The 'Pacemaker' Channel (IMAGE) Rockefeller University Caption This image shows how a response is reversed. Credit Laboratory of Molecular Neurobiology and Biophysics/The Rockefeller University Usage Restrictions Image may be used only to illustrate the research described in the accompanying release. 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.