Dependence of the MEG on dipole orientation in the rabbit head.

  title={Dependence of the MEG on dipole orientation in the rabbit head.},
  author={J. R. Melcher and David S. Cohen},
  journal={Electroencephalography and clinical neurophysiology},
  volume={70 5},
In theory, a radial current dipole in a conducting sphere produces zero magnetic field outside the sphere, while a tangential dipole produces a non-zero field. Because the heads of humans and some animals resemble a conducting sphere, it follows that the magnetic field due to a radial dipole in these heads should be suppressed compared to that due to a tangential dipole. This hypothesis, which is important in the interpretation of the MEG, has never been experimentally tested. We here present a… CONTINUE READING


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