Unmasking of cortical SEP components by changes in stimulus rate: a topographic study.

@article{Larrea1992UnmaskingOC,
  title={Unmasking of cortical SEP components by changes in stimulus rate: a topographic study.},
  author={L Garc{\'i}a Larrea and H{\'e}l{\`e}ne Bastuji and François Maugui{\`e}re},
  journal={Electroencephalography and clinical neurophysiology},
  year={1992},
  volume={84 1},
  pages={71-83}
}
We performed topographic mapping of somatosensory responses to median nerve stimulation delivered at 2, 5 and 10 Hz. Parietal N20 was significantly attenuated in 10 Hz somatosensory evoked potentials (SEPs), while central P22 diminished between 2 and 5 Hz, remaining stable thereafter. The single component most affected by increasing stimulus rate was N30, which abated by more than 50% in 10 Hz SEPs, as compared with basal responses. N30 attenuation disclosed the existence of an earlier negative… CONTINUE READING

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