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Principal fissures and lobes of the cerebrum viewed laterally (Parietal Lobe is shown in yellow)
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Lateral surface of left cerebral hemisphere, viewed from the side (Parietal Lobe is in upper right)
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The is a lobe in the
Brain . It is positioned above (superior to) the
Occipital Lobe and behind (posterior to) the
Frontal Lobe .
The
Central Sulcus separates the parietal lobe from the
Frontal Lobe , and the
Parieto-occipital Sulcus separates the parietal and
Occipital Lobe .
The parietal lobe can be subdivided into the
Superior Parietal Lobule and the
Inferior Parietal Lobule with the two separated by the
Intraparietal Sulcus .
The parietal operculum forms the superior wall of
Sylvian Fissure .
It includes
Brodmann Area s
3 ,
5 ,
7 ,
39 and
40 .
The parietal lobe plays important roles in integrating sensory information from various senses, and in the manipulation of objects. Portions of the parietal lobe are involved with visuospatial processing. Much less is known about this lobe than the other three in the cerebrum.
Various studies in the 1990's found that different regions of the parietal cortex in
Macaques represent different parts of space.
- The ventral intraparietal (VIP) area contains a map of space within roughly 5cm of the mouth.
- The medial intraparietal (MIP) area maps space within range of the Macaque's reach. Interestingly, this map changes if the monkey is given a tool to increase its reach.
- The anterior intraparietal (AIP) helps map object location and shape into grasping coordinates.
Gerstmann's Syndrome is associated with lesion to the dominant (usually left) parietal lobe.
Balint's Syndrome is associated with bilateral lesions. The syndrome of
Hemispatial Neglect is usually associated with large lesions of the non-dominant hemisphere.
