Abstract:
:Months, days of the week, and numbers differ from other verbal concepts because they are ordered in a sequence, whereas no order is imposed on members of other categories, such as animals or tools. Recent studies suggest that numbers activate a representation of their quantity within the intraparietal sulcus (IPS) automatically, that is, in tasks that do not require the processing of quantity. It is unclear, however, whether ordered verbal materials in general and not only numbers activate the IPS in such tasks. In the present functional magnetic resonance imaging study word generation of months, numbers, and animals were compared. Word generation of numbers and nonnumerical materials from an ordered category (months) activated the IPS more strongly than generating items from a not-ordered category such as animals or the verbal control conditions. An ROI analysis of three subregions within the anterior IPS revealed that the most anterior and lateral of these regions, human intraparietal area hIP2, shows a greater sensitivity to ordered materials than the other two areas, hIP1 and hIP3. Interestingly, no difference in activation was observed within the IPS between numbers and months suggesting that the activation of the IPS might not be modulated by the additional quantity information carried by numbers.
journal_name
Hum Brain Mappjournal_title
Human brain mappingauthors
Ischebeck A,Heim S,Siedentopf C,Zamarian L,Schocke M,Kremser C,Egger K,Strenge H,Scheperjans F,Delazer Mdoi
10.1002/hbm.20433subject
Has Abstractpub_date
2008-08-01 00:00:00pages
894-909issue
8eissn
1065-9471issn
1097-0193journal_volume
29pub_type
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