¥ First: Block-trial FMRI data
H ÒActivationÓ occurs over a sustained
period of time (say, 10 s or
longer), usually from more than one stimulation event, in
rapid succession
H BOLD (hemodynamic) response accumulates from multiple close
activations and is large
H BOLD response is often visible in time
series
¥ Next 4 slides: same brain voxel in 9 imaging runs
H black curve (noisy) = data
H red curve (above data) = ideal model
response
H blue curve (within data) = model fitted
to data
H somatosensory task (finger being
rubbed)
¥