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https://www.readbyqxmd.com/read/29023987/prevalence-of-delusions-in-drug-na%C3%A3-ve-alzheimer-disease-patients-a-meta-analysis
#1
Leo Lai, Philip E Lee, Peter Chan, Mark C Fok, Ging-Yuek R Hsiung, Amir A Sepehry
INTRODUCTION: Neuropsychiatric symptoms (NPS) are common at all stages of Alzheimer disease (AD). Delusions in AD are associated with negative clinical consequences and may signal rapid disease progression. Hence, we sought to determine the prevalence of delusions in drug-naïve (no cholinesterase inhibitor or neuroleptic medications) AD patients. METHODS: In this meta-analysis, a search of the EMBASE, MEDLINE, and PsycINFO databases was performed. We selected studies reporting delusion prevalence measured by the Neuropsychiatric Inventory (NPI) in drug-naïve AD patients...
October 11, 2017: International Journal of Geriatric Psychiatry
https://www.readbyqxmd.com/read/28993868/-dementia-view-of-sufferers-and-their-relatives
#2
REVIEW
Rainer Schaub, Heike von Lützau-Hohlbein
Dementia is the leading cause of cognitive and functional impairment in old age; however, within the scientific community this complex disease is predominantly viewed from a narrow neurobiological and medical perspective, whereas the subjective aspects of dementia, particularly the psychological and social consequences, albeit severe are more or less neglected. In this article the subjective side of experiences of persons with dementia and their relatives are discussed and special aspects of their specific problems and needs during the course of the illness are described...
October 9, 2017: Zeitschrift Für Gerontologie und Geriatrie
https://www.readbyqxmd.com/read/28991698/pitx3-genotype-and-risk-of-dementia-in-parkinson-s-disease-a-population-based-study
#3
David Bäckström, Magdalena Eriksson Domellöf, Gabriel Granåsen, Jan Linder, Sofia Mayans, Eva Elgh, Susanna Jakobson Mo, Lars Forsgren
Dementia is a devastating manifestation of Parkinson's disease (PD). This study investigates whether a common polymorphism in the PITX3 gene (rs2281983), which is of importance for the function of dopaminergic neurons, affects the risk of developing dementia in PD and whether it affects dopamine transporter (DAT) uptake. We PITX3 genotyped 133 patients with new-onset, idiopathic PD, participating in a population-based study in Sweden. Patients were followed prospectively during 6-11years with extensive investigations, including neuropsychology and DAT-imaging with (123)I FP-CIT...
October 15, 2017: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/28982592/human-amyloid-%C3%AE-peptide-and-tau-co-expression-impairs-behavior-and-causes-specific-gene-expression-changes-in-caenorhabditis-elegans
#4
Chenyin Wang, Valeria Saar, Ka Lai Leung, Liang Chen, Garry Wong
Alzheimer's disease (AD) is a progressive neurodegenerative disorder characterized by the presence of extracellular amyloid plaques consisting of Amyloid-β peptide (Aβ) aggregates and neurofibrillary tangles formed by aggregation of hyperphosphorylated microtubule-associated protein tau. We generated a novel invertebrate model of AD by crossing Aβ1-42 (strain CL2355) with either pro-aggregating tau (strain BR5270) or anti-aggregating tau (strain BR5271) pan-neuronal expressing transgenic Caenorhabditis elegans...
October 2, 2017: Neurobiology of Disease
https://www.readbyqxmd.com/read/28975128/specification-of-change-mechanisms-in-pregnant-smokers-for-malleable-target-identification-a-novel-approach-to-a-tenacious-public-health-problem
#5
Suena H Massey, Jean Decety, Katherine L Wisner, Lauren S Wakschlag
Maternal smoking during pregnancy (MSDP) continues to be a leading modifiable risk factor for perinatal complications and a range of neurodevelopmental and cardio-metabolic outcomes across the lifespan. Despite 40 years of intervention research less than one in five pregnant smokers who receive an intervention quit by delivery. Within this context, recognition of pregnancy is commonly associated with abrupt suspension or reduction of smoking in the absence of intervention, yet has not been investigated as a volitional target...
2017: Frontiers in Public Health
https://www.readbyqxmd.com/read/28967386/structural-neuroimaging-of-anorexia-nervosa-future-directions-in-the-quest-for-mechanisms-underlying-dynamic-alterations
#6
REVIEW
Joseph A King, Guido K W Frank, Paul M Thompson, Stefan Ehrlich
Anorexia nervosa (AN) is a serious eating disorder characterized by self-starvation and extreme weight loss. Pseudoatrophic brain changes are often readily visible in individual brain scans, and AN may be a valuable model disorder to study structural neuroplasticity. Structural magnetic resonance imaging studies have found reduced gray matter volume and cortical thinning in acutely underweight patients to normalize following successful treatment. However, some well-controlled studies have found regionally greater gray matter and persistence of structural alterations following long-term recovery...
August 24, 2017: Biological Psychiatry
https://www.readbyqxmd.com/read/28955220/alterations-in-the-interplay-between-neurons-astrocytes-and-microglia-in-the-rat-dentate-gyrus-in-experimental-models-of-neurodegeneration
#7
Daniele Lana, Filippo Ugolini, Daniele Nosi, Gary L Wenk, Maria G Giovannini
The hippocampus is negatively affected by aging and neurodegenerative diseases leading to impaired learning and memory abilities. A diverse series of progressive modifications in the intercellular communication among neurons, astrocytes and microglia occur in the hippocampus during aging or inflammation. A detailed understanding of the neurobiological modifications that contribute to hippocampal dysfunction may reveal new targets for therapeutic intervention. The current study focussed on the interplay between neurons and astroglia in the Granule Layer (GL) and the Polymorphic Layer (PL) of the Dentate Gyrus (DG) of adult, aged and LPS-treated rats...
2017: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/28945744/relating-dynamic-brain-states-to-dynamic-machine-states-human-and-machine-solutions-to-the-speech-recognition-problem
#8
Cai Wingfield, Li Su, Xunying Liu, Chao Zhang, Phil Woodland, Andrew Thwaites, Elisabeth Fonteneau, William D Marslen-Wilson
There is widespread interest in the relationship between the neurobiological systems supporting human cognition and emerging computational systems capable of emulating these capacities. Human speech comprehension, poorly understood as a neurobiological process, is an important case in point. Automatic Speech Recognition (ASR) systems with near-human levels of performance are now available, which provide a computationally explicit solution for the recognition of words in continuous speech. This research aims to bridge the gap between speech recognition processes in humans and machines, using novel multivariate techniques to compare incremental 'machine states', generated as the ASR analysis progresses over time, to the incremental 'brain states', measured using combined electro- and magneto-encephalography (EMEG), generated as the same inputs are heard by human listeners...
September 2017: PLoS Computational Biology
https://www.readbyqxmd.com/read/28942354/the-priming-of-basic-combinatory-responses-in-meg
#9
Esti Blanco-Elorrieta, Victor S Ferreira, Paul Del Prato, Liina Pylkkänen
Priming has been a powerful tool for the study of human memory and especially the memory representations relevant for language. However, although it is well established that lexical access can be primed, we do not know exactly what types of computations can be primed above the word level. This work took a neurobiological approach and assessed the ways in which the complex representation of a minimal combinatory phrase, such as red boat, can be primed, as evidenced by the spatiotemporal profiles of magnetoencephalography (MEG) signals...
September 21, 2017: Cognition
https://www.readbyqxmd.com/read/28941093/staging-in-bipolar-disorder-from-theoretical-framework-to-clinical-utility
#10
Michael Berk, Robert Post, Aswin Ratheesh, Emma Gliddon, Ajeet Singh, Eduard Vieta, Andre F Carvalho, Melanie M Ashton, Lesley Berk, Susan M Cotton, Patrick D McGorry, Brisa S Fernandes, Lakshmi N Yatham, Seetal Dodd
Illness staging is widely utilized in several medical disciplines to help predict course or prognosis, and optimize treatment. Staging models in psychiatry in general, and bipolar disorder in particular, depend on the premise that psychopathology moves along a predictable path: an at-risk or latency stage, a prodrome progressing to a first clinical threshold episode, and one or more recurrences with the potential to revert or progress to late or end-stage manifestations. The utility and validity of a staging model for bipolar disorder depend on its linking to clinical outcome, treatment response and neurobiological measures...
October 2017: World Psychiatry: Official Journal of the World Psychiatric Association (WPA)
https://www.readbyqxmd.com/read/28936231/promoting-healthy-child-development-via-a-two-generation-translational-neuroscience-framework-the-filming-interactions-to-nurture-development-video-coaching-program
#11
Philip A Fisher, Tahl I Frenkel, Laura K Noll, Melanie Berry, Melissa Yockelson
In this article, we focus on applying methods of translational neuroscience to two-generation, family-based interventions. In recent years, a small but growing body of evidence has documented the reversibility of some of the neurobiological effects of early adversity in the context of environmental early interventions. Some of these interventions are now being implemented at scale, which may help reduce disparities in the face of early life stress. Further progress may occur by extending these efforts to two-generation models that target caregivers' capabilities to improve children's outcomes...
December 2016: Child Development Perspectives
https://www.readbyqxmd.com/read/28931490/gpcrs-emerging-anti-cancer-drug-targets
#12
REVIEW
Ainhoa Nieto Gutierrez, Patricia H McDonald
G protein-coupled receptors (GPCRs) constitute the largest and most diverse protein family in the human genome with over 800 members identified to date. They play critical roles in numerous cellular and physiological processes, including cell proliferation, differentiation, neurotransmission, development and apoptosis. Consequently, aberrant receptor activity has been demonstrated in numerous disorders/diseases, and as a result GPCRs have become the most successful drug target class in pharmaceuticals treating a wide variety of indications such as pain, inflammation, neurobiological and metabolic disorders...
September 18, 2017: Cellular Signalling
https://www.readbyqxmd.com/read/28924872/-alzheimer-s-disease-from-auguste-deter-to-the-present-progress-disappointments-and-open-questions
#13
REVIEW
Johannes Pantel
AIM: The present article aims to provide a short overview of the discovery history, conceptual development, as well as on current neurobiological and pharmacological research questions in the field of Alzheimer's disease (AD). In view of the long hoped for but so far unachieved therapeutic breakthrough, this also includes a critical reflection of current research paradigms. MATERIAL AND METHODS: Starting from the first case report described by Alois Alzheimer in 1906, the historical impact of his seminal discovery is reconstructed...
September 18, 2017: Zeitschrift Für Gerontologie und Geriatrie
https://www.readbyqxmd.com/read/28911050/motor-abnormalities-from-neurodevelopmental-to-neurodegenerative-through-functional-neuro-psychiatric-disorders
#14
Victor Peralta, Manuel J Cuesta
Background: Motor abnormalities (MAs) of severe mental disorders have been traditionally neglected both in clinical practice and research, although they are an increasing focus of attention because of their clinical and neurobiological relevance. For historical reasons, most of the literature on MAs has been focused to a great extent on schizophrenia, and as a consequence their prevalence and featural properties in other psychiatric or neuropsychiatric disorders are poorly known. In this article, we evaluated the extent to which catatonic, extrapyramidal and neurological soft signs, and their associated clinical features, are present transdiagnostically...
September 1, 2017: Schizophrenia Bulletin
https://www.readbyqxmd.com/read/28900155/inflexible-neurobiological-signatures-precede-atypical-development-in-infants-at-high-risk-for-autism
#15
Kristina Denisova, Guihu Zhao
Variability in neurobiological signatures is ubiquitous in early life but the link to adverse developmental milestones in humans is unknown. We examined how levels of signal and noise in movement signatures during the 1st year of life constrain early development in 71 healthy typically developing infants, either at High or Low familial Risk (HR or LR, respectively) for developing Autism Spectrum Disorders (ASD). Delays in early learning developmental trajectories in HR infants (validated in an analysis of 1,445 infants from representative infant-sibling studies) were predicted by worse stochastic patterns in their spontaneous head movements as early as 1-2 months after birth, relative to HR infants who showed more rapid developmental progress, as well as relative to all LR infants...
September 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28899446/affective-and-emotional-dysregulation-as-pre-dementia-risk-markers-exploring-the-mild-behavioral-impairment-symptoms-of-depression-anxiety-irritability-and-euphoria
#16
Zahinoor Ismail, Jennifer Gatchel, Daniel R Bateman, Ricardo Barcelos-Ferreira, Marc Chantillon, Judith Jaeger, Nancy J Donovan, Moyra E Mortby
BACKGROUND: Affective and emotional symptoms such as depression, anxiety, euphoria, and irritability are common neuropsychiatric symptoms (NPS) in pre-dementia and cognitively normal older adults. They comprise a domain of Mild Behavioral Impairment (MBI), which describes their emergence in later life as an at-risk state for cognitive decline and dementia, and as a potential manifestation of prodromal dementia. This selective scoping review explores the epidemiology and neurobiological links between affective and emotional symptoms, and incident cognitive decline, focusing on recent literature in this expanding field of research...
September 13, 2017: International Psychogeriatrics
https://www.readbyqxmd.com/read/28892737/misdeed-of-the-need-towards-computational-accounts-of-transition-to-addiction
#17
REVIEW
Mehdi Keramati, Serge H Ahmed, Boris S Gutkin
Drug addiction is a complex behavioral and neurobiological disorder which, in an emergent brain-circuit view, reflects a loss of prefrontal top-down control over subcortical circuits governing drug-seeking and drug-taking. We first review previous computational accounts of addiction, focusing on cocaine addiction and on prevalent dopamine-based positive-reinforcement and negative-reinforcement computational models. Then, we discuss a recent computational proposal that the progression to addiction is unlikely to result from a complete withdrawal of the goal-oriented decision system in favor the habitual one...
September 8, 2017: Current Opinion in Neurobiology
https://www.readbyqxmd.com/read/28870769/progressing-neurobiological-strategies-against-proteostasis-failure-challenges-in-neurodegeneration
#18
REVIEW
Ayeman Amanullah, Arun Upadhyay, Vibhuti Joshi, Ribhav Mishra, Nihar Ranjan Jana, Amit Mishra
Proteins are ordered useful cellular entities, required for normal health and organism's survival. The proteome is the absolute set of cellular expressed proteins, which regulates a wide range of physiological functions linked with all domains of life. In aging cells or under unfavorable cellular conditions, misfolding of proteins generates common pathological events linked with neurodegenerative diseases and aging. Current advances of proteome studies systematically generates some progress in our knowledge that how misfolding of proteins or their accumulation can contribute to the impairment or depletion of proteome functions...
September 1, 2017: Progress in Neurobiology
https://www.readbyqxmd.com/read/28867652/the-neuropsychology-and-neurobiology-of-late-onset-schizophrenia-and-very-late-onset-schizophrenia-like-psychosis-a-critical-review
#19
REVIEW
Lies Van Assche, Manuel Morrens, Patrick Luyten, Luc Van de Ven, Mathieu Vandenbulcke
OBJECTIVE: The current review discusses neuropsychological profiles and the longitudinal course of cognitive dysfunction in Late Onset Schizophrenia (LOS) and Very-late-onset schizophrenia-like psychosis (VLOSLP), and attempts to clarify its neurobiological underpinnings. METHOD: A systematic literature search resulted in 29 publications describing original research on the neuropsychology of LOS/VLOSLP and 46 studies focussing on neurobiology. RESULTS: Although mildly progressive cognitive impairment is usually present, only a subgroup of LOS/VLOSLP develops dementia during a 10-year follow-up succeeding the onset of psychosis...
September 1, 2017: Neuroscience and Biobehavioral Reviews
https://www.readbyqxmd.com/read/28857482/dopaminergic-and-behavioral-changes-in-a-loss-of-imprinting-model-of-cdkn1c
#20
Gráinne I McNamara, Brittany A Davis, Molly Browne, Trevor Humby, Jeffrey W Dalley, Jing Xia, Rosalind M John, Anthony R Isles
The imprinted gene Cdkn1c is expressed exclusively from the maternally inherited allele as a consequences of epigenetic regulation. Cdkn1c exemplifies many of the functional characteristics of imprinted genes, playing a role in fetal growth and placental development. However, Cdkn1c also plays an important role in the brain, being key to the appropriate proliferation and differentiation of midbrain dopaminergic neurons. Using a transgenic model (Cdkn1c(BACx1) ) with a two-fold elevation in Cdkn1c expression that mimics loss-of-imprinting, we show that increased expression of Cdkn1c in the brain gives rise to neurobiological and behavioural changes indicative of a functionally altered dopaminergic system...
August 31, 2017: Genes, Brain, and Behavior
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