Spiking neuron circuit model (IMAGE) City University of Hong Kong Caption Illustration of spiking neuron circuit model underlying the rhythmic defecation behaviour Credit Dr Liu Qiang/ City University of Hong Kong Usage Restrictions Image must be used with appropriate caption and credit 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.