Abstract
A rapidly growing tumor in the left posterior parietal lobe of a right-handed, 72 year old artist resulted in bilateral neglect and constructional apraxia that were greater on the right side of his painting than on the left. These changes indicate that a left posterior parietal lesion alters visuospatial perception and constructional ability on both sides of a painting with the contralateral hemispace more impaired than the ipsilateral hemispace. Primitivization of emotional expressions on human faces also occurred.
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