This is a very interesting release from CIT that suggests concrete evidence that electric fields in the brain are not just a byproduct of neural activity, but also influence the firing and synchronization of neurons. It has long been speculated or assumed this is the case, but this adds evidence. The role of the electric field in communications among neurons and the more likely role in their synchronization will likely be further unraveled with similar techniques.
This suggests added importance of the EEG and the dominant frequencies in the brain.
California Institute of Technology (2011, February 7). Neural communication: Weak electrical fields in the brain help neurons fire together. ScienceDaily.
From http://www.sciencedaily.com/releases/2011/02/110202132617.htm