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Chou, K.L.* ; Stacy, M.* ; Simuni, T.* ; Miyasaki, J.* ; Oertel, W.H. ; Sethi, K.* ; Fernandez, H.H.* ; Stocchi, F.*

The spectrum of "off" in Parkinson's disease: What have we learned over 40 years?

Parkinsonism Relat. Disord. 51, 9-16 (2018)
DOI PMC
Open Access Green as soon as Postprint is submitted to ZB.
The terms "on" and "off" were used by Marsden and his contemporaries over 40 years ago to describe times when Parkinson's disease patients experienced good motor function ("on") and immobility ("off"). Yet there remains no published consensus definition of "off", leading clinicians and patients to develop individualized impressions of "off" determinations. In this paper, we first discuss the evolution of the terminology and understanding of "off" states since Marsden's time, which now include non-motor as well as motor symptoms. We then review pathophysiology and risk factors for the development of "off' states as well as tools to detect the "off" state, before proposing a practical definition of "off" for consideration. A common, practical definition of the "off" state could improve clinical recognition of "off' symptoms and lead to significant benefit for patients.
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Publication type Article: Journal article
Document type Review
Corresponding Author
Keywords Off ; Wearing Off ; Motor Fluctuations ; Motor Complications ; Non-motor Fluctuations ; Parkinson's Disease; Duodenal Levodopa Infusion; Nonmotor Wearing-off; Motor Fluctuations; L-dopa; Extracellular Dopamine; Patient Questionnaire; Cognitive Impairment; Clinical-features; Amino-acids; Therapy
ISSN (print) / ISBN 1353-8020
e-ISSN 1873-5126
Quellenangaben Volume: 51, Issue: , Pages: 9-16 Article Number: , Supplement: ,
Publisher Elsevier
Publishing Place The Boulevard, Langford Lane, Kidlington, Oxford Ox5 1gb, Oxon, England
Non-patent literature Publications
Reviewing status Peer reviewed