Affiliation:
1. Central Clinical School, Faculty of Medicine and Health, University of Sydney, NSW Australia
2. Parkinson’s Disease Research Clinic, Brain and Mind Centre, University of Sydney, NSW, Australia
Abstract
Abstract
Fluctuating cognition is a complex and disabling symptom that is seen most frequently in the context of Lewy body dementias encompassing dementia with Lewy bodies and Parkinson’s disease dementia. In fact, since their description over three decades ago, cognitive fluctuations have remained a core diagnostic feature of dementia with Lewy bodies, the second most common dementia in the elderly. In the absence of reliable biomarkers for Lewy body pathology, the inclusion of such patients in therapeutic trials depends on the accurate identification of such core clinical features. Yet despite their diagnostic relevance, cognitive fluctuations remain poorly understood, in part due to the lack of a cohesive clinical and scientific explanation of the phenomenon itself. Motivated by this challenge, the present review examines the history, clinical phenomenology and assessment of cognitive fluctuations in the Lewy body dementias. Based on these data, the key neuropsychological, neurophysiological and neuroimaging correlates of cognitive fluctuations are described and integrated into a novel testable heuristic framework from which new insights may be gained.
Funder
Brain and Mind Centre University of Sydney
NHMRC Dementia Team
National Health and Medical Research Council
Australian and New Zealand Association of Neurologists
Publisher
Oxford University Press (OUP)
Cited by
52 articles.
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