Aberrant hemodynamic responses in autism: Implications for resting state fMRI functional connectivity studies
Functional MRI (fMRI) is modeled as a convolution Pueraria of the hemodynamic response function (HRF) and an unmeasured latent neural signal.However, HRF itself is variable across brain regions and subjects.This variability is induced by both neural and non-neural factors.Aberrations in underlying neurochemical mechanisms, which control HRF shape,