Abstract：
:Experts of abacus operation demonstrate extraordinary ability in mental calculation. There is psychological evidence that abacus experts utilize a mental image of an abacus to remember and manipulate large numbers in solving problems; however, the neural correlates underlying this expertise are unknown. Using functional magnetic resonance imaging, we compared the neural correlates associated with three mental-operation tasks (numeral, spatial, verbal) among six experts in abacus operations and eight nonexperts. In general, there was more involvement of neural correlates for visuospatial processing (e.g., right premotor and parietal areas) for abacus experts during the numeral mental-operation task. Activity of these areas and the fusiform cortex was correlated with the size of numerals used in the numeral mental-operation task. Particularly, the posterior superior parietal cortex revealed significantly enhanced activity for experts compared with controls during the numeral mental-operation task. Comparison with the other mental-operation tasks indicated that activity in the posterior superior parietal cortex was relatively specific to computation in 2-dimensional space. In conclusion, mental calculation of abacus experts is likely associated with enhanced involvement of the neural resources for visuospatial information processing in 2-dimensional space.
journal_name
Neuroimagejournal_title
NeuroImageauthors
Hanakawa T,Honda M,Okada T,Fukuyama H,Shibasaki Hdoi
10.1016/s1053-8119(03)00050-8keywords:
subject
Has Abstractpub_date
2003-06-01 00:00:00pages
296-307issue
2 Pt 1eissn
1053-8119issn
1095-9572pii
S1053811903000508journal_volume
19pub_type
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