| Olimpico, Francesco | Fondazione Pisana per la Scienza ONLUS, San Giuliano Terme, Italy | From development to disease – how astrocyte heterogeneity sculpts the brain |
| Oliver, Peter | MRC Harwell Institute, Harwell Campus, UK. | Building cortical circuits: one gene, one protein, one cell at the time |
| Orefice, Martina | Department of Biology, University of Pisa, Italy | Different strategies to untangle the neurobiology of psychiatric disorders |
| Ori, Michela | Department of Biology, University of Pisa, Italy | Different strategies to untangle the neurobiology of psychiatric disorders Presenter |
| Ortombina, Sandra | University of Verona, Italy | Periphery-CNS miscommunication in neurodegeneration: focus on brain barriers |
| Ottoboni, Linda | University of Milan, Italy | Gene therapy and MNDs: from preclinical validation to clinical application Presenter |