The file spm_hrf contains the modelling-section of the HRF function by
means of a sum of 2 gamma-functions, defined by a p-vector. Can someone
tell me the theory/experiments behind the values of this p-vector. E.g.
the first-value represents the hemodynamic delay, which is set by default
to 6. But how are the other values defined/related to the hemodynamic
delay or other ?
Any help about those 7 values is welcome
Patrick
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