Results 161 to 170 of about 1,007,015 (362)

Learning and Controlling Silicon Dopant Transitions in Graphene Using Scanning Transmission Electron Microscopy

open access: yesAdvanced Materials Interfaces, EarlyView.
Atomic transition rates for manipulating single silicon atoms in graphene with an electron beam in the scanning transmission electron microscope are experimentally extracted. Automated experiments and deep learning methods provide a means to probe and collect vast amounts of data to determine transition probabilities as a function of beam coordinate. A
Max Schwarzer   +10 more
wiley   +1 more source

Default Mode Network Oscillatory Coupling Is Increased Following Concussion

open access: yesFrontiers in Neurology, 2018
Concussion is a common form of mild traumatic brain injury. Despite the descriptor “mild,” a single injury can leave long-lasting and sustained alterations to brain function, including changes to localized activity and large-scale interregional ...
Benjamin T. Dunkley   +11 more
doaj   +1 more source

Affective modulation of cognitive control is determined by performance-contingency and mediated by ventromedial prefrontal and cingulate cortex [PDF]

open access: yes, 2013
Cognitive control requires a fine balance between stability, the protection of an on-going task-set, and flexibility, the ability to update a task-set in line with changing contingencies.
Braem, Senne   +5 more
core   +1 more source

The Default Mode Network’s Role in Discrete Emotion

open access: yesTrends in Cognitive Sciences, 2019
Emotions are often assumed to manifest in subcortical limbic and brainstem structures. While these areas are clearly important for representing affect (e.g., valence and arousal), we propose that the default mode network (DMN) is additionally important for constructing discrete emotional experiences (of anger, fear, disgust, etc.).
Kristen A. Lindquist, Ajay B. Satpute
openaire   +4 more sources

Efficient and Realistic Brain Simulation: A Review and Design Guide for Memristor‐Based Approaches

open access: yesAdvanced Materials Technologies, EarlyView.
Memristor‐based emulation of Hodgkin‐Huxley neuron models is investigated, by defining the ideal device characteristics needed for accurate ion‐channel representation and reviewing existing works targeting memristive replication of biological realistic neural behavior.
Lennart Paul Liong Landsmeer   +5 more
wiley   +1 more source

Brain network functional connectivity changes in long illness duration chronic schizophrenia

open access: yesFrontiers in Psychiatry
IntroductionChronic schizophrenia has a course of 5 years or more and has a widespread abnormalities in brain functional connectivity. This study aimed to find characteristic functional and structural changes in a long illness duration chronic ...
Yin Xia Bai   +20 more
doaj   +1 more source

Detecting neural activity and connectivity by perfusion-based fMRI [PDF]

open access: yesarXiv, 2017
This study proposes an approach to estimate the functional localization and connectivity from CBF and BOLD signals simultaneously measured by ASL (arterial spin labeling) MRI, especially using exploratory Structural Equation Modeling analysis. In a visual task experiment, the primary visual cortices were located by analyzing the perfusion data.
arxiv  

Dynamic Default Contagion in Heterogeneous Interbank Systems [PDF]

open access: yesarXiv, 2020
In this work we provide a simple setting that connects the structural modelling approach of Gai-Kapadia interbank networks with the mean-field approach to default contagion. To accomplish this we make two key contributions. First, we propose a dynamic default contagion model with endogenous early defaults for a finite set of banks, generalising the Gai-
arxiv  

The default mode network: where the idiosyncratic self meets the shared social world

open access: yesNature Reviews Neuroscience, 2021
Y. Yeshurun, Mai Nguyen, U. Hasson
semanticscholar   +1 more source

Disorder-specific functional abnormalities during sustained attention in youth with Attention Deficit Hyperactivity Disorder (ADHD) and with Autism [PDF]

open access: yes, 2012
Attention Deficit Hyperactivity Disorder (ADHD) and Autism Spectrum Disorder (ASD) are often comorbid and share behavioural-cognitive abnormalities in sustained attention.
A B Smith   +77 more
core   +1 more source

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