====== Parietal lobe ====== {{ ::lateralcorticalsurface.jpg?600|}} The parietal [[lobe]] is one of the four major lobes of the [[cerebral cortex]] in the [[brain]]. The parietal lobe is positioned above (superior to) the [[occipital lobe]] and behind (posterior to) the [[frontal lobe]] and [[central sulcus]]. ===== Boundaries ===== The parietal lobe is defined by three anatomical boundaries: The central sulcus separates the parietal lobe from the frontal lobe; the [[parietooccipital sulcus]] separates the parietal and occipital lobes; the lateral sulcus (sylvian fissure) is the most lateral boundary, separating it from the temporal lobe; and the medial longitudinal fissure divides the two hemispheres. Within each hemisphere, the [[somatosensory cortex]] represents the skin area on the contralateral surface of the body. Immediately posterior to the central sulcus, and the most anterior part of the parietal lobe, is the [[postcentral gyrus]] (Brodmann area 3), the primary somatosensory cortical area. Dividing this and the posterior parietal cortex is the postcentral sulcus. The [[posterior parietal cortex]] can be subdivided into the [[superior parietal lobule]] (Brodmann areas 5 + 7) and the [[inferior parietal lobule]] (39 + 40), separated by the [[intraparietal sulcus]] (IPS). The intraparietal sulcus and adjacent gyri are essential in guidance of limb and eye movement, and—based on cytoarchitectural and functional differences—is further divided into [[medial parietal cortex]] (MIP), lateral (LIP), ventral (VIP), and anterior (AIP) areas. ====Function==== The parietal lobes can be divided into two functional regions. One involves [[sensation]] and [[perception]] and the other is concerned with integrating sensory input, primarily with the [[visual system]]. The first function integrates sensory information to form a single perception (cognition). The second function constructs a spatial coordinate system to represent the world around us. Individuals with damage to the parietal lobes often show striking deficits, such as abnormalities in body image and spatial relations ((Kandel, J., Schwartz, J., & Jessell, T. Principles of Neural Science. 3rd edition. Elsevier. New York: NY, 1991.)). Parietal areas play a crucial role in calculation processing The parietal lobe processes sensory information and is involved in [[orientation]] and [[recognition]]. The parietal lobe contains areas responsible for the sensation of touch and association, this area enables fine judgement of sensation such as texture, weight, size. See [[Inferior parietal lobule]] See [[Superior parietal lobule]] see [[Parietal lobe tumor]]. ---- In 28 consecutive patients who underwent resection of a glial neoplasm found on imaging studies to be confined to the [[parietal lobe]]. Neurological deficits were correlated with hemispheric dominance, location of the lesion within the superior or inferior parietal lobules, subcortical extension, and involvement of the [[postcentral gyrus]] ((Russell SM, Elliott R, Forshaw D, Kelly PJ, Golfinos JG. Resection of parietal lobe gliomas: incidence and evolution of neurological deficits in 28 consecutive patients correlated to the location and morphological characteristics of the tumor. J Neurosurg. 2005 Dec;103(6):1010-7. PubMed PMID: 16381187. )). ===== Parietal lobe tumor ===== [[Parietal lobe tumor]]