Switching attention and resolving interference: fMRI measures of executive functions
Sylvester, Ching-Yune C, Wager, Tor D, Lacey, Steven C, Hernandez, Luis, Nichols, Thomas E, Smith, Edward E and Jonides, John. (2002) Switching attention and resolving interference: fMRI measures of executive functions. Neuropsychologia, Vol. 41 (No. 3). pp. 357-370. ISSN 00283932Full text not available from this repository.
Official URL: http://dx.doi.org/10.1016/S0028-3932(02)00167-7
Is there a single executive process or are there multiple executive processes that work together towards the same goal in some task? In these experiments, we use counter switching and response inhibition tasks to examine the neural underpinnings of two cognitive processes that have often been identified as potential executive processes: the switching of attention between tasks, and the resolution of interference between competing task responses. Using functional magnetic resonance imaging (fMRI), for both event-related and blocked design tasks, we find evidence for common neural areas across both tasks in bilateral parietal cortex (BA 40), left dorsolateral prefrontal cortex (DLPFC; BA 9), premotor cortex (BA 6) and medial frontal cortex (BA 6/32). However, we also find areas preferentially involved in the switching of attention between mental counts (BA 7, BA 18) and the inhibition of a prepotent motor response (BA 6, BA 10), respectively. These findings provide evidence for the separability of cognitive processes underlying executive control.
|Item Type:||Journal Article|
|Divisions:||Faculty of Science > Statistics|
|Journal or Publication Title:||Neuropsychologia|
|Date:||12 November 2002|
|Page Range:||pp. 357-370|
|Access rights to Published version:||Restricted or Subscription Access|
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