Observation of a fast response in functional MR.

@article{Ernst1994ObservationOA,
  title={Observation of a fast response in functional MR.},
  author={Thomas Ernst and J{\"u}rgen Hennig},
  journal={Magnetic resonance in medicine},
  year={1994},
  volume={32 1},
  pages={146-9}
}
A spectroscopic MR technique was used to investigate the time course of the MR signal following a single visual stimulus. Gated experiments demonstrate there is an early response (500 ms after stimulus) leading to a reduction of the MR signal by -0.25% (P = 0.02), whereas a slower response (> 1500 ms after stimulus) results in a signal increase of +0.59% (P = 0.01). The fast negative response may be attributed to increased oxygen consumption, followed by a slower vascular response with… CONTINUE READING
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