Are fMRI event-related response constant in time? A model selection answer

  title={Are fMRI event-related response constant in time? A model selection answer},
  author={Sophie Donnet and Marc Lavielle and Jean-Baptiste Poline},
An accurate estimation of the hemodynamic response function (HRF) in functional magnetic resonance imaging (fMRI) is crucial for a precise spatial and temporal estimate of the underlying neuronal processes. Recent works have proposed non-parametric estimation of the HRF under the hypotheses of linearity and stationarity in time. Biological literature suggests, however, that response magnitude may vary with attention or ongoing activity. We therefore test a more flexible model that allows for… CONTINUE READING
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