Dear SPM-users
We are looking at data from an experiment with
transient happenings that are modeled with
events. When selecting hrf-convolution, there are
also options to add a time-derivative of the hrf.
What are the reasons for this (any references)?
Wouldn’t it be more reasonable to use a
time-derivative of the hrf together with a
time-derivative of the BOLD-signal in order to remove sustained effects?
Thank you in advance
Sincerely
Micael Andersson
Department of Integrative Medical Biology, IMB
Section for Physiology
Umeå university
SE-901 87 Umeå
SWEDEN
Email : [log in to unmask]
TEL: +46 (0)90 7865186-25
FAX: +46 (0)90 7866683
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