Preoccipital Notch Of The Brain, Lateral View

Description

Preoccipital notch on the inferolateral margin of the cerebrum anchors this lateral view at the junction of the temporal lobe and occipital lobe. From a fixed lateral perspective, the indentation sits posterior to the inferior temporal gyrus and anterior to the occipital pole, outlining the ventral border where the hemisphere curves toward the tentorial surface. Superiorly, the lateral convexity of the temporal region transitions to lateral occipital cortex, while the notch provides a surface landmark for the temporo-occipital boundary when sulcal patterns vary between individuals. A small landmark. Neuroanatomy teaching often treats lobe boundaries as obvious, but on the lateral surface the temporal and occipital lobes blend, so the preoccipital notch becomes the practical separator used alongside the parieto-occipital sulcus (more medial) to approximate the occipital lobe on gross inspection. This is the reference point many clinicians reach for when describing lesion location across the temporo-occipital junction, such as posterior temporal infarcts at the MCA-PCA border zone or contusions along the ventral border after acceleration injury. The lateral view also supports surgical and radiologic communication, where a consistent external landmark helps correlate cortical geography with operative notes and cross-sectional imaging, even when the calcarine region itself is not directly visible laterally. Use this illustration in neuroanatomy lab manuals, neurosurgical approach overviews discussing posterior temporal and occipital exposures, and neuroradiology teaching files that require standardized surface terminology for the human brain. It also fits medical publishing layouts that label lobes and borders without overloading the reader with deep sulcal anatomy. Anatomical accuracy verified by SciePro's Medical Advisory Board.