Journal article

Time-Varying Effective Connectivity during Visual Object Naming as a Function of Semantic Demands

Claudia Poch, Marta I Garrido, Jose Manuel Igoa, Mercedes Belinchon, Irene Garcia-Morales, Pablo Campo

JOURNAL OF NEUROSCIENCE | SOC NEUROSCIENCE | Published : 2015

Abstract

Accumulating evidence suggests that visual object understanding involves a rapid feedforward sweep, after which subsequent recurrent interactions are necessary. The extent to which recurrence plays a critical role in object processing remains to be determined. Recent studies have demonstrated that recurrent processing is modulated by increasing semantic demands. Differentially from previous studies, we used dynamic causal modeling to model neural activity recorded with magnetoencephalography while 14 healthy humans named two sets of visual objects that differed in the degree of semantic accessing demands, operationalized in terms of the values of basic psycholinguistic variables associated w..

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Grants

Awarded by Spanish Ministry of Science and Innovation


Awarded by Ramon y Cajal Fellowship from the Spanish Ministry of Science and Innovation


Awarded by Spanish Ministry of Science and Education


Awarded by Australian Research Council


Awarded by Australian Research council Centre of Excellence for integrative Brain Function (ARC Centre Grant)


Funding Acknowledgements

This work was supported by the Spanish Ministry of Science and Innovation, Grant SAF2011-27920 to I.G.-M., P.C. was supported by a Ramon y Cajal Fellowship from the Spanish Ministry of Science and Innovation (RYC-2010-05748), C.P. was supported by Spanish Ministry of Science and Education (AP2009-4131), and M.I.G. is supported by an Australian Research Council Discovery Early Career Researcher Award (DE1301011393) and the Australian Research council Centre of Excellence for integrative Brain Function (ARC Centre Grant CE140100007).