278 Hits in 9.1 sec

Reliability comparison of spontaneous brain activities between BOLD and CBF contrasts in eyes-open and eyes-closed resting states

Qihong Zou, Xinyuan Miao, Dapeng Liu, Danny J.J. Wang, Yan Zhuo, Jia-Hong Gao
2015 NeuroImage  
Both short-and long-term reliabilities for CBF-mean and BOLD-ALFF were high, but were lower for CBF-ALFF, BOLD-and CBF-FC in both eyes-open and eyes-closed states.  ...  Blood oxygenation level dependent (BOLD) and arterial spin labeling (ASL) are two predominant resting-state fMRI techniques in mapping spontaneous brain activities.  ...  , 91132302, 90820307), and the Ministry of Science and Technology of China grant (2012CB825500).  ... 
doi:10.1016/j.neuroimage.2015.07.044 pmid:26226087 fatcat:ai47bstlgvcq7ifr3uw2544cni

Detecting Static and Dynamic Differences between Eyes-Closed and Eyes-Open Resting States Using ASL and BOLD fMRI

Qihong Zou, Bin-Ke Yuan, Hong Gu, Dongqiang Liu, Danny J. J. Wang, Jia-Hong Gao, Yihong Yang, Yu-Feng Zang, Nanyin Zhang
2015 PLoS ONE  
In conclusion, static brain activity measured by mean CBF and dynamic brain activity measured by BOLD-and CBF-ALFF may reflect different aspects of resting-state brain activity and a combination of ASL  ...  Here we acquired fMRI data while subjects were in eyes-closed (EC) and eyes-open (EO) states, using both ASL and BOLD techniques, at two research centers (NIDA and HNU).  ...  Yong Zhang from GE for his kind help with 3D ASL data acquisition at HNU and Kate Brynildsen at NIDA for linguistic editing. Author Contributions Conceived and designed the experiments: YFZ YY.  ... 
doi:10.1371/journal.pone.0121757 pmid:25816237 pmcid:PMC4376626 fatcat:47ljaihhirb3ji75tjllsn55pu

Effects of resting state condition on reliability, trait specificity, and network connectivity of brain function measured with arterial spin labeled perfusion MRI

Zhengjun Li, Marta Vidorreta, Natalie Katchmar, David C. Alsop, Daniel H. Wolf, John A. Detre
2018 NeuroImage  
Resting-state studies are typically carried out using just one of several prescribed state conditions such as eyes closed (EC), eyes open (EO), or visual fixation on a cross-hair (FIX), which may affect  ...  Our findings confirm ASL CBF as a reliable, stable, and consistent measure of resting-state regional brain function and support the use of EC or EO over FIX and PVT as the resting-state condition.  ...  DCA is an inventor of pseudocontinuous ASL and receives a share of postmarket royalties from his institution's licenses to GE Healthcare, Philips Healthcare, Siemens Healthineers, Hitachi Medical, and  ... 
doi:10.1016/j.neuroimage.2018.02.028 pmid:29454933 pmcid:PMC5957091 fatcat:3t2qtqjfurddrgdcotyvz2jvzy

Evaluation of Functional Connectivity in the Brain Using Positron Emission Tomography: A Mini-Review

Tadashi Watabe, Jun Hatazawa
2019 Frontiers in Neuroscience  
Resting-state networks (RSNs) exhibit spontaneous functional connectivity in the resting state.  ...  However, separation between regional increases in cerebral blood flow (CBF) and oxygen consumption is theoretically difficult using BOLD-fMRI.  ...  AUTHOR CONTRIBUTIONS Both authors wrote and approved the final version of the manuscript.  ... 
doi:10.3389/fnins.2019.00775 pmid:31402852 pmcid:PMC6676772 fatcat:vs7ore4xjfdivnm23x7etw755q

Finding thalamic BOLD correlates to posterior alpha EEG

Zhongming Liu, Jacco A. de Zwart, Bing Yao, Peter van Gelderen, Li-Wei Kuo, Jeff H. Duyn
2012 NeuroImage  
To address this, we evaluated the correlation between the blood oxygenation level dependent (BOLD) functional magnetic resonance imaging (fMRI) signals in the thalamus and the spontaneous modulation of  ...  In contrast, the dorsal nuclei were part of a distinct functional network that included brain stem, cingulate cortex and cerebellum.  ...  Figure 1 . 1 Single-subject spectral contrast between eyes-closed and eyes-open periods. a) Spectrogram for the Oz channel during the voluntary eyes-close-eyes-open task; b) Spectral difference between  ... 
doi:10.1016/j.neuroimage.2012.08.025 pmid:22986355 pmcid:PMC3472152 fatcat:37caiu6hb5ez3cweovio4giuge

Integration of Simultaneous Resting-State EEG, fMRI, and Eye Tracker Methods to Determine and Verify EEG Vigilance Measure [article]

Ahmad Mayeli, Obada Al Zoubi, Masaya Misaki, Jennifer L. Stewart, Vadim Zotev, Qingfei Luo, Raquel Phillips, Stefan Fischer, Marcus Goetz, Martin P. Paulus, Hazem Refai, Jerzy Bodurka
2019 arXiv   pre-print
measure) in healthy human subjects (n=10) during brain rest with eyes open.  ...  EEG is the modality extensively used for estimating vigilance during eyes-closed resting state.  ...  ., and Gao, J.-H. (2015a). Reliability comparison of spontaneous brain activities between BOLD and CBF contrasts in eyes-open and eyes-closed resting states. Neuroimage 121, 91-105. Zou, Q., Yuan, B.  ... 
arXiv:1912.04975v1 fatcat:gsrzkldtxjdhle4upimfavswdy

Functional connectivity in BOLD and CBF data: Similarity and reliability of resting brain networks

Kay Jann, Dylan G. Gee, Emily Kilroy, Simon Schwab, Robert X. Smith, Tyrone D. Cannon, Danny J.J. Wang
2015 NeuroImage  
This study systematically investigated the similarity and reliability of resting brain networks (RBNs) in BOLD and ASL.  ...  Moreover, we observed positive correlations between regional CBF and FC in core areas of all RBNs indicating a relationship between network connectivity and its baseline metabolism.  ...  This finding was consistent with earlier studies showing that RBNs can be reliably identified across time (Shehzad et al., 2009) and resting conditions (i.e., eyes open, closed or fixating on a cross)  ... 
doi:10.1016/j.neuroimage.2014.11.028 pmid:25463468 pmcid:PMC4285775 fatcat:6k3lqljdzjbz7g6ewib55cdtc4

Typical resting state activity of the brain requires visual input during an early sensitive period [article]

Katarzyna Rączy, Cordula Hölig, Maria J. S. Guerreiro, Sunitha Lingareddy, Ramesh Kekunnaya, Brigitte Röder
2021 bioRxiv   pre-print
Here, we used functional magnetic resonance imaging to acquire blood oxygen level dependent (BOLD) resting state activity during an eyes open and an eyes closed state in congenital cataract-reversal individuals  ...  The amplitude of low frequency fluctuations (ALFF) of the BOLD signal - a neural marker of spontaneous brain activity during rest - was analyzed.  ...  Balasubramanian of the L.V. Prasad Eye Institute for initiating and supporting our research.  ... 
doi:10.1101/2021.06.09.446724 fatcat:c2flbj7udjgsxmbrbd2itnsufy

Characterizing Resting-State Brain Function Using Arterial Spin Labeling

J. Jean Chen, Kay Jann, Danny J.J. Wang
2015 Brain Connectivity  
surrogate of the metabolic activity within corresponding networks; and (3) the study of resting-state dynamic CBF-BOLD coupling and cerebral metabolism: the use of dynamic CBF information obtained using  ...  ASL to assess dynamic CBF-BOLD coupling and oxidative metabolism in the resting state.  ...  418443, J.J.C.), National Institutes of Health funds, P50 HD055784, R01-MH080892, R01-NS081077, and R01-EB014922, and California Department of Public Health Fund, CDPH 13-12008 (D.J.J.W.).  ... 
doi:10.1089/brain.2015.0344 pmid:26106930 pmcid:PMC4652156 fatcat:bcp4otgrcnabfn3iqkf72mlriq

Relations between BOLD fMRI-Derived Resting Brain Activity and Cerebral Blood Flow

Zhengjun Li, Yisheng Zhu, Anna Rose Childress, John A. Detre, Ze Wang, Emmanuel Andreas Stamatakis
2012 PLoS ONE  
Both ReHo and ALFF were found to be reliably correlated with CBF in most of brain cortex. None of the assessed SBA measures was correlated with whole brain mean CBF.  ...  Citation: Li Z, Zhu Y, Childress AR, Detre JA, Wang Z (2012) Relations between BOLD fMRI-Derived Resting Brain Activity and Cerebral Blood Flow. PLoS ONE 7(9): e44556.  ...  Participants were asked to lie still in the scanner at rest, keep their eyes open, and think about nothing.  ... 
doi:10.1371/journal.pone.0044556 pmid:23028560 pmcid:PMC3448607 fatcat:thqowof2irfhrjlqb3vvmryyp4

Resting spontaneous activity in the default mode network predicts performance decline during prolonged attention workload

Danyang Gui, Sihua Xu, Senhua Zhu, Zhuo Fang, Andrea M. Spaeth, Yuanyuan Xin, Tingyong Feng, Hengyi Rao
2015 NeuroImage  
These results support the important role of both task-positive and task-negative networks in mediating TOT effects and suggest that spontaneous activity measured by resting-state BOLD fMRI may be a marker  ...  In this study, we induced TOT effects by administering a 20-minute continuous psychomotor vigilance test (PVT) to a group of 16 healthy adults and used resting-state blood oxygen level-dependent (BOLD)  ...  ), National Institutes of Health (NIH) Grants (R01 HL102119, R21 DA032022), and a pilot grant from the University of Pennsylvania Institute on Aging (IOA).  ... 
doi:10.1016/j.neuroimage.2015.07.030 pmid:26196666 pmcid:PMC4589485 fatcat:aovhw25ahjaurmecksrkzg72bq

Respiratory, cardiac, EEG, BOLD signals and functional connectivity over multiple microsleep episodes

Chun Siong Soon, Ksenia Vinogradova, Ju Lynn Ong, Vince D Calhoun, Thomas Liu, Zhou Juan Helen, Kwun Kei Ng, Michael W L Chee
2021 NeuroImage  
Additionally, resting state functional connectivity (RSFC) was altered in accord with the frequency of falling asleep and in a manner that global signal regression does not eliminate.  ...  The signal changes are intimately intertwined with shifts in respiration and heart rate, indicating that autonomic contributions are integral to the brain physiology evaluated using fMRI and cannot be  ...  The study was funded by the grants NMRC/STaR/0015/2013 and STaR19may-001 provided by the National Medical Research Council (Ministry of Health, Singapore).  ... 
doi:10.1016/j.neuroimage.2021.118129 pmid:33951513 fatcat:fdi6rgm4ljhwbc2yrqncnathyq

Functional MRI and Outcome in Traumatic Coma

Brian L. Edlow, Joseph T. Giacino, Ona Wu
2013 Current Neurology and Neuroscience Reports  
Advances in task-based functional MRI (fMRI), resting-state fMRI (rs-fMRI), and arterial-spin labeled (ASL) perfusion MRI have occurred at a rapid pace in recent years.  ...  These techniques for measuring brain function have great potential to improve the accuracy of prognostication for civilian and military patients with traumatic coma.  ...  Acknowledgments The contents of this manuscript were developed with support from the National Institutes of Health (R25NS065743), the Center for Integration of Medicine and Innovative Technology (Boston  ... 
doi:10.1007/s11910-013-0375-y pmid:23881623 pmcid:PMC3811121 fatcat:yubzmkpsqjcstefxxmabmn5jpa

Neuronal correlates of spontaneous fluctuations in fMRI signals in monkey visual cortex: Implications for functional connectivity at rest

Amir Shmuel, David A. Leopold
2008 Human Brain Mapping  
Despite the large body of human imaging literature on spontaneous activity and functional-connectivity in the resting state, the link to underlying neural activity remains tenuous.  ...  Recent studies have demonstrated large amplitude spontaneous fluctuations in functional-MRI (fMRI) signals in humans in the resting state.  ...  The experimental part of this work was supported by NKL through personnel and funds of the Max Planck Society.  ... 
doi:10.1002/hbm.20580 pmid:18465799 fatcat:jozu3ovsvrbv3cbq4d77tjyt2m

Neurovascular coupling in humans: Physiology, methodological advances and clinical implications

Aaron A Phillips, Franco HN Chan, Mei Mu Zi Zheng, Andrei V Krassioukov, Philip N Ainslie
2015 Journal of Cerebral Blood Flow and Metabolism  
Neurovascular coupling reflects the close temporal and regional linkage between neural activity and cerebral blood flow.  ...  To improve the reliability of measurement and related interpretation, the utility of new automated software for neurovascular coupling is demonstrated, which provides the capacity for coalescing repetitive  ...  The protocol itself should begin with the participants' eyes closed, and consist of 5À10 repeated cycles of 30 s eyes-closed, followed by eyes-open, followed by eyes-closed, with no time between.  ... 
doi:10.1177/0271678x15617954 pmid:26661243 pmcid:PMC4821024 fatcat:e74fdrfokzfipndlj7grx7cjhm
« Previous Showing results 1 — 15 out of 278 results