Publications by authors named "Cees Jonker"

Behavioral changes are commonly observed in patients with dementia and can lead to criminal offenses, even without a history of criminal or antisocial behavior. Due to the growth of the aging population, this poses a rising problem to deal with for the criminal justice system and in general for society. Criminal behavior may include minor crimes such as theft or traffic violations, but also serious crimes such as physical abuse, sexual offense, or murder.

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Objective: Amygdalohippocampectomy (AHE) is the resective surgery for medically intractable mesial temporal lobe epilepsy. To date no study has investigated a wide range of neuropsychiatric symptoms in right AHE outpatients.

Patients And Methods: Three patients with right AHE participated in this study.

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The orbitofrontal cortex (OFC) plays a crucial role in behavior and is a common site for damage due to different types of injuries, e.g., closed head injuries, cerebrovascular accidents, tumors, neurosurgical interventions.

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Objective: Motivational aspects, emotional factors, and cognition, all of which require intact cognitive functioning may be essential in sexual functioning. However, little is known about the association between cognitive functioning and sexual behavior. The aim of this article is to review the current evidence for the influence of cognitive functioning on sexual behavior in normal aging and dementia.

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Objectives: Investigating whether cognitive functioning is associated with the perception of one's sexuality in old age.

Design: Cross-sectional analysis, using observation cycle 2005/2006 of the population-based prospective cohort of the Longitudinal Aging Study Amsterdam.

Setting: Municipal registries in three Dutch regions.

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Background: Known risk factors for Alzheimer's disease and other dementias include medical conditions, genetic vulnerability, depression, demographic factors and mild cognitive impairment. The role of feelings of loneliness and social isolation in dementia is less well understood, and prospective studies including these risk factors are scarce.

Methods: We tested the association between social isolation (living alone, unmarried, without social support), feelings of loneliness and incident dementia in a cohort study among 2173 non-demented community-living older persons.

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Unlabelled: Inflammatory mechanisms, like microglial activation, could be involved in the pathogenesis of Alzheimer's disease (AD). (R)-[(11)C]PK11195 (1-(2-chlorophenyl)-N-methyl-N-1(1-methylpropyl)-3-isoquinolinecarboxamide), a positron emission tomography (PET) ligand, can be used to quantify microglial activation in vivo. The purpose of this study was to assess whether increased (R)-[(11)C]PK11195 binding is present in AD and mild cognitive impairment (MCI), currently also known as "prodromal AD.

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Objectives: To gain insight into how advance directives for euthanasia affect resident care in Dutch nursing homes.

Design: Survey of elderly care physicians and additional qualitative interviews with a selection of elderly care physicians and relatives of people with dementia who had an advance directive for euthanasia.

Setting: Dutch nursing home practice.

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We examined the associations between extracerebral markers of cholesterol homeostasis and cognitive decline over 6 years of follow-up, and studied the modifying effect of apolipoprotein E (ApoE) e4. Data were collected in the Longitudinal Aging Study Amsterdam (n = 967, with longitudinal data on cognition, ages ≥ 65 years) and analyzed using linear mixed models. General cognition (Mini-Mental State Examination; MMSE), memory (Auditory Verbal Learning Test), and information processing speed (Coding task) were measured.

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Healthy brain aging is characterized by neuronal loss and decline of cognitive function. Neuronal loss is closely associated with microglial activation and postmortem studies have indeed suggested that activated microglia may be present in the aging brain. Microglial activation can be quantified in vivo using (R)-[(11)C]PK11195 and positron emission tomography.

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Objective: To obtain insight into current practices regarding compliance with advance directives for euthanasia (ADEs) in cases of incompetent patients with dementia in Dutch nursing homes, in light of the legal possibility offered by the new euthanasia law to perform euthanasia in these cases.

Methods: A written questionnaire was completed by 434 elderly care physicians (ECPs).

Findings: Over the years 2005-2006, many ECPs took care of patients with dementia and an ADE, actual life termination of these patients took place very rarely and never in incompetent patients.

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The aim of this study was to examine the associations between high-density lipoprotein (HDL) and low-density lipoprotein (LDL) cholesterol, triglycerides, and cognition and focus on the modifying effect of inflammation. Data were collected in the population-based Longitudinal Aging Study Amsterdam and analyzed with mixed linear models. The sample comprised 1003 persons ≥ 65 years with cognitive data on at least 2 occasions over 6 years of follow-up.

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Objective: The need for information about the disease and coping with the consequences, as well as on available care and welfare services, is frequently unmet in people with dementia and their carers. To provide carers of community-dwelling people with dementia with tailored information, the DEMentia-specific dynamic interactive social chart (DEM-DISC) was developed. The impact on the daily life of people with dementia and their carers, the user friendliness and usefulness of a first prototype of DEM-DISC was evaluated.

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Aim: To evaluate previously developed classification models to make implementation in primary care possible and aid early identification of persons at risk for dementia.

Methods: Data were drawn from the OCTO-Twin study. At baseline, 521 persons >or= 80 years of age were nondemented, and for 387 a blood sample was available.

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Background: Although advance directives may seem useful instruments in decision-making regarding incompetent patients, their validity in cases of dementia has been a much debated subject and little is known about their effectiveness in practice. This paper assesses the contribution of advance directives to decision-making in the care of people with dementia, with a special focus on non-treatment directives and directives for euthanasia.

Methods: The relevant problems from the ethical debate on advance directives in cases of dementia are summarized and we discuss how these relate to what is known from empirical research on the validity and effectiveness of advance directives in the clinical practice of dementia care.

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Background: The aging society will bring an increase in the number of people with dementia living in the community. This will mean a greater demand on care and welfare services to deliver efficient and customized care, which requires a thorough understanding of subjective and objective care needs. This study aims to assess the needs of community-dwelling people with dementia as reported by themselves and by their informal carers.

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Objectives: This study investigates whether, and if so how, anxiety symptoms are related to cognitive decline in elderly persons and whether anxiety symptoms precede cognitive decline.

Method: Data were obtained from the Longitudinal Aging Study Amsterdam. Anxiety symptoms were measured with the Hospital Anxiety and Depression Scale.

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Background: Tailor-made care in dementia requires an individual needs assessment. The Camberwell Assessment of Need for the Elderly (CANE) was developed to assess needs of older people with mental disorders. In this study the validity and reliability of the Dutch version of the CANE were studied among community-dwelling persons with dementia and their informal carers.

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Objective: The aim of this study was to demonstrate the involvement of the inflammatory proteins IL-6, ACT and CRP early in the pathology process of AD in patients with mild cognitive impairment (MCI) and AD.

Methods: IL-6, ACT, CRP, Abeta42, phospho-tau (p-tau) and total tau concentrations in serum and CSF of 145 patients with probable AD and 67 patients with MCI were measured by sandwich ELISA. MCI patients were characterized as high- respectively low-risk MCI according to their Abeta42/tau risk profile.

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The influence of seven highly prevalent somatic chronic diseases on changes in cognitive functioning is investigated in older persons in a prospective design covering a 6-year follow-up period. The data were collected as part of the Longitudinal Aging Study Amsterdam (LASA). The associations between chronic diseases and cognitive functioning during 6 years of follow-up were analyzed among 1358 respondents (age 62-85) using generalized estimated equations (GEE).

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Background/aims: The goal of the present study was to evaluate the diagnostic accuracy of the core diagnostic criteria for frontotemporal dementia (FTD) [Neary D, et al: Neurology 1998;51:1546-1554] within a memory clinic population.

Methods: The 5 core diagnostic criteria for FTD were operationalised in an informant-based written questionnaire. For a diagnosis of FTD the total clinical picture was weighted with findings on additional investigations and possible exclusion criteria, with follow-up of at least 1 year.

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Background: Among the general public there is a deep fear of developing dementia, which has led to an increasing number of people "at risk" seeking ways (such as advance directives) to avoid undergoing progressive mental decline. The views of people with dementia are vital in obtaining a real answer to the question of how the disease affects people's lives and whether it actually involves the suffering that so many fear.

Method: A review of the international literature is provided on what is known about living through dementia from the patient's perspective.

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Objective: Recent evidence suggests that the metabolic syndrome and inflammation affect cognitive decline in old age and that they reinforce each other. However, it is not known what the roles of the individual components of the metabolic syndrome on cognition are.

Research Design And Methods: The sample consisted of 1,183 participants in the Longitudinal Aging Study Amsterdam who were aged 65-88 years.

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Inflammation in Alzheimer's disease (AD) may be assessed using (R)-[(11)C]PK11195 and positron emission tomography. Data can be analyzed using the simplified reference tissue model, provided a suitable reference region is available. This study evaluates various reference regions for analyzing (R)-[(11)C]PK11195 scans in patients with mild cognitive impairment (MCI) and probable AD.

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