Results 71 to 80 of about 72,622 (298)

Multiscale network activity in resting state fMRI [PDF]

2016 38th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), 2016
The brain is inherently multiscalar in both space and time. We argue that this multiscalar nature is reflected in the blood oxygenation level dependent (BOLD) fluctuations used to map functional connectivity. We present evidence that global fluctuations in activity, quasiperiodic spatiotemporal patterns, and aperiodic time-varying activity coexist ...
Shella D. Keilholz, Jacob C. Billings, Kai Wang, Anzar Abbas, Claudia Hafeneger, Wen-Ju Pan, Sadia Shakil, Maysam Nezafati   +7 more
openaire   +2 more sources

An implementation of integrated information theory in resting-state fMRI

Communications Biology, 2023
AbstractIntegrated Information Theory was developed to explain and quantify consciousness, arguing that conscious systems consist of elements that are integrated through their causal properties. This study presents an implementation of Integrated Information Theory 3.0, the latest version of this framework, to functional MRI data.
Idan Efim Nemirovsky, Nicholas J. M. Popiel, Jorge Rudas, Matthew Caius, Lorina Naçi, Nicholas D. Schiff, Adrian M. Owen, Andrea Soddu   +7 more
openaire   +4 more sources

Inhibitory Decay and Supercritical Brain Dynamics During Sleep Deprivation

Advanced Science, EarlyView.
Sleep deprivation progressively shifts human brain dynamics from near‐critical toward supercritical states, as revealed by neuronal avalanche analysis of resting‐state fMRI. These changes track subjective sleep pressure rather than vigilance lapses and show marked network heterogeneity. A circuit model suggests that reduced inhibitory efficacy provides
Dai Zhang, Liqin Zhou, Rong Wang, Yuehua Han, Zhentao Zuo, Yanghua Tian, Ke Zhou   +6 more
wiley   +1 more source

Olfactory Bulb Volume Reflects Olfactory Dysfunction and Network Organization: Insights From the Population‐Based Rhineland Study

International Forum of Allergy &Rhinology, EarlyView.
ABSTRACT Background Olfactory dysfunction is common in aging and an early symptom of neurodegenerative diseases, but how structural (olfactory bulb [OB] volume) and functional (olfactory network [OFN] functional connectivity [FC]) brain features interact to shape odor identification ability remains unclear.
Weiyi Zeng, Konstantinos Melas, Santiago Estrada, N. Ahmad Aziz, Monique M. B. Breteler   +4 more
wiley   +1 more source

A study of neural activity and functional connectivity within the olfactory brain network in Parkinson's disease

NeuroImage: Clinical, 2019
Olfactory dysfunction is an early manifestation of Parkinson's disease (PD). The present study aimed to illustrate potential differences between PD patients and healthy controls in terms of neural activity and functional connectivity within the olfactory
Charalampos Georgiopoulos, Suzanne T. Witt, Sven Haller, Nil Dizdar, Helene Zachrisson, Maria Engström, Elna-Marie Larsson   +6 more
doaj   +1 more source

Loss of resting-state posterior cingulate flexibility is associated with memory disturbance in left temporal lobe epilepsy. [PDF]

PLoS ONE, 2015
The association between cognition and resting-state fMRI (rs-fMRI) has been the focus of many recent studies, most of which use stationary connectivity.
Linda Douw, Catherine L Leveroni, Naoaki Tanaka, Britt C Emerton, Andrew J Cole, Claus Reinsberger, Steven M Stufflebeam   +6 more
doaj   +1 more source

Resting-State Functional Connectivity in Mathematical Expertise

Brain Sciences, 2021
To what extent are different levels of expertise reflected in the functional connectivity of the brain? We addressed this question by using resting-state functional magnetic resonance imaging (fMRI) in mathematicians versus non-mathematicians.
Miseon Shim, Han-Jeong Hwang, Ulrike Kuhl, Hyeon-Ae Jeon   +3 more
doaj   +1 more source

Atypical Predictive Processing Is Associated With Sensory Over‐Responsivity in Autism

Autism Research, EarlyView.
ABSTRACT Autism is characterized by sensory processing atypicalities including sensory over‐responsivity (SOR), a heightened negative response to sensory stimuli. Although the neural mechanisms underlying SOR are not fully understood, SOR has been associated with sensory‐limbic hyper‐reactivity during sensory stimulation.
Bar Yosef, Valerie Burgess, Megan Banchik, Joshua Ceballos, Mirella Dapretto, Shulamite Green   +5 more
wiley   +1 more source

Optimization of scan time for resting ⁃state fMRI in clinical application

Chinese Journal of Contemporary Neurology and Neurosurgery, 2011
Objective To study the optimization of scan time for resting⁃state functional magnetic resonance imaging (fMRI) in clinical application. Methods Fractional amplitude of low ⁃ frequency fluctuation (fALFF) was performed to analyse the resting ⁃ state fMRI
Cheng ZHAO, Jie LU, Kuncheng LI, Xiaoyi WANG, Hui WANG, Miao ZHANG   +5 more
doaj  

Caffeine-Induced Global Reductions in Resting-state BOLD Connectivity reflect Widespread Decreases in MEG Connectivity

Frontiers in Human Neuroscience, 2013
In resting-state functional magnetic resonance imaging (fMRI), the temporal correlation between spontaneous fluctuations of the blood oxygenation level dependent (BOLD) signal from different brain regions is used to assess functional connectivity ...
Omer eTal, Omer eTal, Mithun eDiwakar, Mithun eDiwakar, Chi-Wah eWong, Chi-Wah eWong, Valur eOlafsson, Valur eOlafsson, Roland eLee, Ming-Xiong eHuang, Ming-Xiong eHuang, Thomas eLiu, Thomas eLiu, Thomas eLiu   +13 more
doaj   +1 more source