Editing Spatial memory (section)

===Posterior parietal cortex===
[[File:Parietal lobe animation.gif|thumb|left|110px|alt=rotating 3D animation of the parietal lobe in human skull.|Parietal lobe shown in red]]

The [[Parietal lobe|parietal cortex]] encodes spatial information using an egocentric frame of reference. It is therefore involved in the transformation of sensory information coordinates into action or effector coordinates by updating the spatial representation of the body within the environment.<ref>{{cite journal | last1 = Colby | first1 = C. L. | last2 = Goldberg | first2 = M. E. | year = 1999 | title = Space and attention in parietal cortex | journal = Annual Review of Neuroscience | volume = 22 | pages = 319–349 | doi = 10.1146/annurev.neuro.22.1.319 | pmid = 10202542 }}</ref> As a result, lesions to the parietal cortex produce deficits in the acquisition and retention of egocentric tasks, whereas minor impairment is seen among allocentric tasks.<ref>{{cite journal | last1 = Save | first1 = E. | last2 = Moghaddam | first2 = M. | year = 1996 | title = Effects of lesions of the associative parietal cortex on the acquisition and use of spatial memory in egocentric and allocentric navigation tasks in the rat | journal = Behavioral Neuroscience | volume = 110 | issue = 1| pages = 74–85 | doi = 10.1037/0735-7044.110.1.74 | pmid = 8652075 }}</ref>

Rats with lesions to the [[Anatomical terms of location#Anterior and posterior|anterior]] region of the [[posterior parietal cortex]] reexplore displaced objects, while rats with lesions to the [[Anatomical terms of location#Anterior and posterior|posterior]] region of the posterior parietal cortex displayed no reaction to spatial change.<ref name="Save, E. 1992"/>

Parietal cortex lesions are also known to produce temporally ungraded [[retrograde amnesia]].<ref name="Cho, Y. H. 1996">{{cite journal | last1 = Cho | first1 = Y. H. | last2 = Kesner | first2 = R. P. | year = 1996 | title = Involvement of entorhinal cortex or parietal cortex in long-term spatial discrimination memory in rats: Retrograde amnesia | journal = Behavioral Neuroscience | volume = 110 | issue = 3| pages = 436–442 | doi = 10.1037/0735-7044.110.3.436 | pmid = 8888988 }}</ref>