SEATTLE--(BUSINESS WIRE)--The Allen Institute for Brain Science, a nonprofit medical research organization dedicated to advancing understanding of the human brain, has appointed world-renowned neuroscientist Christof Koch, Ph.D. as Chief Scientific Officer. Dr. Koch joins the Allen Institute after a 25-year tenure at the California Institute of Technology (Caltech), where he established himself as a recognized expert in the fields of biophysics, neural computation and neural systems.