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Dementia prediction

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https://www.readbyqxmd.com/read/29352978/use-of-multimodality-imaging-and-artificial-intelligence-for-diagnosis-and-prognosis-of-early-stages-of-alzheimer-s-disease
#1
REVIEW
Xiaonan Liu, Kewei Chen, Teresa Wu, David Weidman, Fleming Lure, Jing Li
Alzheimer's disease (AD) is a major neurodegenerative disease and the most common cause of dementia. Currently, no treatment exists to slow down or stop the progression of AD. There is converging belief that disease-modifying treatments should focus on early stages of the disease, that is, the mild cognitive impairment (MCI) and preclinical stages. Making a diagnosis of AD and offering a prognosis (likelihood of converting to AD) at these early stages are challenging tasks but possible with the help of multimodality imaging, such as magnetic resonance imaging (MRI), fluorodeoxyglucose-positron emission topography (PET), amyloid-PET, and recently introduced tau-PET, which provides different but complementary information...
January 10, 2018: Translational Research: the Journal of Laboratory and Clinical Medicine
https://www.readbyqxmd.com/read/29349556/neuropathology-correlates-of-cognitive-assessments
#2
Francesca M Brett, Hugh Kearney
BACKGROUND: Alzheimer's disease and other dementias are the fourth largest contributors to neurological disability and the second largest contributor to deaths from neurological disease. Described in the 1980s as 'the silent epidemic' these disorders principally, though not exclusively, affect persons 80 years or older, and in developed countries, this 'old old' population continues to grow. Definitive diagnosis of the underlying cause of the neurodegenerative disease relies on neuropathological evaluation...
January 18, 2018: Irish Journal of Medical Science
https://www.readbyqxmd.com/read/29348485/motor-signatures-of-emotional-reactivity-in-frontotemporal-dementia
#3
Charles R Marshall, Chris J D Hardy, Lucy L Russell, Camilla N Clark, Rebecca L Bond, Katrina M Dick, Emilie V Brotherhood, Cath J Mummery, Jonathan M Schott, Jonathan D Rohrer, James M Kilner, Jason D Warren
Automatic motor mimicry is essential to the normal processing of perceived emotion, and disrupted automatic imitation might underpin socio-emotional deficits in neurodegenerative diseases, particularly the frontotemporal dementias. However, the pathophysiology of emotional reactivity in these diseases has not been elucidated. We studied facial electromyographic responses during emotion identification on viewing videos of dynamic facial expressions in 37 patients representing canonical frontotemporal dementia syndromes versus 21 healthy older individuals...
January 18, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29338604/clinical-significance-of-cerebral-microbleeds-on-mri-a-comprehensive-meta-analysis-of-risk-of-intracerebral-hemorrhage-ischemic-stroke-mortality-and-dementia-in-cohort-studies-v1
#4
Andreas Charidimou, Sara Shams, Jose R Romero, Jie Ding, Roland Veltkamp, Solveig Horstmann, Gudny Eiriksdottir, Mark A van Buchem, Vilmundur Gudnason, Jayandra J Himali, M Edip Gurol, Anand Viswanathan, Toshio Imaizumi, Meike W Vernooij, Sudha Seshadri, Steven M Greenberg, Oscar R Benavente, Lenore J Launer, Ashkan Shoamanesh
Background Cerebral microbleeds can confer a high risk of intracerebral hemorrhage, ischemic stroke, death and dementia, but estimated risks remain imprecise and often conflicting. We investigated the association between cerebral microbleeds presence and these outcomes in a large meta-analysis of all published cohorts including: ischemic stroke/TIA, memory clinic, "high risk" elderly populations, and healthy individuals in population-based studies. Methods Cohorts (with > 100 participants) that assessed cerebral microbleeds presence on MRI, with subsequent follow-up (≥3 months) were identified...
January 1, 2018: International Journal of Stroke: Official Journal of the International Stroke Society
https://www.readbyqxmd.com/read/29335322/identifying-patterns-of-communication-in-patients-attending-memory-clinics-a-systematic-review-of-observations-and-signs-with-potential-diagnostic-utility
#5
Cate Bailey, Norman Poole, Daniel J Blackburn
BACKGROUND: Subjective cognitive complaints are commonly encountered in primary care and often result in memory clinic referral. However, meta-analyses have shown that such concerns do not consistently correspond to objective memory impairment or predict future dementia. Memory clinic referrals are increasing, with greater proportions of patients attending who do not have dementia. Studies of interaction during memory clinic assessments have identified conversational profiles that can differentiate between dementia and functional disorders of memory...
January 15, 2018: British Journal of General Practice: the Journal of the Royal College of General Practitioners
https://www.readbyqxmd.com/read/29335318/longitudinal-effect-of-stroke-on-cognition-a-systematic-review
#6
REVIEW
Eugene Yh Tang, Obreniokibo Amiesimaka, Stephanie L Harrison, Emma Green, Christopher Price, Louise Robinson, Mario Siervo, Blossom Cm Stephan
BACKGROUND: Stroke is associated with an increased risk of dementia; however, the impact of stroke on cognition has been found to be variable, such that stroke survivors can show decline, remain stable, or revert to baseline cognitive functioning. Knowing the natural history of cognitive impairment after stroke is important for intervention. The aim of this systematic review is to investigate the longitudinal course of cognitive function in stroke survivors. METHODS AND RESULTS: Three electronic databases (Medline, Embase, PsycINFO) were searched using OvidSP from inception to July 15, 2016...
January 15, 2018: Journal of the American Heart Association
https://www.readbyqxmd.com/read/29335040/does-a-cognitive-stress-test-predict-progression-from-mild-cognitive-impairment-to-dementia-equally-well-in-clinical-versus-population-based-settings
#7
Joanne C Beer, Beth E Snitz, Chung-Chou H Chang, David A Loewenstein, Mary Ganguli
BACKGROUND: Evidence suggests that semantic interference may be a sensitive indicator of early dementia. We examined the utility of the Semantic Interference Test (SIT), a cognitive stress memory paradigm which taps proactive and retroactive semantic interference, for predicting progression from mild cognitive impairment (MCI) to dementia in both a clinical and a population-based sample. METHODS: Participants with MCI in the clinical (n = 184) and population-based (n = 435) samples were followed for up to four years...
January 16, 2018: International Psychogeriatrics
https://www.readbyqxmd.com/read/29335033/should-capacity-assessments-be-performed-routinely-prior-to-discussing-advance-care-planning-with-older-people
#8
Oleg Kiriaev, Emme Chacko, J D Jurgens, Meagan Ramages, Phillipa Malpas, Gary Cheung
BACKGROUND: People with dementia receive worse end of life care compared to those with cancer. Barriers to undertaking advanced care planning (ACP) in people with dementia include the uncertainty about their capacity to engage in such discussions. The primary aim of this study was to compare the Advance Care Planning-Capacity Assessment Vignette tool (ACP-CAV) with a semi-structured interview adapted from the MacArthur Competence Assessment Tool-Treatment (MacCAT-T). The secondary aim was to identify demographic and cognitive functioning variables that may predict whether a person has capacity to discuss ACP...
January 16, 2018: International Psychogeriatrics
https://www.readbyqxmd.com/read/29334498/evidence-based-interpretation-of-amyloid-%C3%AE-pet-results-a-clinician-s-tool
#9
David Bergeron, Rik Ossenkoppele, Robert Jr Laforce
BACKGROUND: Amyloid-β positron emission tomography (PET) allows for in vivo detection of fibrillar amyloid plaques, a pathologic hallmark of Alzheimer's disease (AD). However, amyloid-β PET interpretation is limited by the imperfect correlation between PET and autopsy, and the fact that it is positive in about 20% to 30% of cognitively normal individuals and non-AD dementias, especially when older or carrying the ε4 allele of apolipoprotein E (ApoE4). When facing a positive amyloid PET, clinicians have to evaluate the probability of a pathologic false positive as well as the probability of amyloid positivity being age-related, comorbid to a primary non-AD dementia (clinicopathologic false positive)...
January 12, 2018: Alzheimer Disease and Associated Disorders
https://www.readbyqxmd.com/read/29332554/evaluating-the-dose-dependent-mechanism-of-action-of-trazodone-by-estimation-of-occupancies-for-different-brain-neurotransmitter-targets
#10
Luca Settimo, David Taylor
Trazodone is a drug that was introduced in the clinic almost 40 years ago. It is licensed to treat depression, but it is also commonly used off-label to treat insomnia. A recent study shows that it could be promising in preventing neurodegeneration in mice, and clinical trials to assess its possible beneficial effects on dementia and Alzheimer's disease are expected to start soon in humans. In this study, we describe the dose-dependent pharmacology of trazodone by carrying out pharmacokinetic simulations aiming to predict the brain concentrations of trazodone for different drug-dosing regimens and calculating occupancy for 28 different targets for which published trazodone-binding data are available...
January 2018: Journal of Psychopharmacology
https://www.readbyqxmd.com/read/29332036/relationships-between-lower-olfaction-and-brain-white-matter-lesions-in-elderly-subjects-with-mild-cognitive-impairment
#11
Juliette Heinrich, Jean-Sébastien Vidal, Axelle Simon, Anne-Sophie Rigaud, Olivier Hanon, Jacques Epelbaum, Cecile Viollet, Emmanuelle Duron
BACKGROUND: Olfactory impairment is reported in mild cognitive impairment (MCI) and Alzheimer's disease (AD) and is associated with hippocampal atrophy. In elderly people, dementia with AD neuropathology and white matter lesions (WML) is common. In this context, olfactory impairment could also depend on the presence of WML. OBJECTIVE: To assess the cross-sectional relationship between olfaction and WML in elderly subjects with MCI. METHODS: Consecutive subjects, >65 years old, diagnosed as MCI after a comprehensive neuropsychological assessment in an expert memory center, with a brain MRI performed within a year and without major depressive state, were included...
2018: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/29329363/validity-of-teleneuropsychological-assessment-in-older-patients-with-cognitive-disorders
#12
Hannah E Wadsworth, Kaltra Dhima, Kyle B Womack, John Hart, Myron F Weiner, Linda S Hynan, C Munro Cullum
Objective: The feasibility and reliability of neuropsychological assessment at a distance have been demonstrated, but the validity of this testing medium has not been adequately demonstrated. The purpose of this study was to determine the ability of video teleconferencing administration of neuropsychological measures (teleneuropsychology) in discriminating cognitively impaired from non-impaired groups of older adults. It was predicted that measures administered via video teleconference would distinguish groups and that the magnitude of differences between impaired and non-impaired groups would be similar to group differences achieved in traditional administration...
January 10, 2018: Archives of Clinical Neuropsychology: the Official Journal of the National Academy of Neuropsychologists
https://www.readbyqxmd.com/read/29328928/driving-cessation-over-a-24-year-period-dementia-severity-and-cerebrospinal-fluid-biomarkers
#13
Sarah H Stout, Ganesh M Babulal, Chunyu Ma, David B Carr, Denise M Head, Elizabeth A Grant, Monique M Williams, David M Holtzman, Anne M Fagan, John C Morris, Catherine M Roe
INTRODUCTION: With 36 million older adult U.S. drivers, safety is a critical concern, particularly among those with dementia. It is unclear at what stage of Alzheimer's disease (AD) older adults stop driving and whether preclinical AD affects driving cessation. METHODS: Time to driving cessation was examined based on Clinical Dementia Rating (CDR) and AD cerebrospinal fluid biomarkers. 1795 older adults followed up to 24 years received CDR ratings. A subset (591) had cerebrospinal fluid biomarker measurements and was followed up to 17 years...
January 9, 2018: Alzheimer's & Dementia: the Journal of the Alzheimer's Association
https://www.readbyqxmd.com/read/29324989/synaptic-markers-of-cognitive-decline-in-neurodegenerative-diseases-a-proteomic-approach
#14
Erika Bereczki, Rui M Branca, Paul T Francis, Joana B Pereira, Jean-Ha Baek, Tibor Hortobágyi, Bengt Winblad, Clive Ballard, Janne Lehtiö, Dag Aarsland
Cognitive changes occurring throughout the pathogenesis of neurodegenerative diseases are directly linked to synaptic loss. We used in-depth proteomics to compare 32 post-mortem human brains in the prefrontal cortex of prospectively followed patients with Alzheimer's disease, Parkinson's disease with dementia, dementia with Lewy bodies and older adults without dementia. In total, we identified 10 325 proteins, 851 of which were synaptic proteins. Levels of 25 synaptic proteins were significantly altered in the various dementia groups...
January 9, 2018: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/29324921/the-correlation-of-evans-index-with-csf-protein-levels-and-ventriculomegaly
#15
D Papaoikonomou, E Karypidou, P Megagiannis, F Tsolaki-Tagaraki, S Nenopoulou, O Gkatzima, Magda Tsolaki
OBJECTIVE: The role of ventriculomegaly and its interplay between various dementia entities and their pathogenesis, as well as its correlation to the levels of CSF protein markers, remains to be elucidated. Evans index (EI) is a well-established radiological marker in the diagnosis of idiopathic Normal Pressure Hydrocephalus (iNPH), assessing ventricular enlargement. However, there are no previous studies investigating the correlation between EI, age, beta amyloid (Aβ), tau and phosphorylated-tau (p-tau) proteins in the CSF...
September 2017: Hellenic Journal of Nuclear Medicine
https://www.readbyqxmd.com/read/29323400/-amimia-in-parkinson-s-disease-significance-and-correlation-with-the-clinical-features
#16
P J Garcia-Ruiz, C E Feliz-Feliz, T Maycas-Cepeda, J Del Val-Fernandez
INTRODUCTION: Reduced facial expression or amimia is one of the most typical characteristics of Parkinson's disease (PD). Despite being described in classic texts, its significance, physiopathology and correlation with motor and non-motor symptoms is largely unknown. PATIENTS AND METHODS: We have studied facial bradykinesia in a group of 84 de novo PD patients prospectively evaluated for five years. We also studied the relationship of facial bradykinesia with depression in a subgroup of 30 patients...
January 16, 2018: Revista de Neurologia
https://www.readbyqxmd.com/read/29319602/an-interactional-profile-to-assist-the-differential-diagnosis-of-neurodegenerative-and-functional-memory-disorders
#17
Markus Reuber, Daniel J Blackburn, Chris Elsey, Sarah Wakefield, Kerry A Ardern, Kirsty Harkness, Annalena Venneri, Danielle Jones, Chloe Shaw, Paul Drew
OBJECTIVE: Specialist services for dementia are seeing an increasing number of patients. We investigated whether interactional and linguistic features in the communication behavior of patients with memory problems could help distinguish between those with problems secondary to neurological disorders (ND) and those with functional memory disorder (FMD). METHODS: In part 1 of this study, a diagnostic scoring aid (DSA) was developed encouraging linguists to provide quantitative ratings for 14 interactional features...
January 9, 2018: Alzheimer Disease and Associated Disorders
https://www.readbyqxmd.com/read/29319337/reliable-change-and-minimum-clinically-important-difference-mcid-of-the-repeatable-battery-for-the-assessment-of-neuropsychology-status-rbans-in-a-heterogeneous-dementia-sample-support-for-reliable-change-methods-but-not-the-mcid
#18
Megan E O'Connell, Benjamin Gould, Jake Ursenbach, Joe Enright, Debra G Morgan
We compare reliable change scores and recently published anchor-based cutoffs for minimum clinically important difference (MCID) for the Repeatable Battery for the Assessment of Neuropsychological Status (RBANS) in a sample of patients diagnosed with various forms of dementia. For memory clinic patients with dementia evaluated twice over a one-year interval (N = 53), observed retest RBANS index scores were compared with predicted retest index scores based on regression formulae developed from cognitively healthy older adults...
January 10, 2018: Applied Neuropsychology. Adult
https://www.readbyqxmd.com/read/29317003/identification-of-heterogeneous-cognitive-subgroups-in-community-dwelling-older-adults-a-latent-class-analysis-of-the-einstein-aging-study
#19
Andrea R Zammit, Charles B Hall, Richard B Lipton, Mindy J Katz, Graciela Muniz-Terrera
OBJECTIVES: The aim of this study was to identify natural subgroups of older adults based on cognitive performance, and to establish each subgroup's characteristics based on demographic factors, physical function, psychosocial well-being, and comorbidity. METHODS: We applied latent class (LC) modeling to identify subgroups in baseline assessments of 1345 Einstein Aging Study (EAS) participants free of dementia. The EAS is a community-dwelling cohort study of 70+ year-old adults living in the Bronx, NY...
January 10, 2018: Journal of the International Neuropsychological Society: JINS
https://www.readbyqxmd.com/read/29316987/diet-nutrition-and-the-ageing-brain-current-evidence-and-new-directions
#20
Katie Moore, Catherine F Hughes, Mary Ward, Leane Hoey, Helene McNulty
Globally populations are ageing. By 2050, it is estimated that there will be two billion people aged 60 years or over, of which 131 million are projected to be affected by dementia, while depression is predicted to be the second leading cause of disability worldwide by 2020. Preventing or delaying the onset of these disorders should therefore be a public health priority. There is some evidence linking certain dietary patterns, particularly the Mediterranean diet, with a reduced risk of dementia and depression...
January 10, 2018: Proceedings of the Nutrition Society
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