Welcome to the Human Emotion Systems laboratory at Turku PET centre and Department of Psychology, University of Turku. Our goal is to unravel the neurochemical and functional mechanisms that guide human social behaviours such as emotions, understanding others’ minds and establishing long-term social bonds. We focus on the brain basis of interpersonal emotions and social cognition, and study naturalistic social interactions under one and two-person settings. We measure brain function with fMRI, PET and MEG but do also behavioural work using e.g. eye tracking. We are currently funded by the Academy of Finland and the European Research Council. The laboratory is led by Lauri Nummenmaa.