Action-intentional spatial bias in a patient with posterior cortical atrophy.
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.
Cohen
Matthew L
ML
Department of Clinical and Health Psychology, University of Florida, Gainesville, FL 32610, USA. mlcohen@phhp.ufl.edu
Burtis
Brandon
B
Kwon
Jay Cheol
JC
Williamson
John
J
Heilman
Kenneth M
KM
D001284:Atrophy; D001288:Attention; D002540:Cerebral Cortex / Q000473:pathology* / Q000503:physiopathology*; D005260:Female; D007839:Functional Laterality; D006225:Hand; D006801:Humans; D033182:Intention; D008279:Magnetic Resonance Imaging; D008875:Middle Aged; D009048:Motor Skills; D009483:Neuropsychological Tests; D010468:Perceptual Disorders / Q000503:physiopathology / Q000523:psychology*; D049268:Positron-Emission Tomography; D013028:Space Perception