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Magnetoencephalography (MEG)

Magnetoencephalography (MEG) is an imaging technique used to measure the magnetic fields produced by electrical activity in the brain via extremely sensitive devices. Any electrical current will produce a magnetic field; synchronized neuronal currents (the transport of ions that is the basis for brain function) induce weak magnetic fields that can be measured with the very sensitive magnetometers in the MEG machine.

As is the case with EEG, it is thought that the MEG signatures of patients with schizophrenia differs from that of healthy individuals. Characteristics that have been recorded include abniormal delta (0.5-4 Hz) activity during res and a unique increase of beta activity (12.5-30 Hz) among others.

Related Articles:
1)  Rockstroh BS, Wienbruch C, Ray WJ, Elbert T. Abnormal oscillatory brain dynamics in schizophrenia: a sign of deviant communication in neural network? BMC Psychiatry, 2007, 7-4 [link]
2)  Ropohl ACA, et al. Cortical activity associated with auditory hallucinations. Neuroreport. 15(3):523-526, March 1, 2004. [link]
3)  Kissler J. MEG gamma band activity in schizophrenia patients and healthy subjects in a mental arithmetic task and at rest. Clinical Neurophysiology, 111(11):2079-2087. [link]