Magnetic auditory evoked fields: dipole orientation

Electroencephalography and Clinical Neurophysiology
J T ZimmermanJ E Zimmerman

Abstract

Magnetic auditory evoked fields (MAEFs) were recorded from the left hemisphere of 7 normal human subjects in response to 512 binaural click stimuli. The instrument was a figure-eight SQUID gradiometer that measured the transverse gradient of the field perpendicular to the scalp. Its response to a current dipole source inside the head was a cosine function of the angular orientation of the gradiometer about an axis perpendicular to the scalp. Measurements were made at various orientations from which were derived the orientation of the equivalent dipole source. Our findings suggest that when considering total magnetic energy, current dipoles in the vicinity of the transverse gyri of Heschl, whose primary orientation are approximately perpendicular to the sylvian fissure, appear to be the major contributors to the magnetic fields produced by click stimuli.

References

Jul 1, 1978·Electroencephalography and Clinical Neurophysiology·M ReiteJ E Zimmerman
Jul 1, 1980·Electroencephalography and Clinical Neurophysiology·D E FarrellT J Teyler
Apr 1, 1981·Electroencephalography and Clinical Neurophysiology·M ReiteJ E Zimmerman

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Citations

Jun 1, 1982·Electroencephalography and Clinical Neurophysiology·M ReiteJ E Zimmerman
Aug 1, 1982·Electroencephalography and Clinical Neurophysiology·M ReiteJ E Zimmerman
Sep 1, 1991·Electroencephalography and Clinical Neurophysiology·L KaufmanJ Z Wang
Jun 1, 1984·Electroencephalography and Clinical Neurophysiology·N Perrault, T W Picton
May 1, 1990·Electroencephalography and Clinical Neurophysiology·R L RogersH M Eisenberg
Mar 17, 2007·NeuroImage·Eero PekkonenMaria Arvio
Dec 1, 1982·The Review of Scientific Instruments·G L RomaniL Kaufman
Jan 1, 1983·The International Journal of Neuroscience·G W Lewis
May 3, 2001·Journal of Child Neurology·H Otsubo, O C Snead
Oct 22, 1981·Nature·H Stowell

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