keyword
MENU ▼
Read by QxMD icon Read
search

Cognitive mapping

keyword
https://www.readbyqxmd.com/read/27934763/selective-modulation-of-cortical-state-during-spatial-attention
#1
Tatiana A Engel, Nicholas A Steinmetz, Marc A Gieselmann, Alexander Thiele, Tirin Moore, Kwabena Boahen
Neocortical activity is permeated with endogenously generated fluctuations, but how these dynamics affect goal-directed behavior remains a mystery. We found that ensemble neural activity in primate visual cortex spontaneously fluctuated between phases of vigorous (On) and faint (Off) spiking synchronously across cortical layers. These On-Off dynamics, reflecting global changes in cortical state, were also modulated at a local scale during selective attention. Moreover, the momentary phase of local ensemble activity predicted behavioral performance...
December 2, 2016: Science
https://www.readbyqxmd.com/read/27930915/anatomical-dysconnectivity-in-bipolar-disorder-compared-with-schizophrenia-a-selective-review-of-structural-network-analyses-using-diffusion-mri
#2
REVIEW
Stefani O'Donoghue, Laurena Holleran, Dara M Cannon, Colm McDonald
BACKGROUND: The dysconnectivity hypothesis suggests that psychotic illnesses arise not from regionally specific focal pathophysiology, but rather from impaired neuroanatomical integration across networks of brain regions. Decreased white matter organization has been hypothesized to be a feature of psychotic illnesses in general, which is supported by meta-analyses of DTI studies in bipolar disorder and schizophrenia. Although many diffusion MRI studies investigate bipolar disorder and schizophrenia alone, relatively few studies directly compare structural features in these psychotic illnesses...
November 17, 2016: Journal of Affective Disorders
https://www.readbyqxmd.com/read/27928763/rationality-perception-and-the-all-seeing-eye
#3
Teppo Felin, Jan Koenderink, Joachim I Krueger
Seeing-perception and vision-is implicitly the fundamental building block of the literature on rationality and cognition. Herbert Simon and Daniel Kahneman's arguments against the omniscience of economic agents-and the concept of bounded rationality-depend critically on a particular view of the nature of perception and vision. We propose that this framework of rationality merely replaces economic omniscience with perceptual omniscience. We show how the cognitive and social sciences feature a pervasive but problematic meta-assumption that is characterized by an "all-seeing eye...
December 7, 2016: Psychonomic Bulletin & Review
https://www.readbyqxmd.com/read/27927958/coding-of-event-nodes-and-narrative-context-in-the-hippocampus
#4
Branka Milivojevic, Meryl Varadinov, Alejandro Vicente Grabovetsky, Silvy H P Collin, Christian F Doeller
: Narratives may provide a general context, unrestricted by space and time, which can be used to organize episodic memories into networks of related events. However, it is not clear how narrative contexts are represented in the brain. Here we test the novel hypothesis that the formation of narrative-based contextual representations in humans relies on the same hippocampal mechanisms that enable formation of spatiotemporal contexts in rodents. Participants watched a movie consisting of two interleaved narratives while we monitored their brain activity using fMRI...
December 7, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/27926741/association-of-sensory-processing-with-higher-order-cognition-and-functioning-in-schizophrenia-mapping-the-world
#5
Sophia Vinogradov, Srikantan Nagarajan
No abstract text is available yet for this article.
December 7, 2016: JAMA Psychiatry
https://www.readbyqxmd.com/read/27924300/a-dataset-of-multiresolution-functional-brain-parcellations-in-an-elderly-population-with-no-or-mild-cognitive-impairment
#6
Angela Tam, Christian Dansereau, AmanPreet Badhwar, Pierre Orban, Sylvie Belleville, Howard Chertkow, Alain Dagher, Alexandru Hanganu, Oury Monchi, Pedro Rosa-Neto, Amir Shmuel, John Breitner, Pierre Bellec
We present group eight resolutions of brain parcellations for clusters generated from resting-state functional magnetic resonance images for 99 cognitively normal elderly persons and 129 patients with mild cognitive impairment, pooled from four independent datasets. This dataset was generated as part of the following study: Common Effects of Amnestic Mild Cognitive Impairment on Resting-State Connectivity Across Four Independent Studies (Tam et al., 2015) [1]. The brain parcellations have been registered to both symmetric and asymmetric MNI brain templates and generated using a method called bootstrap analysis of stable clusters (BASC) (Bellec et al...
December 2016: Data in Brief
https://www.readbyqxmd.com/read/27920794/dance-experience-and-associations-with-cortical-gray-matter-thickness-in-the-aging-population
#7
Shai Porat, Naira Goukasian, Kristy S Hwang, Theodore Zanto, Triet Do, Jonathan Pierce, Shantanu Joshi, Ellen Woo, Liana G Apostolova
INTRODUCTION: We investigated the effect dance experience may have on cortical gray matter thickness and cognitive performance in elderly participants with and without mild cognitive impairment (MCI). METHODS: 39 cognitively normal and 48 MCI elderly participants completed a questionnaire regarding their lifetime experience with music, dance, and song. Participants identified themselves as either dancers or nondancers. All participants received structural 1.5-tesla MRI scans and detailed clinical and neuropsychological evaluations...
September 2016: Dementia and Geriatric Cognitive Disorders Extra
https://www.readbyqxmd.com/read/27920731/do-you-read-how-i-read-systematic-individual-differences-in-semantic-reliance-amongst-normal-readers
#8
Anna M Woollams, Matthew A Lambon Ralph, Gaston Madrid, Karalyn E Patterson
The extent to which meaning is involved in reading aloud has proven an area of longstanding debate, and current computational models differ on this dimension. The connectionist triangle model proposes that normal individuals rely on semantic information for correct reading of words with atypical spelling-sound relationships, but to varying degrees. This proposed individual difference would account for the varying stage of decline at which patients with semantic dementia first show the reading impairment known as surface dyslexia...
2016: Frontiers in Psychology
https://www.readbyqxmd.com/read/27920431/cerebral-blood-flow-blood-supply-and-cognition-in-type-2-diabetes-mellitus
#9
Jacobus F A Jansen, Frank C G van Bussel, Harm J van de Haar, Matthias J P van Osch, Paul A M Hofman, Martin P J van Boxtel, Robert J van Oostenbrugge, Miranda T Schram, Coen D A Stehouwer, Joachim E Wildberger, Walter H Backes
We investigated whether type 2 diabetes (T2DM) and the presence of cognitive impairment are associated with altered cerebral blood flow (CBF). Forty-one participants with and thirty-nine without T2DM underwent 3-Tesla MRI, including a quantitative technique measuring (macrovascular) blood flow in the internal carotid artery and an arterial spin labeling technique measuring (microvascular) perfusion in the grey matter (GM). Three analysis methods were used to quantify the CBF: a region of interest analysis, a voxel-based statistical parametric mapping technique, and a 'distributed deviating voxels' method...
December 2016: Scientific Reports
https://www.readbyqxmd.com/read/27919750/mapping-the-functional-connectome-in-traumatic-brain-injury-what-can-graph-metrics-tell-us
#10
Karen Caeyenberghs, Helena Verhelst, Adam Clemente, Peter H Wilson
OBJECTIVE: Traumatic brain injury (TBI) is associated with cognitive and motor deficits, and poses a significant personal, societal, and economic burden. One mechanism by which TBI is thought to affect cognition and behaviour is through changes in functional connectivity. Graph theory is a powerful framework for quantifying topological features of neuroimaging-derived functional networks. The objective of this paper is to review studies examining functional connectivity in TBI with an emphasis on graph theoretical analysis that is proving to be valuable in uncovering network abnormalities in this condition...
December 2, 2016: NeuroImage
https://www.readbyqxmd.com/read/27919546/brain-morphometry-predicts-individual-creative-potential-and-the-ability-to-combine-remote-ideas
#11
David Bendetowicz, Marika Urbanski, Clarisse Aichelburg, Richard Levy, Emmanuelle Volle
For complex mental functions such as creative thinking, inter-individual variability is useful to better understand the underlying cognitive components and brain anatomy. Associative theories propose that creative individuals have flexible semantic associations, which allows remote elements to be formed into new combinations. However, the structural brain variability associated with the ability to combine remote associates has not been explored. To address this question, we performed a voxel-based morphometry (VBM) study and explored the anatomical connectivity of significant regions...
November 15, 2016: Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
https://www.readbyqxmd.com/read/27917569/distinct-intrinsic-functional-brain-network-abnormalities-in-methamphetamine-dependent-patients-with-and-without-a-history-of-psychosis
#12
Jonathan C Ipser, Anne Uhlmann, Paul Taylor, Brian H Harvey, Don Wilson, Dan J Stein
Chronic methamphetamine use is associated with executive functioning deficits that suggest dysfunctional cognitive control networks (CCNs) in the brain. Likewise, abnormal connectivity between intrinsic CCNs and default mode networks (DMNs) has also been associated with poor cognitive function in clinical populations. Accordingly, we tested the extent to which methamphetamine use predicts abnormal connectivity between these networks, and whether, as predicted, these abnormalities are compounded in patients with a history of methamphetamine-associated psychosis (MAP)...
December 5, 2016: Addiction Biology
https://www.readbyqxmd.com/read/27916830/influence-of-fragrances-on-human-psychophysiological-activity-with-special-reference-to-human-electroencephalographic-response
#13
REVIEW
Kandhasamy Sowndhararajan, Songmun Kim
The influence of fragrances such as perfumes and room fresheners on the psychophysiological activities of humans has been known for a long time, and its significance is gradually increasing in the medicinal and cosmetic industries. A fragrance consists of volatile chemicals with a molecular weight of less than 300 Da that humans perceive through the olfactory system. In humans, about 300 active olfactory receptor genes are devoted to detecting thousands of different fragrance molecules through a large family of olfactory receptors of a diverse protein sequence...
November 29, 2016: Scientia Pharmaceutica
https://www.readbyqxmd.com/read/27908795/orthostatic-cardiovascular-profile-of-subjective-well-being
#14
Dmitry M Davydov, Róża Czabak-Garbacz
Previous clinical and elderly population studies have found that affective well-being can be assessed by clino-orthostatic cardiovascular reactivity. This study explored this relationship in a young healthy sample, and with respect to cognitive appraisals of well-being. Four successive readings of blood pressure (BP) and heart rate (HR) after lying down (clinostatic probe) followed by four successive readings after standing up (orthostatic probe) were obtained from 52 healthy students along with questionnaire-reported well-being...
November 28, 2016: Biological Psychology
https://www.readbyqxmd.com/read/27905520/a-parallel-adaboost-backpropagation-neural-network-for-massive-image-dataset-classification
#15
Jianfang Cao, Lichao Chen, Min Wang, Hao Shi, Yun Tian
Image classification uses computers to simulate human understanding and cognition of images by automatically categorizing images. This study proposes a faster image classification approach that parallelizes the traditional Adaboost-Backpropagation (BP) neural network using the MapReduce parallel programming model. First, we construct a strong classifier by assembling the outputs of 15 BP neural networks (which are individually regarded as weak classifiers) based on the Adaboost algorithm. Second, we design Map and Reduce tasks for both the parallel Adaboost-BP neural network and the feature extraction algorithm...
December 1, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27899138/the-impact-of-oxytocin-administration-on-brain-activity-a-systematic-review-and-meta-analysis-protocol
#16
Daniel S Quintana, Tim Outhred, Lars T Westlye, Gin S Malhi, Ole A Andreassen
BACKGROUND: Converging evidence demonstrates the important role of the neuropeptide hormone oxytocin (OT) in human behaviour and cognition. Intranasal OT administration has been shown to improve several aspects of social communication, such as the theory of mind performance and gaze to the eye region, and reduce anxiety and related negative cognitive appraisals. While this early research has demonstrated the potential for intranasal OT to treat psychiatric illnesses characterized by social impairments, the neurobiological mechanisms are not well known...
November 29, 2016: Systematic Reviews
https://www.readbyqxmd.com/read/27886008/the-alteration-of-zibupiyin-recipe-on-proteomic-profiling-of-forebrain-postsynaptic-density-of-db-db-mice-with-diabetes-associated-cognitive-decline
#17
Jing Chen, Libin Zhan, Xiaoguang Lu, Chi Xiao, Nijing Sun
Diabetes-associated cognitive decline (DACD) is a brain injury induced by diabetes mellitus, with cognitive impairment as the major symptom. Growing evidence has revealed that DACD is correlated with disruptions in synapses involved in cognition. Within synapses, more specifically in areas of postsynaptic density (PSD), there is a high concentration of proteins that receive and transduce synaptic information. In the present study, to identify the differentially expressed PSD proteins among DACD mice, ZiBuPiYin recipe (ZBPYR)-treated DACD mice and control mice, we applied isobaric tags for relative and absolute quantitation (iTRAQ) with LC-MS/MS technology, by which three biological replicates and three technical replicates were examined...
November 19, 2016: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/27883250/3d-tract-specific-local-and-global-analysis-of-white-matter-integrity-in-alzheimer-s-disease
#18
Yan Jin, Chao Huang, Madelaine Daianu, Liang Zhan, Emily L Dennis, Robert I Reid, Clifford R Jack, Hongtu Zhu, Paul M Thompson
Alzheimer's disease (AD) is a chronic neurodegenerative disease characterized by progressive decline in memory and other aspects of cognitive function. Diffusion-weighted imaging (DWI) offers a non-invasive approach to delineate the effects of AD on white matter (WM) integrity. Previous studies calculated either some summary statistics over regions of interest (ROI analysis) or some statistics along mean skeleton lines (Tract Based Spatial Statistic [TBSS]), so they cannot quantify subtle local WM alterations along major tracts...
November 24, 2016: Human Brain Mapping
https://www.readbyqxmd.com/read/27881776/time-is-not-space-core-computations-and-domain-specific-networks-for-mental-travels
#19
Baptiste Gauthier, Virginie van Wassenhove
: Humans can consciously project themselves in the future and imagine themselves at different places. Do mental time travel and mental space navigation abilities share common cognitive and neural mechanisms? To test this, we recorded fMRI while participants mentally projected themselves in time or in space (e.g., 9 years ago, in Paris) and ordered historical events from their mental perspective. Behavioral patterns were comparable for mental time and space and shaped by self-projection and by the distance of historical events to the mental position of the self, suggesting the existence of egocentric mapping in both dimensions...
November 23, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/27878764/the-involvement-of-supratentorial-white-matter-in-multiple-system-atrophy-a-diffusion-tensor-imaging-tractography-study
#20
Po-Shan Wang, Chien-Li Yeh, Chia-Feng Lu, Hsiu-Mei Wu, Bing-Wen Soong, Yu-Te Wu
It has been assumed that cognitive disorder and visual-spatial disturbance in multiple system atrophy of the predominantly cerebellar type (MSA-C) are attributable to degradation of cerebellar function. The purpose of this study was to use diffusion tensor imaging (DTI) tractography to determine if patients with MSA-C characterized in part by visual-spatial disorders and cognitive disorders have changes of the structural connectivity network of nerve fibers, and to further describe the structural connectivity network...
November 23, 2016: Acta Neurologica Belgica
keyword
keyword
6119
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"