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https://www.readbyqxmd.com/read/29342226/don-t-judge-a-book-by-its-cover-examiner-expectancy-effects-predict-neuropsychological-performance-for-individuals-judged-as-chronic-cannabis-users
#1
Louise M Sodos, Rayna B Hirst, Jessica Watson, Dylan Vaughn
Objective: The experimenter expectancy effect confound remains largely unexplored in neuropsychological research and has never been investigated among cannabis users. This study investigated whether examiner expectancies of cannabis user status affected examinees' neuropsychological performance. Method: Participants included 41 cannabis users and 20 non-users. Before testing, examiners who were blind to participant user status privately rated whether they believed the examinee was a cannabis user or non-user...
January 12, 2018: Archives of Clinical Neuropsychology: the Official Journal of the National Academy of Neuropsychologists
https://www.readbyqxmd.com/read/29341891/long-term-treadmill-exercise-improves-memory-impairment-through-restoration-of-decreased-synaptic-adhesion-molecule-1-2-3-induced-by-transient-cerebral-ischemia-in-the-aged-gerbil-hippocampus
#2
Ji Hyeon Ahn, Joon Ha Park, Jinseu Park, Myoung Cheol Shin, Jun Hwi Cho, In Hye Kim, Jeong-Hwi Cho, Tae-Kyeong Lee, Jae-Chul Lee, Bich Na Shin, Young-Myeong Kim, Choong Hyun Lee, In Koo Hwang, Il Jun Kang, Bai Hui Chen, Bing Chun Yan, Young Joo Lee, Moo-Ho Won, Soo Young Choi
Exercise improves cognitive impairments induced by transient cerebral ischemia and modulates synaptic adhesion molecules. In this study, we investigated effects of long-term treadmill exercise on cognitive impairments and its relation to changes of synaptic cell adhesion molecule (SynCAM) 1/2/3 in the hippocampus after 5 min of transient cerebral ischemia in aged gerbils. Animals were assigned to sedentary and exercised groups, given treadmill exercise for 4 consecutive weeks from 5 days after transient ischemia and evaluated cognitive function through passive avoidance test and Morris water maze test...
January 13, 2018: Experimental Gerontology
https://www.readbyqxmd.com/read/29341465/p2y12-deficiency-in-mouse-impairs-noradrenergic-system-in-brain-and-alters-anxiety-like-neurobehavior-and-memory
#3
Fang Zheng, Qiang Zhou, Yin Cao, Hailian Shi, Hui Wu, Beibei Zhang, Fei Huang, Xiaojun Wu
Purinergic receptor P2Y12 (P2Y12 ), a G protein-coupled (GPCR) purinergic receptor, is widely distributed in nervous system and involved in the progression of neurological diseases such as multiple sclerosis and neuropathic pain. The central noradrenergic system actively participates in a number of neurophysiological processes. Nevertheless, whether there is any direct relevance between P2Y12 and noradrenergic signal transduction remains unknown. In the present study, we tested the hypothesis that lack of P2Y12 impaired noradrenergic signal transduction in mouse brain...
January 17, 2018: Genes, Brain, and Behavior
https://www.readbyqxmd.com/read/29341323/test-retest-reliability-and-longitudinal-analysis-of-automated-hippocampal-subregion-volumes-in-healthy-ageing-and-alzheimer-s-disease-populations
#4
Amanda Worker, Danai Dima, Anna Combes, William R Crum, Johannes Streffer, Steven Einstein, Mitul A Mehta, Gareth J Barker, Steve C R Williams, Owen O'daly
The hippocampal formation is a complex brain structure that is important in cognitive processes such as memory, mood, reward processing and other executive functions. Histological and neuroimaging studies have implicated the hippocampal region in neuropsychiatric disorders as well as in neurodegenerative diseases. This highly plastic limbic region is made up of several subregions that are believed to have different functional roles. Therefore, there is a growing interest in imaging the subregions of the hippocampal formation rather than modelling the hippocampus as a homogenous structure, driving the development of new automated analysis tools...
January 16, 2018: Human Brain Mapping
https://www.readbyqxmd.com/read/29341303/cardiorespiratory-fitness-is-associated-with-enhanced-hippocampal-functional-connectivity-in-healthy-young-adults
#5
Chelsea M Stillman, Fatma Uyar, Haiqing Huang, George A Grove, Jennifer C Watt, Mariegold E Wollam, Kirk I Erickson
Consistent associations have been found between higher cardiorespiratory fitness (CRF) and indices of enhanced brain health and function, including behavioral measures of cognition as well as neuroimaging indicators such as regional brain volume. Several studies have reported that higher CRF levels are associated with a larger hippocampus, yet associations between volume and memory or functional connectivity metrics with the hippocampus remain poorly understood. Using a multi-modal framework, we hierarchically examine the association between CRF and hippocampal volume and resting state functional connectivity (rsFC) in younger adults (ages 22-38), as well as the relationship between these imaging markers and memory function...
January 17, 2018: Hippocampus
https://www.readbyqxmd.com/read/29341214/cue-reactivity-habituation-and-eating-in-the-absence-of-hunger-in-children-with-loss-of-control-eating-and-attention-deficit-hyperactivity-disorder
#6
Anja Hilbert, Susanne Kurz, Daniela Dremmel, Susann Weihrauch Blüher, Simone Munsch, Ricarda Schmidt
OBJECTIVE: Childhood loss of control (LOC) eating and attention-deficit/hyperactivity disorder (ADHD) are highly comorbid conditions and present with disordered eating behaviors, such as overeating. This study sought to delineate shared and specific abnormalities in physiological, cognitive-motivational, and behavioral components of food-specific impulsivity in children with LOC eating and ADHD. Specifically, children's reactivity and habituation to food and eating in the absence of hunger were examined...
January 17, 2018: International Journal of Eating Disorders
https://www.readbyqxmd.com/read/29341070/personality-changes-during-the-transition-from-cognitive-health-to-mild-cognitive-impairment
#7
Richard J Caselli, Blake T Langlais, Amylou C Dueck, Bruce R Henslin, Travis A Johnson, Bryan K Woodruff, Charlene Hoffman-Snyder, Dona E C Locke
BACKGROUND/OBJECTIVES: Behavioral problems in individuals with Alzheimer's disease (AD) impose major management challenges. Current prevention strategies are anchored to cognitive outcomes, but behavioral outcomes may provide another, clinically relevant opportunity for preemptive therapy. We sought to determine whether personality changes that predispose to behavioral disorders arise during the transition from preclinical AD to mild cognitive impairment (MCI). DESIGN: Longitudinal observational cohort study...
January 17, 2018: Journal of the American Geriatrics Society
https://www.readbyqxmd.com/read/29341049/-long-term-outcome-after-prenatal-drug-exposure
#8
Ludwig Gortner, Sascha Meyer
Although prenatal exposure to opioids, cannabinoids and cocaine is a frequent problem, only scarce data have been published on the long-term outcome in affected children and adolescents. While opioid-exposed children up to the age of 2 years show a reduced motor developmental pattern, data from meta-analyses up to adolescence show a strong trend for reduced performance with regard to cognitive function and behavior. Follow-up data after intrauterine cannabinoid exposure indicate reduced cognitive and reading abilities as well as abnormal findings in complex planning tests...
January 16, 2018: Zeitschrift Für Geburtshilfe und Neonatologie
https://www.readbyqxmd.com/read/29340965/emotional-and-social-characteristics-of-stroke-patients-with-low-verbal-memory
#9
Ewa Zawadzka, Łucja Domańska
BACKGROUND: Cognitive deficits, especially problems with memory observed after stroke often coexist with patients' experience of difficulties in everyday life situations. AIMS: The purposes of the study were to explore the relationships between verbal memory, emotional functioning and social competence in stroke patients, and to examine the emotional and social condition of stroke patients with low verbal memory. METHODS: Ninety-five participants were assessed with the Rey Auditory Verbal Learning Test, the Neuropsychology Behavior and Affect Profile, and the Social Competency Questionnaire...
January 17, 2018: Aging Clinical and Experimental Research
https://www.readbyqxmd.com/read/29340902/validation-study-of-the-abbreviated-version-of-the-lubben-social-network-scale-spanish-translation-among-mexican-and-mexican-american-older-adults
#10
Mireya Vilar-Compte, Arturo Vargas-Bustamante, James Lubben
PURPOSE: To perform a face validity study of the Spanish version of the Lubben Social Network Scale (LSNS-6) among Mexican and Mexican-American older adults. DESIGN AND METHODS: A cross-national qualitative descriptive approach, based on cognitive survey testing and cross-cultural equivalence analysis, was followed to assess the face validity of the Spanish version of the LSNS-6. Data were collected through 2 focus groups in Los Angeles (LA) and 4 in Mexico City (CDMX)...
January 16, 2018: Journal of Cross-cultural Gerontology
https://www.readbyqxmd.com/read/29340772/the-influence-of-passionate-love-on-self-other-discrimination-during-joint-action
#11
Virginie Quintard, Stéphane Jouffre, Jean-Claude Croizet, Cedric A Bouquet
Prior research on romantic relationships suggests that being in love involves a blurring of self-other cognitive boundaries. However, this research has focused so far on conceptual self-representation, related to the individual's traits or interests. The present study tested the hypothesis that passionate love involves a reduced discrimination between the self and the romantic partner at a bodily level, as indexed by an increased Joint Simon effect (JSE), and we further examined whether this self-other discrimination correlated with the passion felt for the partner...
January 16, 2018: Psychological Research
https://www.readbyqxmd.com/read/29340569/associations-of-the-top-20-alzheimer-disease-risk-variants-with-brain-amyloidosis
#12
Liana G Apostolova, Shannon L Risacher, Tugce Duran, Eddie C Stage, Naira Goukasian, John D West, Triet M Do, Jonathan Grotts, Holly Wilhalme, Kwangsik Nho, Meredith Phillips, David Elashoff, Andrew J Saykin
Importance: Late-onset Alzheimer disease (AD) is highly heritable. Genome-wide association studies have identified more than 20 AD risk genes. The precise mechanism through which many of these genes are associated with AD remains unknown. Objective: To investigate the association of the top 20 AD risk variants with brain amyloidosis. Design, Setting, and Participants: This study analyzed the genetic and florbetapir F 18 data from 322 cognitively normal control individuals, 496 individuals with mild cognitive impairment, and 159 individuals with AD dementia who had genome-wide association studies and 18F-florbetapir positron emission tomographic data from the Alzheimer's Disease Neuroimaging Initiative (ADNI), a prospective, observational, multisite tertiary center clinical and biomarker study...
January 16, 2018: JAMA Neurology
https://www.readbyqxmd.com/read/29340317/intradialytic-cognitive-and-exercise-training-may-preserve-cognitive-function
#13
Mara A McAdams-DeMarco, Jonathan Konel, Fatima Warsame, Hao Ying, Marlís González Fernández, Michelle C Carlson, Derek M Fine, Lawrence J Appel, Dorry L Segev
Introduction: Cognitive decline is common and increases mortality risk in hemodialysis patients. Intradialytic interventions like cognitive training (CT) and exercise training (ET) may preserve cognitive function. Methods: We conducted a pilot randomized controlled trial of 20 hemodialysis patients to study the impact of 3 months of intradialytic CT (tablet-based brain games) (n = 7), ET (foot peddlers) (n = 6), or standard of care (SC) (n = 7) on cognitive function...
January 2018: KI Reports
https://www.readbyqxmd.com/read/29339966/acute-diesel-exhaust-exposure-and-postural-stability-a-controlled-crossover-experiment
#14
Jason Curran, Rachel Cliff, Nadine Sinnen, Michael Koehle, Chris Carlsten
Recent epidemiological evidence connects ambient air pollutants to adverse neurobehavioural effects in adults. In animal models, subchronic controlled exposures to diesel exhaust (DE) have also showed evidence of neuroinflammation. Evidence suggests that DE not only affects outcomes commonly associated with cognitive dysfunction, but also balance impairment. We conducted a controlled human exposure experiment with 28 healthy subjects (average age = 28 years (SD = 7.1; range = 21-49); and 40% female) who were exposed to two conditions, filtered air (FA) and DE (300 μg PM2...
2018: Journal of Occupational Medicine and Toxicology
https://www.readbyqxmd.com/read/29339837/validation-of-the-brief-international-cognitive-assessment-for-multiple-sclerosis-in-japan
#15
Masaaki Niino, Toshiyuki Fukazawa, Jun-Ichi Kira, Tatsusada Okuno, Masahiro Mori, Nobuo Sanjo, Takashi Ohashi, Hikoaki Fukaura, Juichi Fujimori, Yuko Shimizu, Nobuhiro Mifune, Yusei Miyazaki, Eri Takahashi, Seiji Kikuchi, Dawn Langdon, Ralph Hb Benedict, Makoto Matsui
Background: The Brief International Cognitive Assessment for MS (BICAMS) is a practical battery for measuring cognitive function in multiple sclerosis (MS). Objectives: We aimed to validate a Japanese version of the BICAMS in patients with MS and healthy controls. Methods: The Symbol Digit Modalities Test (SDMT), the California Verbal Learning Test-Second Edition (CVLT2) and the Brief Visuospatial Memory Test Revised (BVMTR) were administered to 156 patients with MS and 126 healthy controls (HCs)...
October 2017: Multiple Sclerosis Journal—Experimental, Translational and Clinical
https://www.readbyqxmd.com/read/29339315/insulin-sensitivity-predicts-brain-network-connectivity-following-a-meal
#16
John P Ryan, Helmet T Karim, Howard J Aizenstein, Nicole L Helbling, Frederico G S Toledo
There is converging evidence that insulin plays a role in food-reward signaling in the brain and has effects on enhancing cognition. Little is known about how these effects are altered in individuals with insulin resistance. The present study was designed to identify the relationships between insulin resistance and functional brain connectivity following a meal. Eighteen healthy adults (7 male, 11 female, age: 41-57 years-old) completed a frequently-sampled intravenous glucose tolerance test to quantify insulin resistance...
January 12, 2018: NeuroImage
https://www.readbyqxmd.com/read/29339311/general-crystallized-and-fluid-intelligence-are-not-associated-with-functional-global-network-efficiency-a-replication-study-with-the-human-connectome-project-1200-data-set
#17
J D Kruschwitz, L Waller, L S Daedelow, H Walter, I M Veer
One hallmark example of a link between global topological network properties of complex functional brain connectivity and cognitive performance is the finding that general intelligence may depend on the efficiency of the brain's intrinsic functional network architecture. However, although this association has been featured prominently over the course of the last decade, the empirical basis for this broad association of general intelligence and global functional network efficiency is quite limited. In the current study, we set out to replicate the previously reported association between general intelligence and global functional network efficiency using the large sample size and high quality data of the Human Connectome Project, and extended the original study by testing for separate association of crystallized and fluid intelligence with global efficiency, characteristic path length, and global clustering coefficient...
January 12, 2018: NeuroImage
https://www.readbyqxmd.com/read/29339310/distant-from-input-evidence-of-regions-within-the-default-mode-network-supporting-perceptually-decoupled-and-conceptually-guided-cognition
#18
Charlotte Murphy, Elizabeth Jefferies, Shirley-Ann Rueschemeyer, Mladen Sormaz, Hao-Ting Wang, Daniel S Margulies, Jonathan Smallwood
The default mode network supports a variety of mental operations such as semantic processing, episodic memory retrieval, mental time travel and mind-wandering, yet the commonalities between these functions remains unclear. One possibility is that this system supports cognition that is independent of the immediate environment; alternatively or additionally, it might support higher-order conceptual representations that draw together multiple features. We tested these accounts using a novel paradigm that separately manipulated the availability of perceptual information to guide decision-making and the representational complexity of this information...
January 12, 2018: NeuroImage
https://www.readbyqxmd.com/read/29339018/nicotine-alleviates-chronic-stress-induced-anxiety-and-depressive-like-behavior-and-hippocampal-neuropathology-via-regulating-autophagy-signaling
#19
Xi Xiao, Xueliang Shang, Baohui Zhai, Hui Zhang, Tao Zhang
Recently, we reported that chronic nicotine significantly improved chronic stress-induced impairments of cognition and the hippocampal synaptic plasticity in mice, however, the underlying mechanism still needs to be explored. In the present study, 32 male C57BL/6 mice were divided into four groups: control (CON), stress (CUS), stress with chronic nicotine administration (CUS + Nic) and chronic nicotine administration (Nic). The anxiety-like behavior and neuropathological alteration of DG neurons were examined...
January 12, 2018: Neurochemistry International
https://www.readbyqxmd.com/read/29339005/effects-of-exercise-and-enrichment-on-behaviour-in-cd-1-mice
#20
Amiirah B Aujnarain, Owen D Luo, Natalie Taylor, Jonathan K Y Lai, Jane A Foster
A host of scholarly work has characterized the positive effects of exercise and environmental enrichment on behaviour and cognition in animal studies. The purpose of this study was to investigate the uptake and longitudinal impact of exercise and enrichment on the behavioural phenotype of male and female CD-1 mice. CD-1 mice housed in standard (STD) or exercise and enrichment (EE) conditions post-weaning were tested in the 3-chamber sociability test, open field, and elevated plus maze and exercise activity was monitored throughout the enrichment protocol...
January 12, 2018: Behavioural Brain Research
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