The second MicMac workshop on the use of microelectrodes in the study of epilepsy and human cognition was held at the Pavillon Baudot on March 9 and 10, 2023. Organized by Emmanuel Barbeau, Jonathan Curot, Leila Reddy and Luc Valton from CerCo, this meeting welcomed about sixty people from all over France, both on site and in remote mode.