“…Recent brain imaging data (Dehaene et al, 1996;Pesenti, Thioux, Seron, & De Volder, 2000;Pinel et al, 1999;Rickard et al, 2000) have identified the inferior parietal cortex (IPC) as a convergence zone during various numerical tasks with inputs and outputs representing different modalities. IPC and adjacent regions are known to play an important role in various spatial tasks, including visuomotor integration (Nishitani, Uutela, Shibasaki, & Hari, 1999), navigation (Maguire et al, 1998), location working memory (Courtney, Ungerleider, Keil, & Haxby, 1996), and tactile object recognition (Deibert et al, 1999).…”