Parahippocampal Gyrus Of The Brain (Inferior View)

Description

Parahippocampal gyrus occupies the medial aspect of the basal temporal lobe in this inferior (ventral) view, forming a longitudinal ridge that runs anteroposteriorly beside the hippocampal formation. Medially, its cortex borders the ambient cistern region and the tentorial edge, while laterally it is separated from the fusiform (occipitotemporal) gyrus by the collateral sulcus. The anterior end bulges into the uncus near the temporal pole, a hooklike prominence closely related to the amygdala and the head of the hippocampus; posteriorly, the gyrus continues toward the parahippocampal isthmus as the medial temporal surface approaches the occipital lobe. Spatial relationships are explicit. Entorhinal cortex on the anterior parahippocampal gyrus provides the principal cortical gateway to the hippocampus, so this perspective is central when teaching memory circuitry, spatial navigation networks, and the medial temporal lobe’s vulnerability in early Alzheimer disease. Inferior visualization also supports clinical discussions of uncal herniation, where medial temporal displacement compresses the oculomotor nerve and posterior cerebral artery, producing anisocoria and occipital infarction patterns that track back to this anteromedial temporal anatomy. The surface sulci and gyral contours in a fixed ventral viewpoint help correlate gross anatomy with coronal MR sections that cut through the uncus, collateral sulcus, and hippocampal head during epilepsy workup. Use this illustration in neuroanatomy and neuropsychology curricula covering hippocampal connections, in neuroradiology teaching files correlating ventral temporal landmarks with MR imaging, and in neurosurgical publishing for temporal lobe epilepsy procedures such as selective amygdalohippocampectomy where medial temporal orientation is nonnegotiable. Anatomical accuracy verified by SciePro's Medical Advisory Board.