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@ARTICLE{Zeng:835109,
      author       = {Zeng, Hang and Weidner, Ralph and Fink, Gereon R. and Chen,
                      Qi},
      title        = {{N}eural correlates underlying the attentional spotlight in
                      human parietal cortex independent of task difficulty},
      journal      = {Human brain mapping},
      volume       = {38},
      number       = {10},
      issn         = {1065-9471},
      address      = {New York, NY},
      publisher    = {Wiley-Liss},
      reportid     = {FZJ-2017-04977},
      pages        = {4996–5018},
      year         = {2017},
      abstract     = {Changes in the size of the attentional focus and task
                      difficulty often co-vary. Nevertheless, the neural processes
                      underlying the attentional spotlight process and task
                      difficulty are likely to differ from each other. To
                      differentiate between the two, we parametrically varied the
                      size of the attentional focus in a novel behavioral paradigm
                      while keeping visual processing difficulty either constant
                      or not. A behavioral control experiment proved that the
                      present behavioral paradigm could indeed effectively
                      manipulate the size of the attentional focus per se, rather
                      than affecting purely perceptual processes or surface
                      processing. Imaging results showed that neural activity in a
                      dorsal frontoparietal network, including right superior
                      parietal cortex (SPL), was positively correlated with the
                      size of the attentional spotlight, irrespective of whether
                      task difficulty was constant or varied across different
                      sizes of attentional focus. In contrast, neural activity in
                      the ventral frontoparietal network, including the right
                      inferior parietal cortex (IPL), was positively correlated
                      with increasing task difficulty. Data suggest that
                      sub-regions in parietal cortex are differentially involved
                      in the attentional spotlight process and task difficulty:
                      while SPL was involved in the attentional spotlight process
                      independent of task difficulty, IPL was involved in the
                      effect of task difficulty independent of the attentional
                      spotlight process},
      cin          = {INM-3},
      ddc          = {610},
      cid          = {I:(DE-Juel1)INM-3-20090406},
      pnm          = {572 - (Dys-)function and Plasticity (POF3-572)},
      pid          = {G:(DE-HGF)POF3-572},
      typ          = {PUB:(DE-HGF)16},
      pubmed       = {pmid:28653792},
      UT           = {WOS:000417002000014},
      doi          = {10.1002/hbm.23709},
      url          = {https://juser.fz-juelich.de/record/835109},
}