Prof. Costas Papatheodoropoulos is a Professor of Physiology-Neurophysiology in the Department of Medicine at the University of Patras, Greece. He graduated in Biology from the University of Patras and received his Ph.D. in Neuroscience from the Medical School of the same university. He worked as a post-doc fellow at the Unite 109, Centre Paul Broca, INSERM, Paris in 1997–1998, and then taught neuropharmacology at the University of Thessaly, Greece. Since 2001 he has been working at the University of Patras as a Lecturer (2001–2006), Assistant Professor (2006–2012), Associate Professor (2013–2017), and currently Professor. His research group uses the in vitro rat hippocampal slice preparation and electrophysiological techniques to study synaptic transmission, synaptic plasticity, neuronal excitability and neuronal synchronization. The most important scientific contributions of his research are the revealing of intrinsic neuronal circuitry diversification along the longitudinal axis of the hippocampus and the discovery of an in vitro model of sharp wave-ripples, which is a fundamental physiological rhythm of the hippocampus. His current research is focused on the diverse actions of various neuromodulators along the longitudinal axis of the hippocampus. Furthermore, his research group has recently made a significant contribution by identifying local compensatory mechanisms in the ventral hippocampus in an animal model of the neurodevelopmental disorder Fragile X Syndrome (FXS).