In this edited volume, experts on the treatment of dementia associated with Parkinson's Disease (PD) describe in detail the current status of knowledge in their respective area of expertise. The importance and clinical relevance of cognitive impairment and dementia in PD is emphasized, all relevant aspects including epidemiology, full and detailed spectrum of clinical features, current knowledge on pathology, neurochemistry and genetics, findings in auxillaryinvestigations, relation to other neurodegenerative disorders, diagnostic process and management are described, rounded-up by discussion of future research directions and expectations. The text is complemented and enriched with tables, figures and is heavily referenced thereby capturing all relevantliterature.

1 Murat Emre: Introduction; 2 Dag Aarsland and Alexandra Bernadotte: Epidemiology of dementia associated with Parkinson's disease; 3 Murat Emre: General features, mode of onset and course of dementia in Parkinson's disease; 4 Kolbjorn Bronnick: Cognitive profile in Parkinson's disease dementia; 5 Eugenia Mamikonyan and Daniel Weintraub: Neuropsychiatric symptoms in Parkinson's disease dementia; 6 Paolo Barone and Gabriella Santangelo: Interaction between affect and executive functions in Parkinson's disease; 7 David J. Burn and Alison J. Yarnall: Motor symptoms and phenotype in patients with Parkinson's disease dementia; 8 J. M. Hausdorff, J. Zitser, A. Mirelman and N. Giladi: Interaction between cognition and gait in patients with Parkinson's disease; 9 Eduardo Tolosa Judith Navarro-Otano and Alex Iranzo: Disorders of sleep and autonomic function in Parkinson's disease dementia; 10 Gordon W Duncan, Michael J Firbank and John T O'Brien: Structural and functional neuroimaging in patients with Parkinson's disease dementia; 11 Guido Alves, Kenn Freddy Pedersen, Jan Petter Larsen: Biomarkers for cognitive impairment and dementia in Parkinson's disease; 12 Yasuyuki Okuma and Yoshikuni Mizuno: Electrophysiological and other auxiliary investigations in patients with Parkinson's disease dementia; 13 Rita Guerreiro and Andrew Singleton: Genetic basis of dementia in Parkinson's disease; 14 David Whitfield, Margaret Ann Piggott, Elaine K. Perry and Paul T Francis: Neurochemical pathology of Parkinson's disease dementia and dementia with Lewy bodies; 15 Gonzalo J. Revuelta, Guttalu K Kumaraswamy and Carol F. Lippa: Pathological correlates of dementia in Parkinson's disease; 16 Elise Caccappolo and Karen Marder: Epidemiology, diagnosis and correlates of Mild Cognitive Impairment in Parkinson's disease; 17 SE Winder-Rhodes , RA Barker, CH Williams-Gray: The pathophysiological and prognostic heterogeneity of Mild Cognitive Impairment in Parkinson's disease; 18 Clive Ballard, Sara Garcia-Ptacek , Inger van Steenoven, Dag Aarsland: Spectrum of Lewy body dementias: relationship of Parkinson's disease dementia to dementia with Lewy bodies; 19 Jaime Kulisevsky and Javier Pagonabarraga: Spectrum of disorders with dementia and Parkinsonism; 20 Murat Emre: Diagnosis of dementia in Parkinson's disease; 21 Ian McKeith and Murat Emre: Management of Parkinson's disease, dementia and dementia with Lewy bodies; 22 John Hardy: Parkinson's disease: what will the future bring?