Discovering networks altered by potential threat ("anxiety") using quadratic discriminant analysis.
Discovering networks altered by potential threat ("anxiety") using quadratic discriminant analysis.
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DOI:
10.1016/j.neuroimage.2015.05.002
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发表时间:
2015-08-01
期刊:
影响因子:
5.7
通讯作者:
Pessoa L
中科院分区:
文献类型:
--
作者:
McMenamin BW;Pessoa L
Researchers have only recently begun using functional neuroimaging to explore the human response to periods of sustained anxious anticipation, namely potential threat. Here, we investigated brain responses acquired with functional MRI during an instructed threat of shock paradigm used to create sustained periods of aversive anticipation. In this re-analysis of previously published data, we employed Quadratic Discriminant Analysis to classify the multivariate pattern of whole-brain functional connectivity and to identify connectivity changes during periods of potential threat. Our method identifies clusters with altered connectivity on a voxelwise basis, thus eschewing the need to define regions a priori. Classifier generalization was evaluated by testing on data from participants not used during training. Robust classification between threat and safe contexts was possible, and inspection of “diagnostic features” revealed altered functional connectivity involving the intraparietal sulcus, task-negative regions, striatum, and anterior cingulate cortex. We anticipate that the proposed method will prove useful to experimenters wishing to identify large-scale functional networks that distinguish between experimental conditions or groups.
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DOI:
10.1038/npp.2009.109
发表时间:
2010-01
期刊:
Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology
影响因子:
--
作者:
通讯作者:
--
影响因子:
5.7
作者:
Hahn, Andreas;Stein, Patrycja;Lanzenberger, Rupert
通讯作者:
Lanzenberger, Rupert
影响因子:
5.7
作者:
Alvarez RP;Chen G;Bodurka J;Kaplan R;Grillon C
通讯作者:
Grillon C
影响因子:
3.3
作者:
Craddock, R. Cameron;Holtzheimer, Paul E., III;Hu, Xiaoping P.;Mayberg, Helen S.
通讯作者:
Mayberg, Helen S.
影响因子:
5.7
作者:
Destrieux, Christophe;Fischl, Bruce;Dale, Anders;Halgren, Eric
通讯作者:
Halgren, Eric