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Distributed cognition

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https://www.readbyqxmd.com/read/29143707/effect-of-multi-micronutrient-fortified-rice-on-cognitive-performance-depends-on-premix-composition-and-cognitive-function-tested-results-of-an-effectiveness-study-in-cambodian-schoolchildren
#1
Marion Fiorentino, Marlène Perignon, Khuov Kuong, Richard de Groot, Megan Parker, Kurt Burja, Marjoleine A Dijkhuizen, Sek Sokhom, Chhoun Chamnan, Jacques Berger, Frank T Wieringa
OBJECTIVE: Even though current policy is strongly focused on the crucial first '1000 days', it might be still possible to enhance cognitive function during the pre-adolescent and adolescent years by improving micronutrient status. In Cambodia, nutritional status is poor. Provision of rice fortified with micronutrients through a school meal programme (SMP) could be a cost-effective strategy to help improve health and school performance. The present study aimed to evaluate the effect of three different micronutrient-fortified rice formulations on cognitive function in Cambodian children...
November 16, 2017: Public Health Nutrition
https://www.readbyqxmd.com/read/29143409/chronnectome-fingerprinting-identifying-individuals-and-predicting-higher-cognitive-functions-using-dynamic-brain-connectivity-patterns
#2
Jin Liu, Xuhong Liao, Mingrui Xia, Yong He
The human brain is a large, interacting dynamic network, and its architecture of coupling among brain regions varies across time (termed the "chronnectome"). However, very little is known about whether and how the dynamic properties of the chronnectome can characterize individual uniqueness, such as identifying individuals as a "fingerprint" of the brain. Here, we employed multiband resting-state functional magnetic resonance imaging data from the Human Connectome Project (N = 105) and a sliding time-window dynamic network analysis approach to systematically examine individual time-varying properties of the chronnectome...
November 15, 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/29143250/cliques-and-cavities-in-the-human-connectome
#3
Ann E Sizemore, Chad Giusti, Ari Kahn, Jean M Vettel, Richard F Betzel, Danielle S Bassett
Encoding brain regions and their connections as a network of nodes and edges captures many of the possible paths along which information can be transmitted as humans process and perform complex behaviors. Because cognitive processes involve large, distributed networks of brain areas, principled examinations of multi-node routes within larger connection patterns can offer fundamental insights into the complexities of brain function. Here, we investigate both densely connected groups of nodes that could perform local computations as well as larger patterns of interactions that would allow for parallel processing...
November 16, 2017: Journal of Computational Neuroscience
https://www.readbyqxmd.com/read/29141818/does-including-the-full-cvlt-ii-and-bvmt-r-improve-bicams-evidence-from-a-belgian-dutch-validation-study
#4
Lars Costers, Jeroen Gielen, Piet L Eelen, Jeroen Van Schependom, Jorne Laton, Ann Van Remoortel, Ellen Vanzeir, Bart Van Wijmeersch, Pierrette Seeldrayers, Marie-Claire Haelewyck, Miguel D'Haeseleer, Marie-Beatrice D'hooghe, Dawn Langdon, Guy Nagels
BACKGROUND: The Brief International Cognitive Assessment for Multiple Sclerosis (BICAMS) is a fast, easy-to-administer and already widely validated neuropsychological battery for cognition in multiple sclerosis. OBJECTIVE: The goals of our study were to validate the BICAMS in a Belgian Dutch-speaking population and to investigate to what extent including extensive versions of two of the three BICAMS subtests improved its psychometric qualities. METHODS: Ninety-seven persons with MS and ninety-seven healthy controls were included and group-matched on age, education level and gender...
November 2017: Multiple Sclerosis and related Disorders
https://www.readbyqxmd.com/read/29140857/that-s-inappropriate-social-norms-in-an-older-population-based-cohort
#5
Mary Ganguli, Zhaowen Sun, Eric McDade, Beth Snitz, Tiffany Hughes, Erin Jacobsen, Chung-Chou H Chang
BACKGROUND: Social cognition is not routinely assessed in older adults. We report population-based normative data on the Social Norms Questionnaire (SNQ22) which asks individuals about the appropriateness of specific behaviors in hypothetical scenarios, errors being related either to breaking with norms or to over-adhering to perceived norms. Total SNQ scores represent the number of correct responses while subscale scores are error totals. METHODS: We administered the SNQ22 to 744 adults aged 65+ within a population-based study, and examined the distribution of scores by demographics, other cognitive measures, and Clinical Dementia Rating (CDR)...
November 14, 2017: Alzheimer Disease and Associated Disorders
https://www.readbyqxmd.com/read/29140499/simple-arithmetic-not-so-simple-for-highly-math-anxious-individuals
#6
Hyesang Chang, Lisa Sprute, Erin A Maloney, Sian L Beilock, Marc G Berman
Fluency with simple arithmetic, typically achieved in early elementary school, is thought to be one of the building blocks of mathematical competence. Behavioral studies with adults indicate that math anxiety (feelings of tension or apprehension about math) is associated with poor performance on cognitively demanding math problems. However, it remains unclear whether there are fundamental differences in how high and low math anxious individuals approach overlearned simple arithmetic problems that are less reliant on cognitive control...
November 11, 2017: Social Cognitive and Affective Neuroscience
https://www.readbyqxmd.com/read/29138289/the-evolution-of-cortical-development-the-synapsid-diapsid-divergence
#7
REVIEW
Andre M Goffinet
The cerebral cortex covers the rostral part of the brain and, in higher mammals and particularly humans, plays a key role in cognition and consciousness. It is populated with neuronal cell bodies distributed in radially organized layers. Understanding the common and lineage-specific molecular mechanisms that orchestrate cortical development and evolution are key issues in neurobiology. During evolution, the cortex appeared in stem amniotes and evolved divergently in two main branches of the phylogenetic tree: the synapsids (which led to present day mammals) and the diapsids (reptiles and birds)...
November 15, 2017: Development
https://www.readbyqxmd.com/read/29138080/muscarinic-receptor-subtype-distribution-in-the-central-nervous-system-and-relevance-to-aging-and-alzheimer-s-disease
#8
REVIEW
E P Lebois, C Thorn, J R Edgerton, M Popiolek, S Xi
Muscarinic acetylcholine receptors (mAChRs) are G proteincoupled receptors (GPCRs) that mediate the metabotropic actions of acetylcholine (ACh). There are five subtypes of mAChR, M1 - M5, which are expressed throughout the central nervous system (CNS) on numerous cell types and represent promising treatment targets for a number of different diseases, disorders, and conditions of the CNS. Although the present review will focus on Alzheimer's disease (AD) and amnestic mild cognitive impairment (aMCI), a number of conditions such as Parkinson's disease (PD), schizophrenia, and others represent significant unmet medical needs for which selective muscarinic agents could offer therapeutic benefits...
November 11, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/29137545/exploring-the-perceived-health-benefits-of-singing-in-a-choir-an-international-cross-sectional-mixed-methods-study
#9
Hilary Moss, Julie Lynch, Jessica O'Donoghue
AIM: This mixed-methods exploratory study investigates the perceived health benefits of singing in a choir from an international sample of choristers. METHOD: An online questionnaire including demographic information, 28 quantitative statements and two qualitative questions relating to the perceived health benefits of singing in a choir was distributed via email and social media over a period of 4 months to a sample of 1,779 choristers. Basic descriptives and comparisons between subgroups of the sample are presented along with thematic analysis of qualitative comments...
November 1, 2017: Perspectives in Public Health
https://www.readbyqxmd.com/read/29136240/postmortem-autopsy-confirmation-of-antemortem-f-18-fddnp-pet-scans-in-a-football-player-with-chronic-traumatic-encephalopathy
#10
Bennet Omalu, Gary W Small, Julian Bailes, Linda M Ercoli, David A Merrill, Koon-Pong Wong, Sung-Cheng Huang, Nagichettiar Satyamurthy, Jennifer L Hammers, John Lee, Robert P Fitzsimmons, Jorge R Barrio
Currently, only presumptive diagnosis of chronic traumatic encephalopathy (CTE) can be made in living patients. We present a modality that may be instrumental to the definitive diagnosis of CTE in living patients based on brain autopsy confirmation of [F-18]FDDNP-PET findings in an American football player with CTE. [F-18]FDDNP-PET imaging was performed 52 mo before the subject's death. Relative distribution volume parametric images and binding values were determined for cortical and subcortical regions of interest...
November 10, 2017: Neurosurgery
https://www.readbyqxmd.com/read/29132624/the-value-of-ehr-based-assessment-of-physician-competency-an-investigative-effort-with-internal-medicine-physicians
#11
Kimberly Venta, Erin Baker, Cali Fidopiastis, Kay Stanney
OBJECTIVE: The purpose of this study was to investigate the potential of developing an EHR-based model of physician competency, named the Skill Deficiency Evaluation Toolkit for Eliminating Competency-loss Trends (Skill-DETECT), which presents the opportunity to use EHR-based models to inform selection of Continued Medical Education (CME) opportunities specifically targeted at maintaining proficiency. METHODS: The IBM Explorys platform provided outpatient Electronic Health Records (EHRs) representing 76 physicians with over 5000 patients combined...
December 2017: International Journal of Medical Informatics
https://www.readbyqxmd.com/read/29130059/inter-and-intra-individual-variation-in-emotional-complexity-methodological-considerations-and-theoretical-implications
#12
Anthony D Ong, Alex J Zautra, Patrick H Finan
The degree of relationship between positive and negative emotional states or emotional complexity is a topic of ongoing methodological and theoretical debate. At issue is whether positive and negative emotions are opposite ends of a bipolar continuum or independent dimensions in a bivariate distribution with little degree of overlap. In this review, we summarize a body of work suggesting that the distinction between positive and negative emotions varies both between and within individuals over time as a function of cognition and changes in informational demands, a perspective called the Dynamic Model of Affect (DMA)...
June 2017: Current Opinion in Behavioral Sciences
https://www.readbyqxmd.com/read/29129676/exercise-enhances-cognitive-function-and-neurotrophin-expression-in-the-hippocampus-accompanied-by-changes-in-epigenetic-programming-in-senescence-accelerated-mice
#13
Hiroshi Maejima, Naohiko Kanemura, Takanori Kokubun, Kenji Murata, Kiyomi Takayanagi
Aerobic exercise is known to increase expression of neurotrophins, particularly brain-derived neurotrophic factor (BDNF), in the hippocampus and to improve cognitive function. Exercise exerts neuroprotective effects in the hippocampus by inducing epigenetic changes, which play crucial roles in aging and neurodegenerative diseases. Specifically, the activity levels of histone acetyltransferases (HATs) and histone deacetylases (HDACs) regulate histone acetylation and modulate gene transcription. The objective of the present study was to assess the interactive effects of exercise and aging on cognitive function, expression of neurotrophins (BDNF and neurotrophin-4) and their receptors (tyrosine receptor kinase B and p75), and epigenetic regulations, including the activity of HATs and HADCs in the hippocampus...
November 9, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/29128872/prenatal-kynurenine-treatment-in-rats-causes-schizophrenia-like-broad-monitoring-deficits-in-adulthood
#14
Britta Hahn, Carolyn H Reneski, Ana Pocivavsek, Robert Schwarcz
RATIONALE: Elevated brain kynurenic acid (KYNA) levels are implicated in the pathology and neurodevelopmental pathogenesis of schizophrenia. In rats, embryonic treatment with kynurenine (EKyn) causes elevated brain KYNA levels in adulthood and cognitive deficits reminiscent of schizophrenia. OBJECTIVES: Growing evidence suggests that people with schizophrenia have a narrowed attentional focus, and we aimed at establishing whether these abnormalities may be related to KYNA dysregulation...
November 11, 2017: Psychopharmacology
https://www.readbyqxmd.com/read/29128118/associations-between-inflammatory-markers-and-cognitive-function-in-breast-cancer-patients-receiving-chemotherapy
#15
AnnaLynn M Williams, Raven Shah, Michelle Shayne, Alissa J Huston, Marcia Krebs, Nicole Murray, Bryan D Thompson, Kassandra Doyle, Jenna Korotkin, Edwin van Wijngaarden, Sharon Hyland, Jan A Moynihan, Deborah A Cory-Slechta, Michelle C Janelsins
BACKGROUND: Cancer-related cognitive impairment (CRCI) is often related to chemotherapy. Increased chronic inflammation is believed to play a key role in the development of CRCI related to chemotherapy but studies assessing this hypothesis specifically in patients receiving chemotherapy are rare. METHODS: We assessed several cognitive domains using the Cambridge Neuropsychological Test Automated Battery (CANTAB) in twenty-two breast cancer patients currently receiving chemotherapy...
October 18, 2017: Journal of Neuroimmunology
https://www.readbyqxmd.com/read/29127776/working-memory-capacity-and-intra-individual-variability-of-proactive-control
#16
Elizabeth A Wiemers, Thomas S Redick
Two datasets of 110 young adults were examined to investigate the relationship between individual differences in working memory capacity (WMC) and dynamic cognitive control. The results delve into the specific differences between high- and low-WMC individuals' ability to enact and maintain cognitive control using the AX version of the continuous performance test (AX-CPT). Compared to high-WMC individuals, low-WMC individuals: (a) made more errors, specifically to AX targets; (b) exhibited a partial shift to proactive control with more time-on-task; (c) had more exaggerated slower AX target responses in the tail of the response time distribution; and (d) were equally likely to adjust control after conflict...
November 8, 2017: Acta Psychologica
https://www.readbyqxmd.com/read/29127660/exposure-to-a-sublethal-concentration-of-imidacloprid-and-the-side-effects-on-target-and-nontarget-organs-of-apis-mellifera-hymenoptera-apidae
#17
Aline Fernanda Catae, Thaisa Cristina Roat, Marcel Pratavieira, Anally Ribeiro da Silva Menegasso, Mario Sergio Palma, Osmar Malaspina
The use of insecticides has become increasingly frequent, and studies indicate that these compounds are involved in the intoxication of bees. Imidacloprid is a widely used neonicotinoid; thus, we have highlighted the importance of assessing its oral toxicity to Africanized bees and used transmission electron microscopy to investigate the sublethal effects in the brain, the target organ, and the midgut, responsible for the digestion/absorption of food. In addition, the distribution of proteins involved in important biological processes in the brain were evaluated on the 1st day of exposure by MALDI-imaging analysis...
November 10, 2017: Ecotoxicology
https://www.readbyqxmd.com/read/29126580/codebook-based-electrooculography-data-analysis-towards-cognitive-activity-recognition
#18
P Lagodzinski, K Shirahama, M Grzegorzek
With the advancement in mobile/wearable technology, people started to use a variety of sensing devices to track their daily activities as well as health and fitness conditions in order to improve the quality of life. This work addresses an idea of eye movement analysis, which due to the strong correlation with cognitive tasks can be successfully utilized in activity recognition. Eye movements are recorded using an electrooculographic (EOG) system built into the frames of glasses, which can be worn more unobtrusively and comfortably than other devices...
October 28, 2017: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/29124823/differences-between-child-and-adult-large-scale-functional-brain-networks-for-reading-tasks
#19
Xin Liu, Yue Gao, Qiqi Di, Jiali Hu, Chunming Lu, Yun Nan, James R Booth, Li Liu
Reading is an important high-level cognitive function of the human brain, requiring interaction among multiple brain regions. Revealing differences between children's large-scale functional brain networks for reading tasks and those of adults helps us to understand how the functional network changes over reading development. Here we used functional magnetic resonance imaging data of 17 adults (19-28 years old) and 16 children (11-13 years old), and graph theoretical analyses to investigate age-related changes in large-scale functional networks during rhyming and meaning judgment tasks on pairs of visually presented Chinese characters...
November 9, 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/29123175/structure-constrained-by-metadata-in-networks-of-chess-players
#20
Nahuel Almeira, Ana L Schaigorodsky, Juan I Perotti, Orlando V Billoni
Chess is an emblematic sport that stands out because of its age, popularity and complexity. It has served to study human behavior from the perspective of a wide number of disciplines, from cognitive skills such as memory and learning, to aspects like innovation and decision-making. Given that an extensive documentation of chess games played throughout history is available, it is possible to perform detailed and statistically significant studies about this sport. Here we use one of the most extensive chess databases in the world to construct two networks of chess players...
November 9, 2017: Scientific Reports
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