Gyrus Angularis, Posterior View

Description

Posteriorly oriented over the parietal convexity, the gyrus angularis is highlighted bilaterally as the cortical arch that caps the posterior end of the superior temporal sulcus and curves around the termination of the sulcus lateralis (Sylvian fissure) at the temporoparietal junction. It lies lateral to the medial parietal cortex and superior to the posterior superior temporal gyrus, with the occipital lobe positioned just posterior and inferior across the parieto-occipital region. Nearby landmarks you would expect from this superior-posterior vantage include the adjacent supramarginal gyrus anteroinferiorly and the intraparietal sulcus running anteroposterior across the dorsal parietal lobe. The cerebellar hemispheres and vermis sit inferior to the cerebrum, separated by the transverse fissure. Clinically, accurate localization of the angular gyrus matters because lesions in the dominant hemisphere, classically the left, can produce Gerstmann syndrome (agraphia, acalculia, finger agnosia, and left-right disorientation) and contribute to alexia or anomia when the surrounding temporoparietal cortex is involved. This posterior view also supports teaching of cortical “watershed” vulnerability, since the region sits near border zones between middle cerebral artery and posterior cerebral artery territories and is often implicated in embolic or hypoperfusion-related infarcts affecting reading and calculation. Use this plate for neuroanatomy and cognitive neuroscience teaching when mapping lobar boundaries and the temporoparietal junction, or for neurology and neuroradiology texts that correlate posterior cortical strokes with higher-order language and visuospatial symptoms. It also fits preoperative planning discussions in awake craniotomy contexts where surface landmarks guide cortical mapping around perisylvian association cortex. Anatomical accuracy verified by SciePro's Medical Advisory Board.