title: On the relationship between side of onset and cognition in Parkinson disease.
abstract: We read with interest the article of Pellicano et al. who evaluated whether the side of onset of Parkinson disease (PD) influences cognitive and neuropsychiatric symptoms in a cohort of early, untreated patients. They results are commented on and put into the context of previously published research.
authors.affiliation: Sobell Department of Motor Neuroscience and Movement Disorders, UCL Institute of Neurology, London, United Kingdom; Dipartimento di Scienze Neurologiche e del Movimento, Università di Verona, Verona, Italy. Electronic address: erro.roberto@gmail.com.
authors.forename: Roberto
authors.initials: R
authors.lastname: Erro
authors.affiliation: University of Naples "Federico II", Department of Neurological Science, Naples, Italy.
authors.forename: Emanuele
authors.initials: E
authors.lastname: Spina
authors.affiliation: University of Salerno, Center for Neurodegenerative Disease - CEMAND, Salerno, Italy.
authors.forename: Paolo
authors.initials: P
authors.lastname: Barone
authors.affiliation: University of Salerno, Center for Neurodegenerative Disease - CEMAND, Salerno, Italy.
authors.forename: Maria Teresa
authors.initials: MT
authors.lastname: Pellecchia
mesh_terms: D003072:Cognition Disorders / Q000453:epidemiology* / Q000209:etiology*; D005260:Female; D007839:Functional Laterality / Q000502:physiology*; D006801:Humans; D008297:Male; D001523:Mental Disorders / Q000453:epidemiology* / Q000209:etiology*; D010300:Parkinson Disease / Q000150:complications*
keywords: Anxiety; Cognitive dysfunction; De novo; Depression; Mood; PD; Parkinson disease; Side of onset