorly and above by this sulcus to define a triangular area called cuneus Superomedial border = Defines the posterior boundary of a triangular area on the medial surface of the hemisphere

Olfactory sulcus = Located close to the medial border of the orbital surface, where the olfactory bulb and tract lie superficial to it Gyrus rectus = The area medial to the olfactory sulcus on the orbital surface Collateral sulcus = A major sulcus on the tentorial surface that runs in an anteroposterior direction Lingual gyrus = The area between the collateral sulcus and calcarine sulcus on the tentorial surface

Orbital surface = Area where the olfactory sulcus and gyrus rectus are located Tentorial surface = Area marked by the collateral sulcus and occipito-temporal sulcus Parahippocampal gyrus = Continuous with the lingual gyrus on the tentorial surface Rhinal sulcus = Cuts off the anterior end of the parahippocampal gyrus from the temporal pole of the hemisphere

Anteroposterior direction = Direction in which major sulci on the tentorial surface run Parallel to calcarine sulcus = Direction in which the posterior part of collateral sulcus runs Curved direction = Shape of rhinal sulcus that cuts off the anterior end of the parahippocampal gyrus Medial border = Location of the anteroposterior olfactory sulcus on the orbital surface

Lingual gyrus - Parahippocampal gyrus = Connected on the tentorial surface Calcarine sulcus - Collateral sulcus = Run parallel to each other Orbital surface - Tentorial surface = Marked by distinct gyri and sulci Rhinal sulcus - Temporal pole = Rhinal sulcus separates it from parahippocampal gyrus