Neurophysiological research: EEG and MEG

Electroencephalography (EEG) and magnetoencephalography (MEG) are two techniques that distinguish themselves from other neuroimaging methodologies through their ability to directly measure brain-related activity and their excellent temporal resolution. A large body of research has applied these techniques to investigate auditory hallucinations. Across a variety of approaches, the left superior temporal cortex is consistently reported to be involved in this symptom. Moreover, there is increasing evidence that a failure in corollary discharge, i.e., a neural signal originating in frontal speech areas that indicates to sensory areas that forthcoming thought is self-generated, may underlie the experience of auditory hallucinations.