Advanced search
1 file | 1.51 MB

Switch-independent task representations in frontal and parietal cortex

(2017) JOURNAL OF NEUROSCIENCE. 37(33). p.8033-8042
Author
Organization
Abstract
Alternating between two tasks is effortful and impairs performance. Previous fMRI studies have found increased activity in frontoparietal cortex when task switching is required. One possibility is that the additional control demands for switch trials are met by strengthening task representations in the human brain. Alternatively, on switch trials, the residual representation of the previous task might impede the buildup of a neural task representation. This would predict weaker task representations on switch trials, thus also explaining the performance costs. To test this, male and female participants were cued to perform one of two similar tasks, with the task being repeated or switched between successive trials. Multivoxel pattern analysis was used to test which regions encode the tasks and whether this encoding differs between switch and repeat trials. As expected, we found information about task representations in frontal and parietal cortex, but there was no difference in the decoding accuracy of task-related information between switch and repeat trials. Using cross-classification, we found that the frontoparietal cortex encodes tasks using a generalizable spatial pattern in switch and repeat trials. Therefore, task representations in frontal and parietal cortex are largely switch independent. We found no evidence that neural information about task representations in these regions can explain behavioral costs usually associated with task switching.
Keywords
cognitive control, fMRI, MVPA, parietal cortex, task switching, task set

Downloads

  • Loose2017JNeuro.pdf
    • full text
    • |
    • open access
    • |
    • PDF
    • |
    • 1.51 MB

Citation

Please use this url to cite or link to this publication:

Chicago
Loose, Lasse S., David Wisniewski, Marco Rusconi, Thomas Goschke, and John-Dylan Haynes. 2017. “Switch-independent Task Representations in Frontal and Parietal Cortex.” Journal of Neuroscience 37 (33): 8033–8042.
APA
Loose, L. S., Wisniewski, D., Rusconi, M., Goschke, T., & Haynes, J.-D. (2017). Switch-independent task representations in frontal and parietal cortex. JOURNAL OF NEUROSCIENCE, 37(33), 8033–8042.
Vancouver
1.
Loose LS, Wisniewski D, Rusconi M, Goschke T, Haynes J-D. Switch-independent task representations in frontal and parietal cortex. JOURNAL OF NEUROSCIENCE. Society for Neuroscience; 2017;37(33):8033–42.
MLA
Loose, Lasse S. et al. “Switch-independent Task Representations in Frontal and Parietal Cortex.” JOURNAL OF NEUROSCIENCE 37.33 (2017): 8033–8042. Print.
@article{8549001,
  abstract     = {Alternating between two tasks is effortful and impairs performance. Previous fMRI studies have found increased activity in frontoparietal cortex when task switching is required. One possibility is that the additional control demands for switch trials are met by strengthening task representations in the human brain. Alternatively, on switch trials, the residual representation of the previous task might impede the buildup of a neural task representation. This would predict weaker task representations on switch trials, thus also explaining the performance costs. To test this, male and female participants were cued to perform one of two similar tasks, with the task being repeated or switched between successive trials. Multivoxel pattern analysis was used to test which regions encode the tasks and whether this encoding differs between switch and repeat trials. As expected, we found information about task representations in frontal and parietal cortex, but there was no difference in the decoding accuracy of task-related information between switch and repeat trials. Using cross-classification, we found that the frontoparietal cortex encodes tasks using a generalizable spatial pattern in switch and repeat trials. Therefore, task representations in frontal and parietal cortex are largely switch independent. We found no evidence that neural information about task representations in these regions can explain behavioral costs usually associated with task switching.},
  author       = {Loose, Lasse S. and Wisniewski, David and Rusconi, Marco and Goschke, Thomas and Haynes, John-Dylan},
  issn         = {0270-6474},
  journal      = {JOURNAL OF NEUROSCIENCE},
  keywords     = {cognitive control,fMRI,MVPA,parietal cortex,task switching,task set},
  language     = {eng},
  number       = {33},
  pages        = {8033--8042},
  publisher    = {Society for Neuroscience},
  title        = {Switch-independent task representations in frontal and parietal cortex},
  url          = {http://dx.doi.org/10.1523/jneurosci.3656-16.2017},
  volume       = {37},
  year         = {2017},
}

Altmetric
View in Altmetric
Web of Science
Times cited: