Abstract
We attempted to validate the location of sources predicted by magnetoencephalography (MEG) by studying 19 specially designed dipole electrodes implanted in six patients with intractable partial seizures who were undergoing subdural electrode recording. We used a seven-channel magnetometer to measure the magnetic fields produced by passing through the dipoles a 40-microA, 5-msec square-wave pulse followed 40 msec later by a pulse of opposite polarity; 200 pulses were averaged for each magnetometer position. The actual dipole locations were measured from skull radiographs, and we based MEG localization on a spherical head model with the inclusion of volume currents. MEG estimates of the sources were within several centimeters (mean, 1.69 cm) of the measured locations. We conclude that MEG localization was promising.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
