So called Mild Traumatic Brain Injury (mTBI) has been highlighted particularly in relation to head injuries as it is hard to quantify the severity of the injury and predict the likelihood of significant long term consequences. Whilst this has been in the news in relation to professional sport it is a significant clinical issue for the population at large. Diagnostic imaging has typically not proved reliable in identifying mTBI. We have known for a very long time that the EEG signal reflects the collective electrical activity of neurons firing in the brain even if the functional implications were not understood. Recent work with so called qEEG (Quantitative EEG) is showing promise as a way to correctly discriminate the brain injured person from ‘normals’. This presentation will look at some recent research in this area and the approaches to signal processing that make this area promising.