The influence of the place-value structure of the Arabic number ...

were found bilaterally in the dorsolateral and ventrolateral prefrontal cortex as well as in the
homologue of Broca`s area (Figure 1A, Table 3).
Small range > large range: When bisection range decreased, increased fMRI signal
was found in the anterior cingulate, the right dorsolateral prefrontal cortex, and the
retrosplenial cortex (Figure 1A, Table 3).
Decade crossing > non-crossing: Activation in a large network of cortical regions was
observed for triplets crossing a decade boundary (Figure 1B, Table 4). The intraparietal cortex
as well as areas in the temporo-occipital junction was activated bilaterally as was the
extrastriate cortex. Further clusters of activation were found bilaterally in the dorsolateral
prefrontal cortex, in the SMA and the premotor cortex. Finally, the ventrolateral prefrontal
cortex was activated bilaterally.
No-decade-crossing > decade crossing: Stronger fMRI signal was registered in the
angular gyrus as well as in the supramarginal gyrus bilaterally. Further activation clusters
were observed in the dorsolateral prefrontal cortex, anterior cingulate and retrosplenial cortex
bilaterally (Figure 1B, Table 4).
Large problem size > small problem size: When problem size increased, activation
was increased in the striate and extrastriate cortex bilaterally, in the left temporo-occipital
junction and medial portions of the cerebellum (Figure 1C, Table 5).
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