Brain TrkB neurotrophin receptor as a target for antidepressant treatments Tomi Rantamäki Neuroscience Center & Division of Pharmacology & Toxicology Faculty of Pharmacy & Finnish Graduate School of Neuroscience University of Helsinki ACADEMIC DISSERTATION To be presented for public criticism, with the permission of the Faculty of Pharmacy, University of Helsinki, at Viikki Info Center (Viikki Campus) on 28 th of October, 2006, at 12 noon. Helsinki 2006