This first volume starts with an overview on current perspectives in genetic research and on the molecular mechanisms of neurodegeneration. This is followed by a selection of hot topics in pathophysiological research, from molecular studies to system-level investigations based on in vivo electrophysiological recordings and neurocomputational methods. Complete overview of hot topics and approaches to current PD research, from molecules, to brain circuits, to clinical and therapeutic applications. Leading authors review the state-of-the-art in their field of investigation, and provide their views and perspectives for future research. All chapters include comprehensive background information and are written in a clear form that is accessible also to the non-specialist.