Magnetoencephalography (MEG) is a non-invasive technique used to measure magnetic fields generated by small intracellular electrical currents in neurons of the brain. Thus MEG provides direct information about the the dynamics of evoked and spontaneous neural activity and the location of their sources in the brain.
The principal sources of MEG (magnetoencephalogram) and EEG (electroencephalogram) are synchronous synaptic currents in the cerebral cortex. MEG and EEG provide an instantaneous view of neural activity and thus are complementary to fMRI. The combination of MEG/EEG with fMRI provides images of brain activity with high temporal as well as spatial resolution.
Our MEG Core facility is equipped with a Neuromag Vectorview system, comprising 306 MEG channels (2 planar gradiometers and a magnetometer at each of 102 sites) and 128 EEG channels, located within an Imedco magnetically shielded room. Computer-controlled visual, auditory, and somatosensory stimulation systems as well as behavioral response monitoring are available in the laboratory. Our analysis software allows smooth integration of MEG, EEG, anatomical MRI, and fMRI data.