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Frailty is the most problematic expression of population ageing. It is a state of vulnerability to poor resolution of homoeostasis after a stressor event and is a consequence of cumulative decline in many physiological systems during a lifetime. This cumulative decline depletes homoeostatic reserves until minor stressor events trigger disproportionate(More)
BACKGROUND Alzheimer's disease (AD) pathology is common in patients with amnestic mild cognitive impairment (aMCI) without dementia, but the prevalence of AD pathology in patients with subjective cognitive impairment (SCI) and non-amnestic mild cognitive impairment (naMCI) is unknown. AD is characterised by decreased CSF concentrations of Abeta(42) and(More)
Cerebral autoregulation (CA) refers to the properties of the brain vascular bed to maintain cerebral perfusion despite changes in blood pressure (BP). Whereas classic studies have assessed CA during changes in BP that have a gradual onset, dynamic studies quantify the fast modifications in cerebral blood flow (CBF) in relation to rapid alterations in BP.(More)
BACKGROUND Amyloid beta(40) (Abeta(40)) is the most abundant Abeta peptide in the brain. The cerebrospinal fluid (CSF) level of Abeta(40) might therefore be considered to most closely reflect the total Abeta load in the brain. Both in Alzheimer's disease (AD) and in normal aging the Abeta load in the brain has a large inter-individual variability. Relating(More)
IMPORTANCE Increasing evidence suggests a relationship between poor sleep and the risk of developing Alzheimer disease. A previous study found an effect of sleep on β-amyloid (Aβ), which is a key protein in Alzheimer disease pathology. OBJECTIVE To determine the effect of 1 night of total sleep deprivation on cerebrospinal fluid Aβ42 protein levels in(More)
OBJECTIVE To determine the effectiveness of community based occupational therapy on daily functioning of patients with dementia and the sense of competence of their care givers. DESIGN Single blind randomised controlled trial. Assessors were blinded for treatment allocation. SETTING Memory clinic and day clinic of a geriatrics department and(More)
BACKGROUND We aimed to identify the most useful definition of the "cerebrospinal fluid Alzheimer profile," based on amyloid-ß1-42 (Aβ42), total tau, and phosphorylated tau (p-tau), for diagnosis and prognosis of Alzheimer's disease (AD). METHODS We constructed eight Alzheimer profiles with previously published combinations, including regression formulas(More)
With aging, the content of self-reported autobiographical memories shifts from episodic to semantic. Onset of Alzheimer's disease enhances this pattern, but the neural underpinnings of this change in Autobiographical Memory (AM), in particular the role of hippocampal degradation, are unknown. We employed fMRI contrasting autobiographical and semantic(More)
BACKGROUND The recently introduced diagnostic label of Mild Cognitive Impairment (MCI) identifies patients with a cognitive decline that is more pronounced than is usual for a person's age and educational level but does not notably interfere with activities of daily living (ADL). The natural course of the syndrome is uncertain although MCI sufferers have a(More)