Norbert Hájos is the Group Leader of the Network Neurophysiology Laboratory at the Institute of Experimental Medicine, HAS. The lab is most interested in the cellular and synaptic mechanisms underlying the neuronal network operation in the cortical areas. Our main goal is to uncover the principles of information processing in cortical microcircuits at cellular and network levels. To this end, we examine the features of the connections among neurons using neuroanatomy, electrophysiology, imaging techniques and optogenetic approaches.