There is this research group from University of Jerusalem working on the oscillatory dynamic of electrophysiological brain activity. They call a complete branch of research into question, the so-called induced gamma brain response (iGBR).
Masses of papers have been published on this topic, some scientists build their carreer mainly on the investigation of the contribution of this iGBR to brain functions.
The group behind Schlomit Yuval-Greenberg shows with very elegant studies, that this iGBR is strongly affected by (saccadic) eye muscle activity and can mainly be expained by the characteristics of this source of disturbance. So fast involuntary eye movement cause fast fluctuations in the electrical brain activity.
The critique that the GBR might be contaminated by electical activity from other sources than the brain is not new. But it was never shown so effectively before.
Seems as if some brain scientists ride a dead horse.
Reference: Shlomit Yuval-Greenberg & Leon Y Deouell. (2010), Scalp-Recorded Induced Gamma-Band Responses to Auditory Stimulation and Its Correlations with Saccadic Muscle-Activity. Brain Topography, July 28. [Epub ahead of print], http://www.ncbi.nlm.nih.gov/pubmed/20665099