The Brain Signal (image) Trinity College Dublin Share Print E-Mail Caption When a listener understands speech, a strong response signal is seen over the mid back part of their scalp (top row; blue and green waveforms show response at two specific recording locations). When they can't understand (because, for example, the speech is played backwards), the signal completely disappears (bottom row; red and yellow waveforms show the lack of response at the same two specific recording locations). Credit Professor Ed Lalor. Usage Restrictions Please credit Professor Ed Lalor. Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.