Topological analyses of functional connectomics: A crucial role of global signal removal, brain parcellation, and null models
Sign Up to like & getrecommendations! Published in 2018 at "Human Brain Mapping"
DOI: 10.1002/hbm.24305
Abstract: Recently, functional connectome studies based on resting‐state functional magnetic resonance imaging (R‐fMRI) and graph theory have greatly advanced our understanding of the topological principles of healthy and diseased brains. However, how different strategies for R‐fMRI… read more here.
Keywords: global signal; connectomics; parcellation; brain ... See more keywords
Altered task modulation of global signal topography in the default-mode network of unmedicated major depressive disorder.
Sign Up to like & getrecommendations! Published in 2021 at "Journal of affective disorders"
DOI: 10.1016/j.jad.2021.09.093
Abstract: BACKGROUND Altered global signal (GS) topography features in the resting-state fMRI of major depressive disorder (MDD), showing abnormally strong global signal representation in the default-mode network (DMN). Whether the abnormal local to global change also… read more here.
Keywords: topography; global signal; task; major depressive ... See more keywords
Identifying and removing widespread signal deflections from fMRI data: Rethinking the global signal regression problem
Sign Up to like & getrecommendations! Published in 2020 at "NeuroImage"
DOI: 10.1016/j.neuroimage.2020.116614
Abstract: One of the most controversial procedures in the analysis of resting-state functional magnetic resonance imaging (rsfMRI) data is global signal regression (GSR): the removal, via linear regression, of the mean signal averaged over the entire… read more here.
Keywords: global signal; gsr; regression; dicer ... See more keywords
Constraints on superconducting cosmic strings from the global 21-cm signal before reionization
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2019/09/009
Abstract: Electromagnetic radiation from the cusp region of superconducting cosmic strings leads to a radio excess in the photon spectrum in the early universe and can produce a deep absorption feature in the global 21cm signal… read more here.
Keywords: global signal; reionization; superconducting cosmic; cosmic strings ... See more keywords
The Not-So-Global Blood Oxygen Level-Dependent Signal
Sign Up to like & getrecommendations! Published in 2018 at "Brain connectivity"
DOI: 10.1089/brain.2017.0517
Abstract: Global signal regression is a controversial processing step for resting-state functional magnetic resonance imaging, partly because the source of the global blood oxygen level-dependent (BOLD) signal remains unclear. On the one hand, nuisance factors such… read more here.
Keywords: global signal; level dependent; signal; global blood ... See more keywords
The global 21-cm signal in the context of the high- z galaxy luminosity function
Sign Up to like & getrecommendations! Published in 2017 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/stw2412
Abstract: We build a new model for the global 21-cm signal that is calibrated to measurements of the high-z galaxy luminosity function (LF) and further tuned to match the Thomson scattering optical depth of the cosmic… read more here.
Keywords: global signal; galaxy luminosity; luminosity function; high galaxy ... See more keywords
Extracting the 21cm Global Signal using Artificial Neural Networks
Sign Up to like & getrecommendations! Published in 2019 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/stz3107
Abstract: The study of the cosmic Dark Ages, Cosmic Dawn, and Epoch of Reionization (EoR) using the all-sky averaged redshifted HI 21cm signal, are some of the key science goals of most of the ongoing or… read more here.
Keywords: global signal; neural networks; signal; 21cm global ... See more keywords
Joint constraints on reionization: A framework for combining the global 21 cm signal and the kinetic Sunyaev-Zel’dovich effect
Sign Up to like & getrecommendations! Published in 2022 at "Physical Review D"
DOI: 10.1103/physrevd.105.083503
Abstract: Recent measurements from the CMB and from high-redshift galaxy observations have placed rough constraints on the midpoint and duration of the Epoch of Reionization. Detailed measurements of the ionization history remain elusive, although two proposed… read more here.
Keywords: global signal; sunyaev zel; kinetic sunyaev; systematics ... See more keywords
Influence of the deviation of the matter power spectrum at small scales on the global 21-cm signal at cosmic dawn
Sign Up to like & getrecommendations! Published in 2023 at "Physical Review D"
DOI: 10.1103/physrevd.107.103501
Abstract: The matter power spectrum has been strongly constrained by astronomical measurements at large scales, but only weakly at small scales. Compared with the standard scenario, the deviation of the matter power spectrum at small scales… read more here.
Keywords: matter; matter power; power spectrum; small scales ... See more keywords
Altered Global Signal Topography in Alcohol Use Disorders
Sign Up to like & getrecommendations! Published in 2022 at "Frontiers in Aging Neuroscience"
DOI: 10.3389/fnagi.2022.803780
Abstract: The most common symptom of patients with alcohol use disorders (AUD) is cognitive impairment that negatively affects abstinence. Presently, there is a lack of indicators for early diagnosis of alcohol-related cognitive impairment (ARCI). We aimed… read more here.
Keywords: signal topography; use disorders; global signal; alcohol use ... See more keywords