Phase Locking in Guitar Duets (IMAGE) Frontiers Caption Time-frequency diagrams of the grand average of the phase locking index, averaged across frontal electrodes for leaders and followers during preparatory tempo setting and around coordinated play onsets. Credit Max Plank Institute, Sänger et al. Usage Restrictions CC-BY License Licensed content 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.