fMRI signal + - Neurometrika

Stimulus timing convolved with the“canonical” HRF...One can use the “Finite Impulse Response (FIR)”model to estimate the HRF individually: for eachvoxel in the brain, for each stimulus type, for eachsubject.In practice, full FIR analysis is rarely done. Butestimating the dispersion and delay of the HRFindividually on a voxel basis, and then treating thoseas “covariates of no interest”, is more commonlyuseful.