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December 10, 2013 Tuesdays at the Espace des sciences with Denis Le Bihan, Doctor and physicist, director of NeuroSpin, Commissariat à l'énergie atomique de Saclay, member of the Academy of Sciences. Showing brain activity applied to a function such as speaking, reading, counting or simply thinking, this is now made possible by recent advances in magnetic resonance imaging, MRI: the keystone of brain research, this technique is based on physical principles that are generally unknown to the general public and that Denis Le Bihan manages to explain in a rigorous and understandable way. Whether it is musical perception, the unconscious processes at the origin of our decisions, the development of the brain in utero, the study of interactions between genes and the environment, the study of anomalies that can be at the origin of certain psychiatric illnesses, the new techniques of "neuro-imaging" open up infinite fields of study and pose new questions to ethics.