Stronger occipital cortical activation to lower than upper visual field stimuli Neuromagnetic recordings

@article{Portin1999StrongerOC,
  title={Stronger occipital cortical activation to lower than upper visual field stimuli Neuromagnetic recordings},
  author={K. Portin and Simo Vanni and Veijo Virsu and Riitta Hari},
  journal={Experimental Brain Research},
  year={1999},
  volume={124},
  pages={287-294}
}
 We recorded whole-scalp magnetoencephalographic (MEG) responses to black-and-white checkerboards to study whether the human cortical responses are quantitatively similar to stimulation of the lower and upper visual field at small, 0–6°, eccentricities. All stimuli evoked strongoccipital responses peaking at 50–100 ms (mean 75 ms). The activation was modeled with a single equivalent current dipole in the contralateral occipital cortex, close to the calcarine fissure, agreeing with an activation… CONTINUE READING