Commentary 1 fMRI connectivity, meaning and empiricism Comments on: Roebroeck at al. The identification of interacting networks in the brain using fMRI: model selection, causality and deconvolution OLIVIER DAVID Inserm, U836, Grenoble Institut des Neurosciences, Grenoble, France Université Joseph Fourier, Grenoble, France Olivier David Grenoble Institut des Neurosciences – Inserm U836 CHU Grenoble – Bât EJ Safra – BP 170 38042 Grenoble Cedex 9, France Tel: +33 456520586 Fax: +33 456520598 Email odavid@ujf-grenoble.fr September 2009 inserm-00517189, version 1 - 1 Aug 2011 Author manuscript, published in "NeuroImage 2011;58(2):306-9; author reply 310-1" DOI : 10.1016/j.neuroimage.2009.09.073