This post contains info on Magnetoencephalography (MEG)
From my reading here is some stuff which i wish to highlight:
This method maps brain activity by measuring the magnetic field which produce by electriccurrents which occur in the brain, as opposed to the voltage fluctuation resulting from this current (EEG). An active neuron creates a potention which generates a current that flows along the neuron, this current produces a magnetic field, which is too small measure. However due to scynchronised activiate and many nuerons all passing this current a large enough results field in produced which can be measured and used to follow the brains activity.
The use of EEGs has some benefits compared to fMRI:
-MEG is far more expenisive, i.e. cost of equipment
- Device a lot more larger thant the headset for the EEG. Far too large for a project such as ours and for the lab.
Heres a link to someuseful info: http://www.nmr.mgh.harvard.edu/martinos/research/technologiesMEG.php
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