Visuospatial Perception

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Visuoperceptual impairments are thought to occur in early PD, even when motoric task demands are minimized (62,63); however, some argue that visuoperceptual impairments are secondary to deficits in set-shifting, spatial memory, bradyphrenia, and dexterity (34,64). Visuospatial impairments do not appear to improve with dopamine replacement and do not reliably vary with motor "on" and "off" periods. Thus, if dopamine impacts visuoperceptual abnormalities in PD, it is probably in conjunction with other neurochemical or pathophysiological processes (65).

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