Results 91 to 100 of about 111,880 (318)

Estimating Time-Varying Effective Connectivity in High-Dimensional fMRI Data Using Regime-Switching Factor Models

, 2017
Recent studies on analyzing dynamic brain connectivity rely on sliding-window analysis or time-varying coefficient models which are unable to capture both smooth and abrupt changes simultaneously. Emerging evidence suggests state-related changes in brain
Ombao, Hernando, Salleh, Sh-Hussain, Samdin, S. Balqis, Ting, Chee-Ming   +3 more
core   +1 more source

Detecting language network alterations in mild cognitive impairment using task‐based fMRI and resting‐state fMRI: A comparative study

Brain and Behavior
Objective The objective of this study was to investigate the functional changes associated with mild cognitive impairment (MCI) using independent component analysis (ICA) with the word generation task functional magnetic resonance imaging (fMRI) and ...
Kerem Kemik, Emel Ada, Berrin Çavuşoğlu, Cansu Aykaç, Derya Durusu Emek Savaş, Görsev Yener   +5 more
doaj   +1 more source

Statistical Learning for Resting-State fMRI: Successes and Challenges [PDF]

, 2011
International audienceIn the absence of external stimuli, fluctuations in cerebral activity can be used to reveal intrinsic structures. Well-conditioned probabilistic models of this so-called resting-state activity are needed to support neuroscientific ...
B. Biswal, B. Biswal, C.F. Beckmann, E. Bullmore, G. Varoquaux, G. Varoquaux, I. Daubechies, J.S. Damoiseaux, S. Bialonski, S. Smith, V.D. Calhoun, Y. He   +11 more
core   +3 more sources

Moderate to Vigorous Physical Activity as a Cause of Dietary Restriction in Eating Disorders

International Journal of Eating Disorders, EarlyView.
ABSTRACT Objective The mechanisms that facilitate prolonged dietary restriction in eating disorders, particularly in the absence of binge eating, remain poorly understood. The activity‐based anorexia model and basic science in exercise physiology suggest that moderate to vigorous physical activity leads to reduced energy intake relative to metabolic ...
K. Jean Forney, Angela R. Hillman, Lindsay P. Bodell   +2 more
wiley   +1 more source

The effects of hemodynamic lag on functional connectivity and behavior after stroke [PDF]

, 2015
Stroke disrupts the brain's vascular supply, not only within but also outside areas of infarction. We investigated temporal delays (lag) in resting state functional magnetic resonance imaging signals in 130 stroke patients scanned two weeks, three months
Corbetta, Maurizio, Ramsey, Lenny, Shulman, Gordon L, Siegel, Joshua S, Snyder, Abraham Z   +4 more
core   +1 more source

Multi-timescale hybrid components of the functional brain connectome: A bimodal EEG-fMRI decomposition

Network Neuroscience, 2020
Concurrent electroencephalography (EEG) and functional magnetic resonance imaging (fMRI) bridge brain connectivity across timescales. During concurrent EEG-fMRI resting-state recordings, whole-brain functional connectivity (FC) strength is spatially ...
Jonathan Wirsich, Enrico Amico, Anne-Lise Giraud, Joaquín Goñi, Sepideh Sadaghiani   +4 more
doaj   +1 more source

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 ...
Maysam Nezafati, Wen-Ju Pan, Shella D. Keilholz, Jacob Billings, Kai Wang, Sadia Shakil, Claudia Hafeneger, Anzar Abbas   +7 more
openaire   +2 more sources

Group analysis data representing the effects of frontopolar transcranial direct current stimulation on the default mode network

Data in Brief, 2018
The current data provide information about altered activities of the default mode network (DMN) after applying transcranial direct current stimulation (tDCS) over the frontopolar prefrontal cortex. To explore whether frontopolar tDCS with a small current
Jeesung Ahn, Jonghyun Lee, Jin Hyuk Han, Min Seong Kang, Sanghoon Han   +4 more
doaj  

Resting‐state functional connectivity changes with microburst vagus nerve stimulation therapy

Epilepsia Open, EarlyView.
Abstract Objective Microburst vagus nerve stimulation (μVNS) may reduce seizure frequency in drug‐resistant epilepsy (DRE) via targeted thalamic plasticity. We prospectively investigated the role of thalamic resting‐state functional connectivity (rsFC) in μVNS effects and hypothesized a relationship between thalamic rsFC and long‐term seizure frequency
Jane B. Allendorfer, Rodolphe Nenert, Elhum Shamshiri, Giovanni Ranuzzi, Jason Begnaud, Ryan Verner, Jerzy P. Szaflarski, for the Microburst Study Group, Rebecca O’Dwyer, Michael Macken, Blake Newman, Cornelia Drees, Danielle McDermott, Lesley Kaye, Mesha Gay Brown, Muhammad Zafar, William Tatum, Selim Benbadis, Pegah Afra, Zeenat Jaisani, Kristl Vonck   +20 more
wiley   +1 more source

Dynamic mode decomposition of resting-state and task fMRI [PDF]

NeuroImage, 2018
AbstractComponent analysis is a powerful tool to identify dominant patterns of interactions in multivariate datasets. In the context of fMRI data, methods such as principal component analysis or independent component analysis have been used to identify the brain networks shaping functional connectivity (FC).
Wang Chi, Raphaël Liégeois, Raphaël Liégeois, Raphaël Liégeois, B.T. Thomas Yeo, Xiaolu Kong, Jeremy Casorso, Dimitri Van De Ville   +7 more
openaire   +4 more sources