Does stimulus quality affect the physiologic MRI responses to brief visual activation?

@article{Krueger1999DoesSQ,
  title={Does stimulus quality affect the physiologic MRI responses to brief visual activation?},
  author={Gunnar Krueger and P. Fransson and Klaus-Dietmar Merboldt and Jens Frahm},
  journal={Neuroreport},
  year={1999},
  volume={10 6},
  pages={1277-81}
}
We studied the effect of stimulus quality on the basic physiological response characteristics of oxygenation-sensitive MRI signals. Paradigms comprised a contrast-reversing checkerboard vs. darkness or vs. gray light as well as gray light vs. darkness in a 2 s/52 s protocol (nine subjects). MRI was performed at 2.0 T using single-shot gradient-echo EPI (TR/TE = 500/54 ms, flip angle 30 degrees). All paradigms elicited almost identical signal intensity time courses comprising a latency period (1… CONTINUE READING

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