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https://www.readbyqxmd.com/read/28532055/gold-nanoparticles-prevent-cognitive-deficits-oxidative-stress-and-inflammation-in-a-rat-model-of-sporadic-dementia-of-alzheimer-s-type
#1
Alexandre Pastoris Muller, Gabriela K Ferreira, Allison José Pires, Gustavo de Bem Silveira, Débora Laureano de Souza, Joice de Abreu Brandolfi, Claudio Teodoro de Souza, Marcos M S Paula, Paulo Cesar Lock Silveira
Alzheimer's disease (AD) is the most common form of neurodegenerative dementia in the aged brain. Even though its etiology is unknown, factors such as neuroinflammation, mitochondrial dysfunction, formation of reactive oxygen species (ROS), and impaired insulin signaling may play a role. We used a sporadic AD model in rats generated by intracerebroventricular-streptozotocin (i.c.v.-STZ) injection to test the therapeutic effect of gold nanoparticles (GNPs). We tested the null hypothesis that there would be no difference between the STZ+GNPs group and the STZ group in the analyzed markers...
August 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28531760/the-relationship-between-processing-style-trauma-memory-processes-and-the-development-of-posttraumatic-stress-symptoms-in-children-and-adolescents
#2
Anna McKinnon, Neil Brewer, Kate Cameron, Reginald D V Nixon
BACKGROUND AND OBJECTIVES: Data-driven processing, peri-event fear, and trauma memory characteristics are hypothesised to play a core role in the development of Posttraumatic Stress Disorder. We assessed the relationships between these characteristics and Posttraumatic Stress (PTS) symptoms in a sample of youth. METHODS: Study 1 (N = 36, 7-16 years), involved a sample of children who had undergone a stressful orthopaedic procedure. One week later they answered a series of probed recall questions about the trauma (assessed for accuracy by comparison to a video) and reported on their PTS symptoms...
April 21, 2017: Journal of Behavior Therapy and Experimental Psychiatry
https://www.readbyqxmd.com/read/28531645/judgment-of-moral-and-social-transgression-in-schizophrenia
#3
Jonathan McGuire, Martin Brüne, Robyn Langdon
INTRODUCTION: Despite evidence of pervasive social-cognitive deficits in schizophrenia, little is known of moral cognition in this population. While recent research indicates that impairment of explicit moral reasoning is explained by these individuals' other cognitive deficits, their capacities for basic moral judgment are unknown. METHODS: 45 people with schizophrenia and 27 healthy controls completed the Moral-Conventional Distinction Task: a classic task that assesses judgment of violations of moral or social convention on permissibility, severity, and authority-contingence...
May 4, 2017: Comprehensive Psychiatry
https://www.readbyqxmd.com/read/28531561/a-meta-analysis-of-neurocognition-in-youth-with-familial-high-risk-for-bipolar-disorder
#4
E Bora, A Özerdem
OBJECTIVE: Neuropsychological impairment, including deficits in social cognition is evident in subjects at genetic high-risk for psychosis. However, findings in youth at genetic risk to bipolar disorder (BP) have been suggested to be less supportive of premorbid deficits. We aimed to conduct a meta-analysis of cognitive deficits in youth with familiar risk for bipolar disorder (FHR-BD). METHODS: A novel meta-analysis of FHR-BD (mean age 10-25), including 18 studies (786 offsprings/siblings of patients with BD and 794 healthy controls), was conducted...
March 3, 2017: European Psychiatry: the Journal of the Association of European Psychiatrists
https://www.readbyqxmd.com/read/28531379/the-association-between-an-inflammatory-diet-and-global-cognitive-function-and-incident-dementia-in-older-women-the-women-s-health-initiative-memory-study
#5
Kathleen M Hayden, Daniel P Beavers, Susan E Steck, James R Hebert, Fred K Tabung, Nitin Shivappa, Ramon Casanova, JoAnn E Manson, Claudia B Padula, Elena Salmoirago-Blotcher, Linda G Snetselaar, Oleg Zaslavsky, Stephen R Rapp
INTRODUCTION: The Mediterranean and Dietary Approaches to Stop Hypertension diets have been associated with lower dementia risk. We evaluated dietary inflammatory potential in relation to mild cognitive impairment (MCI)/dementia risk. METHODS: Baseline food frequency questionnaires from n = 7085 women (aged 65-79 years) were used to calculate Dietary Inflammatory Index (DII) scores that were categorized into four groups. Cognitive function was evaluated annually, and MCI and all-cause dementia cases were adjudicated centrally...
May 19, 2017: Alzheimer's & Dementia: the Journal of the Alzheimer's Association
https://www.readbyqxmd.com/read/28531307/following-instructions-in-patients-with-schizophrenia-the-benefits-of-actions-at-encoding-and-recall
#6
Simon S Y Lui, Tian-Xiao Yang, Chris L Y Ng, Peony T Y Wong, Jessica O Y Wong, Ulrich Ettinger, Eric F C Cheung, Raymond C K Chan
The ability to follow spoken instructions is important to everyday functioning but has seldom been studied in patients with schizophrenia (SZ). Recent evidence suggests that action-based processing may facilitate the ability to follow instructions, which relies largely on working memory. In this study, we tested the hypothesis that SZ patients may also benefit from action-based advantages in following instructions. Forty-eight clinically stable SZ patients and 48 demographic- and IQ-matched controls completed a following spoken instruction span task involving varied encoding and recall conditions...
May 22, 2017: Schizophrenia Bulletin
https://www.readbyqxmd.com/read/28530428/short-term-memory-and-long-term-memory-are-still-different
#7
Dennis Norris
A commonly expressed view is that short-term memory (STM) is nothing more than activated long-term memory. If true, this would overturn a central tenet of cognitive psychology-the idea that there are functionally and neurobiologically distinct short- and long-term stores. Here I present an updated case for a separation between short- and long-term stores, focusing on the computational demands placed on any STM system. STM must support memory for previously unencountered information, the storage of multiple tokens of the same type, and variable binding...
May 22, 2017: Psychological Bulletin
https://www.readbyqxmd.com/read/28529872/functional-network-changes-and-cognitive-control-in-schizophrenia
#8
Kimberly L Ray, Tyler A Lesh, Amber M Howell, Taylor P Salo, J Daniel Ragland, Angus W MacDonald, James M Gold, Steven M Silverstein, Deana M Barch, Cameron S Carter
Cognitive control is a cognitive and neural mechanism that contributes to managing the complex demands of day-to-day life. Studies have suggested that functional impairments in cognitive control associated brain circuitry contribute to a broad range of higher cognitive deficits in schizophrenia. To examine this issue, we assessed functional connectivity networks in healthy adults and individuals with schizophrenia performing tasks from two distinct cognitive domains that varied in demands for cognitive control, the RiSE episodic memory task and DPX goal maintenance task...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28529544/complementary-and-alternative-interventions-for-fatigue-management-after-traumatic-brain-injury-a-systematic-review
#9
Gang-Zhu Xu, Yan-Feng Li, Mao-De Wang, Dong-Yuan Cao
BACKGROUND: We systematically reviewed randomized controlled trials (RCTs) of complementary and alternative interventions for fatigue after traumatic brain injury (TBI). METHODS: We searched multiple online sources including ClinicalTrials.gov, the Cochrane Library database, MEDLINE, CINAHL, Embase, the Web of Science, AMED, PsychINFO, Toxline, ProQuest Digital Dissertations, PEDro, PsycBite, and the World Health Organization (WHO) trial registry, in addition to hand searching of grey literature...
May 2017: Therapeutic Advances in Neurological Disorders
https://www.readbyqxmd.com/read/28529231/alzheimer-s-disease-metaphors-as-mirror-and-lens-to-the-stigma-of-dementia
#10
Martina Zimmermann
This essay gives an overview of the metaphors that patients in comparison to caregivers employ to conceptualize their experience with the chronic degenerative, cognitive, and incurable aspects of Alzheimer's disease. It explores how the images (such as the journey, darkness, the death sentence, and torture) relate to the narration of cognitive decline and memory loss, and how these personal accounts negotiate with the culturally dominant dementia narrative that centers on the patient's passivity and dependence and is, usually, found in caregiver stories...
2017: Literature and Medicine
https://www.readbyqxmd.com/read/28529052/prenatal-melamine-exposure-induces-impairments-of-spatial-cognition-and-hippocampal-synaptic-plasticity-in-female-adolescent-rats
#11
Lei An, Wei Sun
Developmental exposure to melamine induces long-term effects on brain and behavior in male rodents. To examine whether this prenatal event damages cognitive function in female offspring, we evaluated the behavioral effects and further attempted to investigate synaptic function. Prenatal melamine exposure (PME) was given by oral treatment to pregnant females through the whole gestational days with 400mg/day/kg bodyweight. On postnatal day (PD) 36, female offspring were assessed for spatial cognition in the Morris Water Maze (MWM) test...
May 18, 2017: Neurotoxicology
https://www.readbyqxmd.com/read/28528774/local-to-remote-cortical-connectivity-in-amnestic-mild-cognitive-impairment
#12
Yi-Wen Zhang, Zhi-Lian Zhao, Zhigang Qi, Yang Hu, Yin-Shan Wang, Can Sheng, Yu Sun, Xiaoni Wang, Li-Li Jiang, Chao-Gan Yan, Kuncheng Li, Hui-Jie Li, Xi-Nian Zuo
Alterations in both local and remote connectivity were reported in amnestic mild cognitive impairment (aMCI) patients but rarely in the same group of patients. In the present study, we employed a novel resting-state functional magnetic resonance imaging (rfMRI) connectome index, regional functional homogeneity on the 2-dimensional cortical surface, to detect full-cortex vertex-wise changes of the local rfMRI connectivity in 32 aMCI patients compared with 40 healthy controls. We further used the seed-based functional connectivity to explore the remote rfMRI connectivity in aMCI...
April 26, 2017: Neurobiology of Aging
https://www.readbyqxmd.com/read/28528773/apoe-moderates-compensatory-recruitment-of-neuronal-resources-during-working-memory-processing-in-healthy-older-adults
#13
Elisa Scheller, Jessica Peter, Lena V Schumacher, Jacob Lahr, Irina Mader, Christoph P Kaller, Stefan Klöppel
The APOE ε4 allele increases the risk for sporadic Alzheimer's disease and modifies brain activation patterns of numerous cognitive domains. We assessed cognitively intact older adults with a letter n-back task to determine if previously observed increases in ε4 carriers' working-memory-related brain activation are compensatory such that they serve to maintain working memory function. Using multiple regression models, we identified interactions of APOE variant and age in bilateral hippocampus independently from task performance: ε4 carriers only showed a decrease in activation with increasing age, suggesting high sensitivity of fMRI data for detecting changes in Alzheimer's disease-relevant brain areas before cognitive decline...
April 26, 2017: Neurobiology of Aging
https://www.readbyqxmd.com/read/28528736/on-the-effectiveness-of-event-related-beta-tacs-on-episodic-memory-formation-and-motor-cortex-excitability
#14
Verena Braun, Rodika Sokoliuk, Simon Hanslmayr
BACKGROUND: Transcranial alternating current stimulation (tACS) is widely used to entrain or modulate brain oscillations in order to investigate causal relationships between oscillations and cognition. OBJECTIVE: In a series of experiments we here addressed the question of whether event-related, transient tACS in the beta frequency range can be used to entrain beta oscillations in two different domains: episodic memory formation and motor cortex excitability. METHODS: In experiments 1 and 2, 72 healthy human participants engaged in an incidental encoding task of verbal and non-verbal material while receiving tACS to the left and right inferior frontal gyrus (IFG) at 6...
April 30, 2017: Brain Stimulation
https://www.readbyqxmd.com/read/28528599/eeg-beta-2-power-as-surrogate-marker-for-memory-impairment-a-pilot-study
#15
Andreas K Kaiser, Michael Doppelmayr, Bernhard Iglseder
BACKGROUND: Memory deficits are dominant in dementia and are positively correlated with electroencephalographic (EEG) beta power. EEG beta power can predict the progression of Alzheimer´s (AD) as early as at the stage of mild cognitive impairment (MCI) and could possibly be used as surrogate marker for memory impairment. The objective of this study is to analyze the relationship between frontal and parietal EEG beta power and memory-test outcome. Frontal and parietal beta power is analyzed for a resting state and an eyes-closed backward counting condition and related to memory impairment parameters...
May 22, 2017: International Psychogeriatrics
https://www.readbyqxmd.com/read/28528230/effect-of-childhood-trauma-on-cognitive-functions-in-a-sample-of-chinese-patients-with-schizophrenia
#16
Xian-Bin Li, Qi-Jing Bo, Guang-Ping Zhang, Wei Zheng, Zhi-Min Wang, An-Ning Li, Qing Tian, Jin-Tong Liu, Yi-Lang Tang, Chuan-Yue Wang
In this study, we aimed to determine the influence of various types of childhood trauma (CT) on cognitive functions in Chinese patients presented with schizophrenia. One hundred sixty-two patients were assessed with the Childhood Trauma Questionnaire-Short Form (CTQ-SF) and Repeatable Battery for the Assessment of Neuropsychological Status (RBANS). We investigated the correlations between various types of CT, demographic characteristics, and cognitive functions. Significant negative correlations were observed in physical abuse (PA) and sexual abuse (SA) with the language score (r=-0...
May 5, 2017: Comprehensive Psychiatry
https://www.readbyqxmd.com/read/28528185/simvastatin-ameliorate-memory-deficits-and-inflammation-in-clinical-and-mouse-model-of-alzheimer-s-disease-via-modulating-the-expression-of-mir-106b
#17
Wenzhong Huang, Zhenyu Li, Liandong Zhao, Wei Zhao
BACKGROUND: Alzheimer's disease (AD) as a neurodegenerative brain disorder is a devastating pathology leading to disastrous cognitive impairments and dementia, and several studies have shown that AD is closely related to the inflammation, so anti-inflammatory treatment may provide therapeutic benefits. In this study, the effect of simvastatin on inflammation was investigated and the underlying mechanisms were explored. METHODS: First, we tested the effect of simvastatin on AD in clinical research...
May 18, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28527907/behavioral-and-cognitive-impact-of-early-life-stress-insights-from-an-animal-model
#18
Hesong Liu, Fatin Atrooz, Ankita Salvi, Samina Salim
BACKGROUND: Children subjected to traumatic events during childhood are reported to exhibit behavioral and cognitive deficits later in life, often leading to post-traumatic stress disorder (PTSD) and major depression. Interestingly, some children continue to remain normal despite being exposed to the same risk factors. These trauma-related behavioral and cognitive profiles across different stages of life are not well understood. Animal studies can offer useful insights. OBJECTIVE: The goal of this study was to determine the impact of early life exposure to traumatic events on behavioral and cognitive profile in rats by tracking the behavior of each rat at different ages...
May 17, 2017: Progress in Neuro-psychopharmacology & Biological Psychiatry
https://www.readbyqxmd.com/read/28527787/neural-correlates-of-believing
#19
Xiaochun Han, Ting Zhang, Shiyu Wang, Shihui Han
Beliefs provide a fundamental cognitive basis for human behavior. But how the brain believes remains a mystery. We investigated the neural underpinnings of believing by scanning healthy adults using functional magnetic resonance imaging when they made yes/no responses to the questions whether they believe or think that a trait adjective describes themselves or a celebrity. We found that, relative to thinking, believing was characterized with better memory of self-related adjectives. Moreover, believing (vs...
May 17, 2017: NeuroImage
https://www.readbyqxmd.com/read/28527748/high-levels-of-time-contraction-in-young-children-in-dual-tasks-are-related-to-their-limited-attention-capacities
#20
Quentin Hallez, Sylvie Droit-Volet
Numerous studies have shown that durations are judged shorter in a dual-task condition than in a simple-task condition. The resource-based theory of time perception suggests that this is due to the processing of temporal information, which is a demanding cognitive task that consumes limited attention resources. Our study investigated whether this time contraction in a dual-task condition is greater in younger children and, if so, whether this is specifically related to their limited attention capacities. Children aged 5-7years were given a temporal reproduction task in a simple-task condition and a dual-task condition...
May 18, 2017: Journal of Experimental Child Psychology
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