Thanks for your reply, Gang.

Basically, the experiment is that a subject is shown dots of light on a screen either to the left, or to the right while an fMRI scan is taken.

The timing sequence that I'm using are the times at which the dot of light appeared on the left side of the screen. I'm trying to deconvolve the time series for a particular voxel by the time series of the "left-hand side light". The TR is 2.5 seconds. We're trying to see whether the HRF for a patient subject would differ from the HRF of a normal subject when tested for the same type of setup.

The main thing that confuses me about the results I got from the deconvolution after using 8 tent functions were the graphs. What am I supposed to do with the 8 graphs? According to slides 5 and 6 on the pdf-- am I supposed to add these 8 graphs together to get a final HRF response?


-Alice