Diffusion tensor imaging is unique in its ability to non-invasively visualize white matter fiber tracts in the human brain in vivo. White matter fiber bundles of the human brain form a spatial defined by the anatomical and functional architecture. Determination of axonal pathways provides an invaluable means to study the connectivity of human brain and its functional network. Comparison of fiber tract properties across subjects requires comparison at corresponding anatomical locations. In this paper, we present application of white matter tractography method based on incoherent motion of water molecules in fiber tissue, mainly in central nervous system. This motion is itself dependent on the micro-structural environment that restricts the movement of the water molecules. In white matter fibers there is a pronounced directional dependence on diffusion. With white matter fiber tracking or tractography, projections among brain regions can be detected in the three-dimentional diffusion tensor dataset according to the directionality of the fibers. The authors indicate diagnostic possibilities of MR tractography in otolaryngology for imaging the nervous tracts of sense of hearing, smell and taste with particular consideration of otoneurological evaluation of patients with cochlear implants and bone anchored hearing aid (BAHA). White matter tracts can be evaluated independently by using diffusion tensor tractography, which appears to be a promising technique for determining changes in white matter in degenerative disease. The authors also indicate that method as a beneficial in the surgical planning for patients with intrinsic brain tumors.
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http://dx.doi.org/10.1016/S0030-6657(09)70151-9 | DOI Listing |
PLoS One
January 2025
Aston Institute of Health and Neurodevelopment, Aston University, Birmingham, United Kingdom.
Survivors of pediatric brain tumours are at a high risk of cognitive morbidity. Reliable individual-level predictions regarding the likelihood, degree, and affected domains of cognitive impairment would be clinically beneficial. While established risk factors exist, quantitative MRI analysis may enhance predictive value, above and beyond current clinical risk models.
View Article and Find Full Text PDFHealth Secur
January 2025
Richard C. White, PhD, is an Interdisciplinary Scientist, Medical Countermeasures Program; Peter L. Adams, PhD, and Karl J. Erlandson, PhD, are Interdisciplinary Scientists, and Ramya Natarajan, PhD, is a Health Scientist, Influenza and Emerging Infectious Diseases Division; Kyla A. Britson, PhD, Rushyannah Killens-Cade, PhD, and Malen A. Link, PhD, are Interdisciplinary Scientists, and Daniel N. Wolfe, PhD, is Deputy Director, Division of Chemical, Biological, Radiological, and Nuclear (CBRN) Countermeasures; Derek L. Eisnor, MD, is a Medical Officer, Division of Clinical Development; Brenda L. Fredericksen, PhD, is Program Director, Nonclinical Research Program, and James Little, MS, is a Senior Scientific Advisor, Division of Nonclinical Development; John S. Lee, PhD, is Program Director, Molecular Diagnostics Program, and Julie M. Villanueva, PhD, is a Scientific Advisor, Detection, Diagnostics, and Devices Infrastructure Division; Kimberly L. Sciarretta, PhD, is Program Director, Launch Office, Division of Research, Innovation, and Ventures; and Robert A. Johnson, PhD, is Director, Medical Countermeasures Program; all at the Biomedical Advanced Research and Development Authority, Washington, DC. Gerald R. Kovacs, PhD, is a Senior Advisor; Huyen Cao, MD, is a Senior Clinical Studies Analyst; Christopher Dale, PhD, and Mark Michalik, MBA, are Senior Subject Matter Experts; Mario H. Skiadopoulos, PhD, is a Preclinical Drug Development Subject Matter Expert; and Xiaomi Tong, PhD, is a Senior Regulatory Affairs Subject Matter Expert; all at Tunnell Government Services, Berwyn, PA. Suchismita Chandran, PhD, is a Lead Associate, and Michael Rowe, MS, is a Senior Consultant; both at Booz Allen Hamilton, McLean, VA. Ethan J. Fritch, PhD, is an ORISE Fellow, Oak Ridge Institute for Science and Education, Oak Ridge, TN. George Robertson, PhD, is Chief Scientific Officer, Cambra Consulting, Inc., Woodbridge, VA.
The COVID-19 pandemic has revealed the need for nations to prepare more effectively for emerging infectious diseases. Preparing for these threats requires a multifaceted approach that includes assessing pathogen threat, building flexible capabilities for rapid medical countermeasure (MCM) development, and exercising, maintaining, and improving those response capabilities. The Biomedical Advanced Research and Development Authority (BARDA) promotes the advanced development of MCMs in response to natural and manmade threats.
View Article and Find Full Text PDFStroke
January 2025
Neurology and Radiology, Massachusetts General Hospital, UNITED STATES.
Cerebral autosomal-dominant arteriopathy, subcortical infarcts, and leukoencephalopathy (CADASIL) is the most prevalent monogenic inherited cause of cerebral small-vessel disease. Despite its prevalence, there is currently no proven therapy to prevent or reverse the progression of the disease. This study aimed to characterize the functional integrity of long white matter tracts in CADASIL transgenic mice, both with and without focal white matter lesions in the corpus callosum added on, utilizing optical resting-state functional connectivity imaging alongside behavioral examinations.
View Article and Find Full Text PDFJ Brachial Plex Peripher Nerve Inj
January 2025
School of Health Sciences, Manchester Academic Health Science Centre, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, United Kingdom.
GABA (γ-aminobutyric acid) is the major inhibitory neurotransmitter in the brain. In response to injury within the central nervous system, GABA promotes cortical plasticity and represents a potential pharmacological target to improve functional recovery. However, it is unclear how GABA changes in the brain after traumatic brachial plexus injuries (tBPIs) which represents the rationale for this pilot study.
View Article and Find Full Text PDFBrain Commun
January 2025
Department of Neurology, The First Affiliated Hospital, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Diagnosis and Treatment of Major Neurological Diseases, National Key Clinical Department and Key Discipline of Neurology, Guangzhou 510080, China.
Although aberrant changes in grey and white matter are core features of idiopathic dystonia, few studies have explored the correlation between grey and white matter changes in this disease. This study aimed to investigate the coupling correlation between morphological and microstructural alterations in patients with idiopathic dystonia. Structural T1 imaging and diffusion tensor imaging were performed on a relatively large cohort of patients.
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