Put simply – An EEG is a process that detects various kinds of abnormalities in your brain waves. Moreover, an EEG can find specific changes in brain activity that could be useful in evaluating brain disorders such as epilepsy. This very treatment is also used in most of the neurofeedback sessions aimed at reducing anxiety and offering overall relaxation. Furthermore, it is seen as a simple, inexpensive tool that can provide all sorts of information about any changes in the cerebral cortex post-stroke.