PSYCH 2NF3 Chapter Notes - Chapter 14: Posterior Parietal Cortex, Postcentral Gyrus, Supramarginal Gyrus
25 Aug 2016
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Document Summary
The parietal region of the cerebral cortex lies between the frontal and occipital lobes, underlying the parietal bone at the roof of the skull. This area is roughly demarcated anteriorly by the central fissure, ventrally by the lateral (sylvian) fissure, dorsally by the cingulate gyrus, and posteriorly parieto- occipital sulcus. The principle regions of the parietal lobe include the postcentral gyrus (brodmann"s areas 3-1-2), superior parietal lobule (areas 5 and 7), parietal operculum (area. 43), supramarginal gyrus (area 40), and angular gyrus (area 39) Supramarginal gyrus and angular gyrus = inferior parietal lobe. Parietal lobe can be divided into two functional zones: Anterior zone including areas 3-1-2 and 43=43 somatasensory cortex. Posterior zone includes area 5,7,40, and 39= posterior parietal cortex. Through human evolution, the parietal lobes have undergone major expansion, specifically in inferior region. Von economo"s map= described in humans and monkeys. Three posterior parietal areas = pe, pf, and pg. Pg=areas 43 and 40 plus part of 7.
