Article
Cell Biology
Yvette Bohraus, Hellmut Merkle, Nikos K. Logothetis, Jozien Goense
Summary: Blood-oxygenation-level-dependent functional magnetic resonance imaging (BOLD fMRI) is biased towards large veins on the cortical surface, while cerebral metabolic rate of oxygen (ACMRO2) may better reflect neural cortical function. This study examines the validity of the calibrated BOLD model for measuring functional CMRO2 at high resolution and demonstrates the feasibility of laminar ACMRO2 measurement, providing a meaningful metric of laminar functional metabolism.
Article
Endocrinology & Metabolism
Christin Y. Sander, Stefano Bovo, Angel Torrado-Carvajal, Daniel Albrecht, Hongping Deng, Vitaly Napadow, Julie C. Price, Jacob M. Hooker, Marco L. Loggia
Summary: The study demonstrates that increases in [C-11]PBR28 signal in chronic low back pain patients are not accompanied by increases in cerebral blood flow (CBF) compared to healthy controls. Similarly, areas of marginal hypoperfusion do not show decreases in [C-11]PBR28 signal. Additionally, hypercapnia-induced increases in CBF in non-human primates during radiotracer delivery or washout do not alter [C-11]PBR28 outcome measures.
JOURNAL OF CEREBRAL BLOOD FLOW AND METABOLISM
(2021)
Article
Neurosciences
Aocai Yang, Hangwei Zhuang, Lei Du, Bing Liu, Kuan Lv, Jixin Luan, Pianpian Hu, Feng Chen, Kai Wu, Ni Shu, Amir Shmuel, Guolin Ma, Yi Wang
Summary: This study evaluated the whole-brain pattern of oxygen extraction fraction (OEF), cerebral blood flow (CBF), and cerebral metabolic rate of oxygen consumption (CMRO2) perturbation in Alzheimer's disease (AD) and investigated the relationship between regional cerebral oxygen metabolism and global cognition. The results showed that CBF and CMRO2 values significantly decreased in certain brain regions in AD patients. Moreover, there was a positive correlation between CBF and CMRO2 values in the hippocampus and cognitive status. The findings suggest that CMRO2 may serve as a potential biomarker for AD and CMRO2 in the hippocampus may be useful for monitoring cognitive impairment.
Article
Endocrinology & Metabolism
Nisha Singh, Eilidh MacNicol, Ottavia DiPasquale, Karen Randall, David Lythgoe, Ndabezinhle Mazibuko, Camilla Simmons, Pierluigi Selvaggi, Stephanie Stephenson, Federico E. Turkheimer, Diana Cash, Fernando Zelaya, Alessandro Colasanti
Summary: Methylene Blue is a drug that can penetrate the brain and has potential neuroprotective, antioxidant, and metabolic enhancing effects. In vitro studies suggest that it enhances mitochondrial activity in brain cells. However, there is no research directly assessing its metabolic effects in the human brain.
JOURNAL OF CEREBRAL BLOOD FLOW AND METABOLISM
(2023)
Article
Endocrinology & Metabolism
Ronney B. Panerai, Aaron Davies, Rebecca H. Clough, Lucy C. Beishon, Thompson G. Robinson, Jatinder S. Minhas
Summary: The cerebral circulation responds differently to changes in mean arterial pressure (MAP) caused by hypercapnia. This study found that hypercapnia significantly reduces the autoregulation index of cerebral blood flow, but does not affect the directional sensitivity.
JOURNAL OF CEREBRAL BLOOD FLOW AND METABOLISM
(2023)
Article
Clinical Neurology
R. Sky Jones, Manus J. Donahue, L. Taylor Davis, Sumit Pruthi, Spencer L. Waddle, Chelsea Custer, Niral J. Patel, Michael R. DeBaun, Adetola A. Kassim, Mark Rodeghier, Lori C. Jordan
Summary: This study evaluated the reduction of gray matter volume (GMV) and white matter volume (WMV) in children and young adults with sickle cell disease (SCD) using high-resolution MRI. The results showed an association between anemia, low arterial oxygen content, and decreased GMV and WMV. Increased gray matter cerebral blood flow and infarct burden were also associated with reduced volume in subcortical structures. This highlights the potential of brain volume as a biomarker of brain injury in SCD.
FRONTIERS IN NEUROLOGY
(2023)
Article
Clinical Neurology
Souvik Sen, Hongyu An, Myriam Sollman, Jonathan Oakes, Joseph Eron, Kevin Robertson, William Powers
Summary: In recently diagnosed PLHIV, there was no association found between rCBF or rCMRO(2) and cognitive impairment at baseline. However, there was a reduction in rCMRO(2) in patients with worsening cognitive function after 12 months of ART. Reduction in rCMRO(2) may serve as a biomarker for cognitive decline in PLHIV.
EUROPEAN JOURNAL OF NEUROLOGY
(2022)
Article
Neurosciences
L. N. Shoemaker, L. C. Wilson, S. J. E. Lucas, L. Machado, R. J. Walker, J. D. Cotter
Summary: The study found that cognitive function remains largely resilient against acutely reduced cerebral blood flow in healthy adults, with no significant impairment observed. Older adults showed poorer cognitive performance and lower cerebral blood flow compared to younger adults, but similar cerebrovascular reactivity and autoregulation.
JOURNAL OF PHYSIOLOGY-LONDON
(2021)
Article
Endocrinology & Metabolism
Damian M. Bailey, Anthony R. Bain, Ryan L. Hoiland, Otto F. Barak, Ivan Drvis, Christophe Hirtz, Sylvain Lehmann, Nicola Marchi, Damir Janigro, David B. MacLeod, Philip N. Ainslie, Zeljko Dujic
Summary: In this study, it was found that prolonged apnea duration during voluntary asphyxia leads to increased cerebral blood flow and blood-brain barrier permeability. The study highlights the critical role of hypoxemia and hypercapnia in BBB disruption.
JOURNAL OF CEREBRAL BLOOD FLOW AND METABOLISM
(2022)
Article
Neurosciences
Ahmed A. Khalil, Ayse C. Tanritanir, Ulrike Grittner, Evgeniya Kirilina, Arno Villringer, Jochen B. Fiebach, Ralf Mekle
Summary: In this study, the reproducibility of BOLD delay was assessed in 136 subjects with normal cerebral perfusion. The highest reproducibility was observed in the posterior cerebral artery territory. Overall, BOLD delay showed good reproducibility, but caution should be exercised when interpreting longitudinal BOLD delay changes that are either very small or located in certain brain regions.
HUMAN BRAIN MAPPING
(2023)
Article
Neurosciences
Monroe P. Turner, Yuguang Zhao, Dema Abdelkarim, Peiying Liu, Jeffrey S. Spence, Joanna L. Hutchison, Dinesh K. Sivakolundu, Binu P. Thomas, Nicholas A. Hubbard, Cuimei Xu, Kamil Taneja, Hanzhang Lu, Bart Rypma
Summary: This study found that aging affects the integrity of the neural-glial-vascular system, which is vital for neural-vascular coupling. In younger adults, the integrity of neural-vascular communication increases with higher visual stimulation frequency, while this is not significant in older adults. The results indicate age-related, demand-dependent failures in the neural-glial-vascular structures that comprise the neural-vascular coupling system.
Article
Multidisciplinary Sciences
Patricia Clement, Marco Castellaro, Thomas W. Okell, David L. Thomas, Pieter Vandemaele, Sara Elgayar, Aaron Oliver-Taylor, Thomas Kirk, Joseph G. Woods, Sjoerd B. Vos, Joost P. A. Kuijer, Eric Achten, Matthias J. P. van Osch, John A. Detre, Hanzhang Lu, David C. Alsop, Michael A. Chappell, Luis Hernandez-Garcia, Jan Petr, Henk J. M. M. Mutsaerts
Summary: ASL-BIDS is a standardized method for ASL data storage that can improve the reproducibility and data sharing of ASL research.
Article
Physiology
Hironori Watanabe, Shotaro Saito, Takuro Washio, Damian Miles Bailey, Shigehiko Ogoh
Summary: Gravitational stress selectively impairs dynamic cerebrovascular reactivity in the anterior cerebral circulation, while preserving reactivity in the posterior circulation.
FRONTIERS IN PHYSIOLOGY
(2022)
Article
Multidisciplinary Sciences
Yuji Uchiyama, Hiroyuki Sakai, Takafumi Ando, Atsumichi Tachibana, Norihiro Sadato
Summary: The study found that there is a positive correlation between V1 activity and flickering visual stimuli at different temporal frequencies in older adults, but no significant correlation with UFOV performance.
Article
Biochemical Research Methods
Arindam Biswas, Sadhu Moka, Andreas Muller, Ashwin B. Parthasarathy
Summary: A portable and fiber-less DCS laser source was developed as a low-cost alternative for illuminating tissue in DCS instruments. The accuracy and noise characteristics of the fiber-less DCS laser source were validated through experiments on controlled tissue-simulating phantoms and in humans, comparing them to traditional DCS light sources.
BIOMEDICAL OPTICS EXPRESS
(2021)
Article
Neuroimaging
Anita D. Barber, Brian S. Caffo, James J. Pekar, Stewart H. Mostofsky
BRAIN IMAGING AND BEHAVIOR
(2017)
Article
Psychiatry
Jun Hua, Allison S. Brandt, SeungWook Lee, Nicholas I. S. Blair, Yuankui Wu, Su Lui, Jaymin Patel, Andreia V. Faria, Issel Anne L. Lim, Paul G. Unschuld, James J. Pekar, Peter C. M. van Zijl, Christopher A. Ross, Russell L. Margolis
SCHIZOPHRENIA BULLETIN
(2017)
Article
Neurosciences
Feng Xu, Wenbo Li, Peiying Liu, Jun Hua, John J. Strouse, James J. Pekar, Hanzhang Lu, Peter C. M. van Zijl, Qin Qin
HUMAN BRAIN MAPPING
(2018)
Article
Neurosciences
Ying Cheng, Qin Qin, Peter C. M. van Zijl, James J. Pekar, Jun Hua
Article
Neurosciences
Ann S. Choe, Mary Beth Nebel, Anita D. Barber, Jessica R. Cohen, Yuting Xu, James J. Pekar, Brian Caffo, Martin A. Lindquist
Article
Clinical Neurology
Ann S. Choe, Cristina L. Sadowsky, Seth A. Smith, Peter C. M. van Zijl, James J. Pekar, Visar Belegu
Article
Neurosciences
Amanda F. Mejia, Mary Beth Nebel, Anita D. Barber, Ann S. Choe, James J. Pekar, Brian S. Caffo, Martin A. Lindquist
Article
Radiology, Nuclear Medicine & Medical Imaging
Haris I. Sair, Yousef Hannawi, Shanshan Li, Joshua Kornbluth, Athena Demertzi, Carol Di Perri, Russell Chabanne, Betty Jean, Habib Benali, Vincent Perlbarg, James Pekar, Charles-Edouard Luyt, Damien Galanaud, Lionel Velly, Louis Puybasset, Steven Laureys, Brian Caffo, Robert D. Stevens
Article
Psychiatry
Jun Hua, Nicholas I. S. Blair, Adrian Paez, Ann Choe, Anita D. Barber, Allison Brandt, Issel Anne L. Lim, Feng Xu, Vidyulata Kamath, James J. Pekar, Peter C. M. van Zijl, Christopher A. Ross, Russell L. Margolis
SCHIZOPHRENIA RESEARCH
(2019)
Article
Neurosciences
Heather Shappell, Brian S. Caffo, James J. Pekar, Martin A. Lindquist
Article
Neurosciences
Hamed Honari, Ann S. Choe, James J. Pekar, Martin A. Lindquist
Article
Clinical Neurology
X. Li, D. Wang, S. Liao, L. Guo, X. Xiao, X. Liu, Y. Xu, J. Hua, J. J. Pillai, Y. Wu
AMERICAN JOURNAL OF NEURORADIOLOGY
(2020)
Article
Neurosciences
Heather M. Shappell, Kelly A. Duffy, Keri S. Rosch, James J. Pekar, Stewart H. Mostofsky, Martin A. Lindquist, Jessica R. Cohen
Summary: Studies have found that children with ADHD spend less time in certain states involving default mode network and task-related networks compared to typically developing children, and they switch states more quickly. Additionally, children with ADHD spend more time in a hyperconnected state.
Article
Biophysics
Di Cao, Yuanqi Sun, Yinghao Li, Pan Su, Jay J. Pillai, Ye Qiao, Hanzhang Lu, Peter C. M. Van Zijl, Linda Knutsson, Jun Hua
Summary: Recent studies have shown the importance of studying the interaction between the microvascular and lymphatic systems in the brain. Most imaging methods can only measure blood or lymphatic vessels separately, but this study attempts to develop an approach that can measure both in a single scan. The proposed method showed consistent results in healthy subjects and can detect Gd-induced signal changes in blood and CSF simultaneously.
NMR IN BIOMEDICINE
(2023)