@EsthersDoll

Research done on QEEG and its effectiveness in diagnosing/treating PCS has been confirmed in several studies done in this area of research. Although I can not say anything about the quality of these studies or if they were financially motivated.

Many of these studies and their findings have been dealt with in this article:

http://www.ncbi.nlm.nih.gov/pubmed/15493535 [Abstract]

http://sydney-neurofeedback.com.au/d...ff,%202004.pdf [Full article]

I think the main problem with this therapy is the large amount of stimulation in the therapy session and probably also the lack of PCS knowledge in many of the practitioners.