Differential neural activation for updating rule versus stimulus information in working memory.
Differential neural activation for updating rule versus stimulus information in working memory.
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DOI:
10.1016/j.neuron.2008.05.012
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发表时间:
2008-07-10
期刊:
影响因子:
16.2
通讯作者:
Courtney SM
中科院分区:
文献类型:
--
作者:
Montojo CA;Courtney SM
Establishing what information is actively maintained in working memory (WM) and how it is represented and controlled is essential to understanding how such information guides future behavior. WM has traditionally been investigated in terms of the maintenance of stimulus-specific information, such as locations or words. More recently, investigators have emphasized the importance of rules that establish relationships between those stimuli and the pending response. The current study used a mental arithmetic task with fMRI to test whether updating of numbers (i.e. stimuli) and updating of mathematical operations (i.e. rules) in WM relies on the same neural system. Results indicate that while a common network is activated by both types of updating, rule updating preferentially activates prefrontal cortex while number updating preferentially activates parietal cortex. The results suggest that both numbers and rules are maintained in WM, but they are different types of information that are controlled independently.
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影响因子:
3.7
作者:
Roth, Jennifer K.;Serences, John T.;Courtney, Susan M.
通讯作者:
Courtney, Susan M.
影响因子:
2.5
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Bunge, SA;Kahn, I;Wagner, AD
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Wagner, AD
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Haxby, JV
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ALEXANDER, GE
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KOJIMA, S;GOLDMANRAKIC, PS
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GOLDMANRAKIC, PS