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https://www.readbyqxmd.com/read/28725993/are-young-children-able-to-learn-exploratory-strategies-by-observation
#1
Francesca Foti, Domenico Martone, Stefania Orrù, Simone Montuori, Esther Imperlini, Pasqualina Buono, Laura Petrosini, Laura Mandolesi
New competencies may be learned through active experience (experiential learning or learning by doing) or observation of others' experiences (learning by observation). Observing another person performing a complex action facilitates the observer's acquisition of the same action. The present research is aimed at analyzing if the observation of specific explorative strategies adopted in a constrained environment, such as the Radial Arm Maze (RAM), could help young children to explore the maze and to build a cognitive spatial map of the explored environment...
July 20, 2017: Psychological Research
https://www.readbyqxmd.com/read/28725174/altered-functional-connectivity-following-an-inflammatory-white-matter-injury-in-the-newborn-rat-a-high-spatial-and-temporal-resolution-intrinsic-optical-imaging-study
#2
Edgar Guevara, Wyston C Pierre, Camille Tessier, Luis Akakpo, Irène Londono, Frédéric Lesage, Gregory A Lodygensky
Very preterm newborns have an increased risk of developing an inflammatory cerebral white matter injury that may lead to severe neuro-cognitive impairment. In this study we performed functional connectivity (fc) analysis using resting-state optical imaging of intrinsic signals (rs-OIS) to assess the impact of inflammation on resting-state networks (RSN) in a pre-clinical model of perinatal inflammatory brain injury. Lipopolysaccharide (LPS) or saline injections were administered in postnatal day (P3) rat pups and optical imaging of intrinsic signals were obtained 3 weeks later...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28716966/hierarchically-organized-medial-frontal-cortex-basal-ganglia-loops-selectively-control-task-and-response-selection
#3
Franziska M Korb, Jiefeng Jiang, Joseph A King, Tobias Egner
Adaptive behavior requires context-sensitive configuration of task-sets that specify time-varying stimulus-response mappings. Intriguingly, response time costs associated with changing task-sets and motor responses are known to be strongly interactive: switch costs at the task-level are small in the presence of a response-switch but large when accompanied by a response-repetition, and vice versa for response-switch costs. The reasons behind this well-known inter-dependence between task- and response-level control processes are currently not well understood...
July 17, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28716714/functional-density-and-edge-maps-characterizing-functional-architecture-in-individuals-and-improving-cross-subject-registration
#4
Tong Tong, Iman Aganj, Tian Ge, Jonathan R Polimeni, Bruce Fischl
Population-level inferences and individual-level analyses are two important aspects in functional magnetic resonance imaging (fMRI) studies. Extracting reliable and informative features from fMRI data that capture biologically meaningful inter-subject variation is critical for aligning and comparing functional networks across subjects, and connecting the properties of functional brain organization with variations in behavior, cognition and genetics. In this study, we derive two new measures, which we term functional density map and edge map, and demonstrate their usefulness in characterizing the function of individual brains...
July 14, 2017: NeuroImage
https://www.readbyqxmd.com/read/28716520/modeling-color-preference-using-color-space-metrics
#5
Karen B Schloss, Laurent Lessard, Chris Racey, Anya C Hurlbert
Studying color preferences provides a means to discover how perceptual experiences map onto cognitive and affective judgments. A challenge is finding a parsimonious way to describe and predict patterns of color preferences, which are complex with rich individual differences. One approach has been to model color preferences using factors from metric color spaces to establish direct correspondences between dimensions of color and preference. Prior work established that substantial, but not all, variance in color preferences could be captured by weights on color space dimensions using multiple linear regression...
July 14, 2017: Vision Research
https://www.readbyqxmd.com/read/28714186/the-pinocchio-effect-and-the-cold-stress-test-lies-and-thermography
#6
A Moliné, G Gálvez-García, J Fernández-Gómez, J De la Fuente, O Iborra, F Tornay, J L Mata Martín, M Puertollano, E Gómez Milán
We applied the use of thermography to cognitive neuropsychology, particularly as an objective marker of subjective experiences, in the context of lying. We conducted three experiments: (a) An important lie was invented by the participants in 3 min, and it was recounted by phone to a significant person while they were recorded by the thermographic camera, obtaining a face and hands map of the lie. (b) A similar methodology was carried out, but adding the Cold Stress Test (CST) of the dominant hand during the phone call, obtaining a second physiologic marker (the percentage of thermal recovery) to detect the lie...
July 17, 2017: Psychophysiology
https://www.readbyqxmd.com/read/28710800/dissociation-of-spatial-memory-systems-in-williams-syndrome
#7
Mathilde Bostelmann, Emilie Fragnière, Floriana Costanzo, Silvia Di Vara, Deny Menghini, Stefano Vicari, Pierre Lavenex, Pamela Banta Lavenex
Williams syndrome (WS), a genetic deletion syndrome, is characterized by severe visuospatial deficits affecting performance on both tabletop spatial tasks and on tasks which assess orientation and navigation. Nevertheless, previous studies of WS spatial capacities have ignored the fact that two different spatial memory systems are believed to contribute parallel spatial representations supporting navigation. The place learning system depends on the hippocampal formation and creates flexible relational representations of the environment, also known as cognitive maps...
July 15, 2017: Hippocampus
https://www.readbyqxmd.com/read/28708547/multimodal-fusion-with-reference-searching-for-joint-neuromarkers-of-working-memory-deficits-in-schizophrenia
#8
Shile Qi, Vince D Calhoun, Theo G M van Erp, Juan Bustillo, Eswar Damaraju, Jessica A Turner, Yuhui Du, Jian Yang, Jiayu Chen, Qingbao Yu, Daniel H Mathalon, Judith M Ford, James Voyvodic, Bryon A Mueller, Aysenil Belger, Sarah McEwen, Steven G Potkin, Adrian Preda, Tianzi Jiang, Jing Sui
By exploiting cross-information among multiple imaging data, multimodal fusion has often been used to better understand brain diseases. However, most current fusion approaches are blind, without adopting any prior information. There is increasing interest to uncover the neurocognitive mapping of specific clinical measurements on enriched brain imaging data; hence, a supervised, goal-directed model that employs prior information as a reference to guide multimodal data fusion is much needed and becomes a natural option...
July 11, 2017: IEEE Transactions on Medical Imaging
https://www.readbyqxmd.com/read/28708004/psychological-trait-resilience-within-ecological-systems-theory-the-resilient-systems-scales
#9
John Maltby, Liz Day, Heather D Flowe, Panos Vostanis, Sally Chivers
This project describes the development of the Resilient Systems Scales, created to address conceptual and methodological ambiguities in assessing the ecological systems model of resilience. Across a number of samples (total N = 986), our findings suggest that the Resilient Systems Scales show equivalence to a previously reported assessment (Maltby, Day, & Hall, 2015 ) in demonstrating the same factor structure, adequate intercorrelation between the 2 measures of resilience, and equivalent associations with personality and well-being...
July 14, 2017: Journal of Personality Assessment
https://www.readbyqxmd.com/read/28707157/parcellation-of-macaque-cortex-with-anatomical-connectivity-profiles
#10
Jiaojian Wang, Zhentao Zuo, Sangma Xie, Yifan Miao, Yuanye Ma, Xudong Zhao, Tianzi Jiang
The macaque model has been widely used to investigate the brain mechanisms of specific cognitive functions and psychiatric disorders. However, a detailed functional architecture map of the macaque cortex in vivo is still lacking. Here, we aimed to construct a new macaque cortex atlas based on its anatomical connectivity profiles using in vivo diffusion MRI. First, we defined the macaque cortical seed areas using the NeuroMaps atlas. Then, we applied the anatomical connectivity patterns-based parcellation approach to parcellate the macaque cortex into 80 subareas in each hemisphere, which were approximately symmetric between the two hemispheres...
July 13, 2017: Brain Topography
https://www.readbyqxmd.com/read/28704562/cerebral-18f-fdg-pet-in-macrophagic-myofasciitis-an-individual-svm-based-approach
#11
Paul Blanc-Durand, Axel Van Der Gucht, Eric Guedj, Mukedaisi Abulizi, Mehdi Aoun-Sebaiti, Lionel Lerman, Antoine Verger, François-Jérôme Authier, Emmanuel Itti
INTRODUCTION: Macrophagic myofasciitis (MMF) is an emerging condition with highly specific myopathological alterations. A peculiar spatial pattern of a cerebral glucose hypometabolism involving occipito-temporal cortex and cerebellum have been reported in patients with MMF; however, the full pattern is not systematically present in routine interpretation of scans, and with varying degrees of severity depending on the cognitive profile of patients. Aim was to generate and evaluate a support vector machine (SVM) procedure to classify patients between healthy or MMF 18F-FDG brain profiles...
2017: PloS One
https://www.readbyqxmd.com/read/28702349/distinct-multivariate-brain-morphological-patterns-and-their-added-predictive-value-with-cognitive-and-polygenic-risk-scores-in-mental-disorders
#12
Nhat Trung Doan, Tobias Kaufmann, Francesco Bettella, Kjetil Nordbø Jørgensen, Christine Lycke Brandt, Torgeir Moberget, Dag Alnæs, Gwenaëlle Douaud, Eugene Duff, Srdjan Djurovic, Ingrid Melle, Torill Ueland, Ingrid Agartz, Ole A Andreassen, Lars T Westlye
The brain underpinnings of schizophrenia and bipolar disorders are multidimensional, reflecting complex pathological processes and causal pathways, requiring multivariate techniques to disentangle. Furthermore, little is known about the complementary clinical value of brain structural phenotypes when combined with data on cognitive performance and genetic risk. Using data-driven fusion of cortical thickness, surface area, and gray matter density maps (GMD), we found six biologically meaningful patterns showing strong group effects, including four statistically independent multimodal patterns reflecting co-occurring alterations in thickness and GMD in patients, over and above two other independent patterns of widespread thickness and area reduction...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28701903/an-embodiment-perspective-on-number-space-mapping-in-3-5-year-old-dutch-children
#13
Jaccoline E van 't Noordende, M Chiel J M Volman, Paul P M Leseman, Evelyn H Kroesbergen
Previous research suggests that block adding, subtracting and counting direction are early forms of number-space mapping. In this study, an embodiment perspective on these skills was taken. Embodiment theory assumes that cognition emerges through sensory-motor interaction with the environment. In line with this assumption, it was investigated if counting and adding/subtracting direction in young children is related to the hand they use during task performance. Forty-eight 3.5-year-old children completed a block adding, subtracting and counting task...
May 2017: Infant and Child Development
https://www.readbyqxmd.com/read/28701481/place-and-grid-cells-in-a-loop-implications-for-memory-function-and-spatial-coding
#14
César Rennó-Costa, Adriano B L Tort
Place cells in the hippocampus and grid cells in the medial entorhinal cortex have different codes for space. However, how one code relates to the other is ill understood. Based on the anatomy of the entorhinal-hippocampal circuitry, we constructed a model of place and grid cells organized in a loop to investigate their mutual influence in the establishment of their codes for space. Using computer simulations, we first replicated experiments in rats that measured place and grid cell activity in different environments, and then assessed which features of the model account for different phenomena observed in neurophysiological data, such as pattern completion and pattern separation, global and rate remapping of place cells and realignment of grid cells...
July 12, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28701238/cognitive-stimulation-therapy-in-dementia-care-exploring-the-views-and-experiences-of-service-providers-on-the-barriers-and-facilitators-to-implementation-in-practice-using-normalization-process-theory
#15
Claire Dickinson, Grant Gibson, Zoe Gotts, Lynne Stobbart, Louise Robinson
BACKGROUND: Cognitive stimulation therapy (CST) is an evidence-based, cost-effective psychosocial intervention for people with dementia but is currently not a standard part of post-diagnostic care. This qualitative study explored the views and experiences of dementia care providers on the barriers and facilitators to its implementation in usual care. METHOD: Thirty four semi-structured interviews (24 participants) were conducted across four dementia care sites in the North of England; ten were follow-up interviews...
July 13, 2017: International Psychogeriatrics
https://www.readbyqxmd.com/read/28700619/intra-operative-multi-site-stimulation-expanding-methodology-for-cortical-brain-mapping-of-language-functions
#16
Tal Gonen, Tomer Gazit, Akiva Korn, Adi Kirschner, Daniella Perry, Talma Hendler, Zvi Ram
Direct cortical stimulation (DCS) is considered the gold-standard for functional cortical mapping during awake surgery for brain tumor resection. DCS is performed by stimulating one local cortical area at a time. We present a feasibility study using an intra-operative technique aimed at improving our ability to map brain functions which rely on activity in distributed cortical regions. Following standard DCS, Multi-Site Stimulation (MSS) was performed in 15 patients by applying simultaneous cortical stimulations at multiple locations...
2017: PloS One
https://www.readbyqxmd.com/read/28699122/improved-information-pooling-for-hierarchical-cognitive-models-through-multiple-and-covaried-regression
#17
R Anders, Z Oravecz, F-X Alario
Cognitive process models are fit to observed data to infer how experimental manipulations modify the assumed underlying cognitive process. They are alternatives to descriptive models, which only capture differences on the observed data level, and do not make assumptions about the underlying cognitive process. Process models may require more observations than descriptive models however, and as a consequence, usually fewer conditions can be simultaneously modeled with them. Unfortunately, it is known that the predictive validity of a model may be compromised when fewer experimental conditions are jointly accounted for (e...
July 11, 2017: Behavior Research Methods
https://www.readbyqxmd.com/read/28697554/egocentric-versus-allocentric-spatial-memory-in-behavioral-variant-frontotemporal-dementia-and-alzheimer-s-disease
#18
Sicong Tu, Hugo J Spiers, John R Hodges, Olivier Piguet, Michael Hornberger
BACKGROUND: Diagnosis of behavioral variant frontotemporal dementia (bvFTD) can be challenging, in particular when patients present with significant memory problems, which can increase the chance of a misdiagnosis of Alzheimer's disease (AD). Growing evidence suggests spatial orientation is a reliable cognitive marker able to differentiate these two clinical syndromes. OBJECTIVE: Assess the integrity of egocentric and allocentric heading orientation and memory in bvFTD and AD, and their clinical implications...
July 1, 2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28689261/investigation-of-cognitive-circuits-using-steady-state-cerebral-blood-volume-and-diffusion-tensor-imaging-in-patients-with-mild-cognitive-impairment-following-electrical-injury
#19
Chang-Hyun Park, Cheong Hoon Seo, Myung Hun Jung, So Young Joo, Soyeon Jang, Ho Young Lee, Suk Hoon Ohn
PURPOSE: We utilized cerebral blood volume (CBV) magnetic resonance imaging and diffusion tensor imaging (DTI) to investigate changes in cognitive networks in patients experiencing cognitive dysfunction following electrical injury. METHODS: Cognitive function was assessed across various domains, including attention, verbal memory, executive function, and language. Depressive symptoms were also evaluated. CBV maps and DTI measures were obtained from 24 patients (age, 41...
July 8, 2017: Neuroradiology
https://www.readbyqxmd.com/read/28687845/wayfinding-and-glaucoma-a-virtual-reality-experiment
#20
Fábio B Daga, Eduardo Macagno, Cory Stevenson, Ahmed Elhosseiny, Alberto Diniz-Filho, Erwin R Boer, Jürgen Schulze, Felipe A Medeiros
Purpose: Wayfinding, the process of determining and following a route between an origin and a destination, is an integral part of everyday tasks. The purpose of this study was to investigate the impact of glaucomatous visual field loss on wayfinding behavior using an immersive virtual reality (VR) environment. Methods: This cross-sectional study included 31 glaucomatous patients and 20 healthy subjects without evidence of overall cognitive impairment. Wayfinding experiments were modeled after the Morris water maze navigation task and conducted in an immersive VR environment...
July 1, 2017: Investigative Ophthalmology & Visual Science
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