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  • Title: Action-intentional spatial bias in a patient with posterior cortical atrophy.
    Author: Cohen ML, Burtis B, Kwon JC, Williamson J, Heilman KM.
    Journal: Neurocase; 2010 Dec; 16(6):529-34. PubMed ID: 20672222.
    Abstract:
    Patients without sensory neglect might demonstrate a spatial deviation when drawing. To better understand the mechanism of this deviation, we examined a 61-year-old woman with probable posterior cortical atrophy (PCA) who on imaging showed right hemisphere atrophy and dysfunction. When drawing a clock she correctly made a circle, but when writing the numbers deviated to the left. A blindfolded midsagittal plane pointing test revealed that her leftward deviation was action-intentional rather than perceptual-attentional. This action-intentional deviation was made manifest by altering visual feedback such as having her focus her attention on the clock numbers.
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