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TBI Neuroimaging

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https://www.readbyqxmd.com/read/29433912/factors-influencing-emergency-department-care-of-young-children-at-risk-for-clinically-important-traumatic-brain-injury
#1
Tara Rhine, Shari L Wade, Nanhua Zhang, Huaiyu Zang, Stephanie Kennebeck, Lynn Babcock
OBJECTIVES: Care decisions for young children presenting to the emergency department (ED) with head injury are often challenging (e.g. whether to obtain neuroimaging). We sought to identify factors associated with acute management of children at-risk for clinically important traumatic brain injury (ciTBI) and describe symptom management. METHODS: Observational evaluation of children, ages 0-4years, presenting to a pediatric ED following minor head injury. Children with ≥1 risk element per the Pediatric Emergency Care Academic Research Network's decision rule were deemed "at-risk" for ciTBI...
January 31, 2018: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/29404847/human-brain-modeling-with-its-anatomical-structure-and-realistic-material-properties-for-brain-injury-prediction
#2
Noritoshi Atsumi, Yuko Nakahira, Eiichi Tanaka, Masami Iwamoto
Impairments of executive brain function after traumatic brain injury (TBI) due to head impacts in traffic accidents need to be obviated. Finite element (FE) analyses with a human brain model facilitate understanding of the TBI mechanisms. However, conventional brain FE models do not suitably describe the anatomical structure in the deep brain, which is a critical region for executive brain function, and the material properties of brain parenchyma. In this study, for better TBI prediction, a novel brain FE model with anatomical structure in the deep brain was developed...
February 5, 2018: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/29385016/fatigue-is-associated-with-global-and-regional-thalamic-morphometry-in-veterans-with-a-history-of-mild-traumatic-brain-injury
#3
Alexandra L Clark, Scott F Sorg, Kelsey Holiday, Erin D Bigler, Katherine J Bangen, Nicole D Evangelista, Mark W Bondi, Dawn M Schiehser, Lisa Delano-Wood
OBJECTIVE: Fatigue is a complex, multidimensional phenomenon that commonly occurs following traumatic brain injury (TBI). The thalamus-a structure vulnerable to both primary and secondary injuries in TBI-is thought to play a pivotal role in the manifestation of fatigue. We explored how neuroimaging markers of local and global thalamic morphometry relate to the subjective experience of fatigue post-TBI. METHODS: Sixty-three Veterans with a history of mild TBI underwent structural magnetic resonance imaging and completed questionnaires related to fatigue and psychiatric symptoms...
January 30, 2018: Journal of Head Trauma Rehabilitation
https://www.readbyqxmd.com/read/29285732/emerging-approaches-to-neurocircuits-in-ptsd-and-tbi-imaging-the-interplay-of-neural-and-emotional-trauma
#4
Andrea D Spadoni, Mingxiong Huang, Alan N Simmons
Posttraumatic stress disorder (PTSD) and traumatic brain injury (TBI) commonly co-occur in general and military populations and have a number of overlapping symptoms. While research suggests that TBI is risk factor for PTSD and that PTSD may mediate TBI-related outcomes, the mechanisms of these relationships are not well understood. Neuroimaging may help elucidate patterns of neurocircuitry both specific and common to PTSD and TBI and thus help define the nature of their interaction, refine diagnostic classification, and may potentially yield opportunities for targeted treatments...
December 29, 2017: Current Topics in Behavioral Neurosciences
https://www.readbyqxmd.com/read/29262441/imaging-in-neurocritical-care-practice
#5
Craig Williamson, Larry Morgan, Joshua P Klein
The use of neuroimaging in conjunction with serial neurological examinations is a core component of modern neurocritical care practice. Although there is a growing role for other neuromonitoring techniques, the ability to quickly and accurately interpret images in the context of a patient's clinical status arguably remains the indispensable skill for neurocritical care practitioners. Due to its rapid acquisition time and excellent ability to detect intracerebral hemorrhage (ICH), cerebral edema, and signs of elevated intracranial pressure, computed tomography (CT) remains the most useful neuroimaging technique for intensive care unit (ICU) patients...
December 2017: Seminars in Respiratory and Critical Care Medicine
https://www.readbyqxmd.com/read/29250027/derivation-of-a-three-biomarker-panel-to-improve-diagnosis-in-patients-with-mild-traumatic-brain-injury
#6
W Frank Peacock, Timothy E Van Meter, Nazanin Mirshahi, Kyle Ferber, Robert Gerwien, Vani Rao, Haris Iqbal Sair, Ramon Diaz-Arrastia, Frederick K Korley
Background: Nearly 5 million emergency department (ED) visits for head injury occur each year in the United States, of which <10% of patients show abnormal computed tomography (CT) findings. CT negative patients frequently suffer protracted somatic, behavioral, and neurocognitive dysfunction. Our goal was to evaluate biomarkers to identify mild TBI (mTBI) in patients with suspected head injury. Methods: An observational ED study of head-injured and control patients was conducted at Johns Hopkins University (HeadSMART)...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/29249173/long-term-prospective-memory-impairment-following-mild-traumatic-brain-injury-with-loss-of-consciousness-findings-from-the-canadian-longitudinal-study-on-aging
#7
Marc Bedard, Vanessa Taler, Jason Steffener
OBJECTIVE: We aimed to examine the extent to which loss of consciousness (LOC) following mild traumatic brain injury (mTBI) may be associated with impairments in time- and event-based prospective memory (PM). PM is thought to involve executive processes and be subserved by prefrontal regions. Neuroimaging research suggests alterations to these areas of the brain several years after mTBI, particularly if LOC was experienced. However, it remains unclear whether impairments in time- or event-based functioning may persist more than a year after mTBI, and what the link with duration of LOC may be...
December 18, 2017: Clinical Neuropsychologist
https://www.readbyqxmd.com/read/29209266/current-opportunities-for-clinical-monitoring-of-axonal-pathology-in-traumatic-brain-injury
#8
REVIEW
Parmenion P Tsitsopoulos, Sami Abu Hamdeh, Niklas Marklund
Traumatic brain injury (TBI) is a multidimensional and highly complex disease commonly resulting in widespread injury to axons, due to rapid inertial acceleration/deceleration forces transmitted to the brain during impact. Axonal injury leads to brain network dysfunction, significantly contributing to cognitive and functional impairments frequently observed in TBI survivors. Diffuse axonal injury (DAI) is a clinical entity suggested by impaired level of consciousness and coma on clinical examination and characterized by widespread injury to the hemispheric white matter tracts, the corpus callosum and the brain stem...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/29198271/the-neuropsychology-of-traumatic-brain-injury-looking-back-peering-ahead
#9
Keith Owen Yeates, Harvey S Levin, Jennie Ponsford
The past 50 years have been a period of exciting progress in neuropsychological research on traumatic brain injury (TBI). Neuropsychologists and neuropsychological testing have played a critical role in these advances. This study looks back at three major scientific advances in research on TBI that have been critical in pushing the field forward over the past several decades: The advent of modern neuroimaging; the recognition of the importance of non-injury factors in determining recovery from TBI; and the growth of cognitive rehabilitation...
October 2017: Journal of the International Neuropsychological Society: JINS
https://www.readbyqxmd.com/read/29157853/perfusion-imaging-in-acute-traumatic-brain-injury
#10
REVIEW
David B Douglas, Ruchir Chaudhari, Jason M Zhao, James Gullo, Jared Kirkland, Pamela K Douglas, Ely Wolin, James Walroth, Max Wintermark
Traumatic brain injury (TBI) is a significant problem worldwide and neuroimaging plays a critical role in diagnosis and management. Recently, perfusion neuroimaging techniques have been explored in TBI to determine and characterize potential perfusion neuroimaging biomarkers to aid in diagnosis, treatment, and prognosis. In this article, computed tomography (CT) bolus perfusion, MR imaging bolus perfusion, MR imaging arterial spin labeling perfusion, and xenon CT are reviewed with a focus on their applications in acute TBI...
February 2018: Neuroimaging Clinics of North America
https://www.readbyqxmd.com/read/29157846/definition-of-traumatic-brain-injury-neurosurgery-trauma-orthopedics-neuroimaging-psychology-and-psychiatry-in-mild-traumatic-brain-injury
#11
REVIEW
Mubashir Pervez, Ryan S Kitagawa, Tiffany R Chang
Traumatic brain injury (TBI) disrupts the normal function of the brain. This condition can adversely affect a person's quality of life with cognitive, behavioral, emotional, and physical symptoms that limit interpersonal, social, and occupational functioning. Although many systems exist, the simplest classification includes mild, moderate, and severe TBI depending on the nature of injury and the impact on the patient's clinical status. Patients with TBI require prompt evaluation and multidisciplinary management...
February 2018: Neuroimaging Clinics of North America
https://www.readbyqxmd.com/read/29155947/dementia-after-moderate-severe-traumatic-brain-injury-coexistence-of-multiple-proteinopathies
#12
Kimbra Kenney, Diego Iacono, Brian L Edlow, Douglas I Katz, Ramon Diaz-Arrastia, Kristen Dams-O'Connor, Daniel H Daneshvar, Allison Stevens, Allison L Moreau, Lee S Tirrell, Ani Varjabedian, Anastasia Yendiki, Andre van der Kouwe, Azma Mareyam, Jennifer A McNab, Wayne A Gordon, Bruce Fischl, Ann C McKee, Daniel P Perl
We report the clinical, neuroimaging, and neuropathologic characteristics of 2 patients who developed early onset dementia after a moderate-severe traumatic brain injury (TBI). Neuropathological evaluation revealed abundant β-amyloid neuritic and cored plaques, diffuse β-amyloid plaques, and frequent hyperphosphorylated-tau neurofibrillary tangles (NFT) involving much of the cortex, including insula and mammillary bodies in both cases. Case 1 additionally showed NFTs in both the superficial and deep cortical layers, occasional perivascular and depth-of-sulci NFTs, and parietal white matter rarefaction, which corresponded with decreased parietal fiber tracts observed on ex vivo MRI...
November 16, 2017: Journal of Neuropathology and Experimental Neurology
https://www.readbyqxmd.com/read/29089921/the-neurological-wake-up-test-a-role-in-neurocritical-care-monitoring-of-traumatic-brain-injury-patients
#13
REVIEW
Niklas Marklund
The most fundamental clinical monitoring tool in traumatic brain injury (TBI) patients is the repeated clinical examination. In the severe TBI patient treated by continuous sedation in a neurocritical care (NCC) unit, sedation interruption is required to enable a clinical evaluation (named the neurological wake-up test; NWT) assessing the level of consciousness, pupillary diameter and reactivity to light, and presence of focal neurological deficits. There is a basic conflict regarding the NWT in the NCC setting; can the clinical information obtained by the NWT justify the risk of inducing a stress response in a severe TBI patient? Furthermore, in the presence of advanced multimodal monitoring and neuroimaging, is the NWT necessary to identify important clinical alterations? In studies of severe TBI patients, the NWT was consistently shown to induce a stress reaction including brief increases in intracranial pressure (ICP) and changes in cerebral perfusion pressure (CPP)...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/29051745/traumatic-brain-injury-severity-neuropathophysiology-and-clinical-outcome-insights-from-multimodal-neuroimaging
#14
Andrei Irimia, Sheng-Yang Matthew Goh, Adam C Wade, Kavi Patel, Paul M Vespa, John D Van Horn
BACKGROUND: The relationship between the acute clinical presentation of patients with traumatic brain injury (TBI), long-term changes in brain structure prompted by injury and chronic functional outcome is insufficiently understood. In this preliminary study, we investigate how acute Glasgow coma score (GCS) and epileptic seizure occurrence after TBIs are statistically related to functional outcome (as quantified using the Glasgow Outcome Score) and to the extent of cortical thinning observed 6 months after the traumatic event...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/29032776/neuropsychological-recovery-trajectories-in-moderate-to-severe-traumatic-brain-injury-influence-of-patient-characteristics-and-diffuse-axonal-injury
#15
Amanda R Rabinowitz, Tessa Hart, John Whyte, Junghoon Kim
OBJECTIVES: The goal of the present study was to elucidate the influence of demographic and neuropathological moderators on the longitudinal trajectory neuropsychological functions during the first year after moderate to severe traumatic brain injury (TBI). In addition to examining demographic moderators such as age and education, we included a measure of whole-brain diffuse axonal injury (DAI), and examined measures of processing speed (PS), executive function (EF), and verbal learning (VL) separately...
October 16, 2017: Journal of the International Neuropsychological Society: JINS
https://www.readbyqxmd.com/read/28981347/neuroimaging-of-deployment-associated-traumatic-brain-injury-tbi-with-a-focus-on-mild-tbi-mtbi-since-2009
#16
David H Salat, Meghan E Robinson, Danielle R Miller, Dustin C Clark, Regina E McGlinchey
OBJECTIVES: A substantial body of recent research has aimed to better understand the clinical sequelae of military trauma through the application of advanced brain imaging procedures in Veteran populations. The primary objective of this review was to highlight a portion of these recent studies to demonstrate how imaging tools can be used to understand military-associated brain injury. METHODS: We focus here on the phenomenon of mild traumatic brain injury (mTBI) given its high prevalence in the Veteran population and current recognition of the need to better understand the clinical implications of this trauma...
2017: Brain Injury: [BI]
https://www.readbyqxmd.com/read/28938340/paediatric-traumatic-brain-injury-prognostic-insights-and-outlooks
#17
Alicia K Au, Robert S B Clark
PURPOSE OF REVIEW: Traumatic brain injury (TBI) is a leading cause of death and disability in children. Prognostication of outcome following TBI is challenging in this population and likely requires complex, multimodal models to achieve clinically relevant accuracy. This review highlights injury characteristics, physiological indicators, biomarkers and neuromonitoring modalities predictive of outcome that may be integrated for future development of sensitive and specific prognostic models...
December 2017: Current Opinion in Neurology
https://www.readbyqxmd.com/read/28883806/functional-neuroimaging-in-traumatic-brain-injury-from-nodes-to-networks
#18
REVIEW
John D Medaglia
Since the invention of functional magnetic resonance imaging (fMRI), thousands of studies in healthy and clinical samples have enlightened our understanding of the organization of cognition in the human brain and neuroplastic changes following brain disease and injury. Increasingly, studies involve analyses rooted in complex systems theory and analysis applied to clinical samples. Given the complexity in available approaches, concise descriptions of the theoretical motivation of network techniques and their relationship to traditional approaches and theory are necessary...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28818271/the-vestibulocochlear-bases-for-wartime-posttraumatic-stress-disorder-manifestations
#19
T A Tigno, R A Armonda, R S Bell, M A Severson
Preliminary findings based on earlier retrospective studies of 229 wartime head injuries managed by the Walter Reed Army Medical Center (WRAMC)/National Naval Medical Center (NNMC) Neurosurgery Service during the period 2003-08 detected a threefold rise in Posttraumatic Stress Disorder (PTSD) manifestations (10.45%) among Traumatic Brain Injuries (TBI) having concomitant vestibulocochlear injuries compared to 3% for the TBI group without vestibulo-cochlear damage (VCD), prompting the authors to undertake a more focused study of the vestibulo-auditory pathway in explaining the development of posttraumatic stress disorder manifestations among the mostly Blast-exposed head-injured...
September 2017: Medical Hypotheses
https://www.readbyqxmd.com/read/28769858/dedifferentiation-does-not-account-for-hyperconnectivity-after-traumatic-brain-injury
#20
Rachel Anne Bernier, Arnab Roy, Umesh Meyyappan Venkatesan, Emily C Grossner, Einat K Brenner, Frank Gerard Hillary
OBJECTIVE: Changes in functional network connectivity following traumatic brain injury (TBI) have received increasing attention in recent neuroimaging literature. This study sought to understand how disrupted systems adapt to injury during resting and goal-directed brain states. Hyperconnectivity has been a common finding, and dedifferentiation (or loss of segregation of networks) is one possible explanation for this finding. We hypothesized that individuals with TBI would show dedifferentiation of networks (as noted in other clinical populations) and these effects would be associated with cognitive dysfunction...
2017: Frontiers in Neurology
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