Originally setting out to be a clinical psychologist, Professor Nussbaum instead followed a radically different approach to understanding behaviour that was afforded by a third-year undergraduate course entitled “Molecular Psychobiology”. Following graduate school, he retrained as a clinician and worked within a forensic setting doing both clinical work and research.  Professor Nussbaum was continuously struck by the absence of behavioural neuroscience in the forensic area and conducted both my clinical and research within a behavioural neuroscience framework. Since coming to UTSC in 2005, he has sought to extend his research focus to the sub-clinical regions showing a) the dimensional as opposed to categorical nature of clinical entities and b) the applicability of neurobiological models to behaviours of clinical interest and c) the advantages of re-conceptualizing behaviour to accommodate behavioural neuroscience.