Electromagnetic neural source imaging
The quantitative analysis of MEG/EEG sensor data is a source of vast possibilities to characterize time-resolved brain activity. Some studies however may require a more direct assessment of the anatomical origins of the effects detected at the sensor level. It is also likely that some effects may not even be revealed using scalp measures, because of severe mixing and smearing due to the relative large distance from sources to sensors and volume conduction effects.
Electromagnetic source imaging addresses this issue by characterizing these latter elements (the head shape and size, relative position and properties of sensors, noise statistics, etc.) in a principled manner and by suggesting a model for the generators responsible for the signals in the data. Ultimately, models of electrical source activity are produced and need to be analyzed in a multitude of dimensions: amplitude maps, time/frequency properties, connectivity, etc., using statistical assessment techniques. The rest of this chapter details most of the steps required, while skipping technical details, which can be found in the references cited.
Froedtert & The Medical College of Wisconsin MEG Contact Information
Research investigators and clinical physicians are encouraged to contact us for further information on how to access our MEG Program and services.
Zhimin Li, PhD: Technical Manager
Jean Roccapalumba, CTRS, MBA: Program Manager
Department of Neurology
Medical College of Wisconsin
9200 W. Wisconsin Ave.
Milwaukee, WI 53226
MEG Program Site Map
If you are a physician and would like to inquire about or order a MEG study for your patients, please visit Froedtert Hospital MEG web pages for basic information about the procedure and/or contact Linda Allen, RN BSN, our Epilepsy Program Coordinator at (414) 805-3641 to refer your patient to our Program.
If you are a patient who is about to undergo an MEG procedure, please also visit Froedtert Hospital MEG web pages for useful information regarding the MEG routine.