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Concussion, mild traumatic brain injury

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https://www.readbyqxmd.com/read/28078102/repeated-mild-traumatic-brain-injury-causes-focal-response-in-lateral-septum-and-hippocampus
#1
Rebecca Acabchuk, Denise I Briggs, Mariana Angoa-Pérez, Meghan Powers, Richard Wolferz, Melanie Soloway, Mai Stern, Lillian R Talbot, Donald M Kuhn, Joanne C Conover
AIM: To advance our understanding of regional and temporal cellular responses to repeated mild traumatic brain injury (rmTBI), we used a mouse model of rmTBI that incorporated acceleration, deceleration and rotational forces. MATERIALS & METHODS: A modified weight-drop method was used to compare two inter-injury intervals, rmTBI-short (five hits delivered over 3 days) and rmTBI-long (five hits delivered over 15 days). Regional investigations of forebrain and midbrain histological alterations were performed at three post-injury time points (immediate, 2 weeks and 6 weeks)...
December 2016: Concussion
https://www.readbyqxmd.com/read/28077398/mild-traumatic-brain-injury-is-associated-with-reduced-cortical-thickness-in-those-at-risk-for-alzheimer-s-disease
#2
Jasmeet P Hayes, Mark W Logue, Naomi Sadeh, Jeffrey M Spielberg, Mieke Verfaellie, Scott M Hayes, Andrew Reagan, David H Salat, Erika J Wolf, Regina E McGlinchey, William P Milberg, Annjanette Stone, Steven A Schichman, Mark W Miller
Moderate-to-severe traumatic brain injury is one of the strongest environmental risk factors for the development of neurodegenerative diseases such as late-onset Alzheimer's disease, although it is unclear whether mild traumatic brain injury, or concussion, also confers risk. This study examined mild traumatic brain injury and genetic risk as predictors of reduced cortical thickness in brain regions previously associated with early Alzheimer's disease, and their relationship with episodic memory. Participants were 160 Iraq and Afghanistan War veterans between the ages of 19 and 58, many of whom carried mild traumatic brain injury and post-traumatic stress disorder diagnoses...
January 11, 2017: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/28056045/further-development-of-the-assessment-of-military-multitasking-performance-iterative-reliability-testing
#3
Margaret M Weightman, Karen L McCulloch, Mary V Radomski, Marsha Finkelstein, Amy S Cecchini, Leslie F Davidson, Kristin J Heaton, Laurel B Smith, Matthew R Scherer
The Assessment of Military Multitasking Performance (AMMP) is a battery of functional dual-tasks and multitasks based on military activities that target known sensorimotor, cognitive, and exertional vulnerabilities after concussion/mild traumatic brain injury (mTBI). The AMMP was developed to help address known limitations in post concussive return to duty assessment and decision making. Once validated, the AMMP is intended for use in combination with other metrics to inform duty-readiness decisions in Active Duty Service Members following concussion...
2017: PloS One
https://www.readbyqxmd.com/read/28042930/three-versus-seven-days-to-return-to-work-after-mild-traumatic-brain-injury-a-randomised-parallel-group-trial-with-neuropsychological-assessment
#4
Aline M Studerus-Germann, Doortje C Engel, Martin N Stienen, Dieter von Ow, Gerhard Hildebrandt, Oliver P Gautschi
Although most patients with a mild traumatic brain injury (mTBI) recover within days to weeks, some experience persistent physical, cognitive and emotional symptoms, often described as postconcussion syndrome (PCS). The optimal recovery time including return-to-work (RTW) after mTBI is unclear. In this single-centre parallel-group trial, patients assigned three days (3D-group) or seven days (7D-group) sick leave were compared with a comprehensive neuropsychological test battery including the Post Concussion Symptom Scale (PCSS) within one week, after three and twelve months post-injury...
January 2, 2017: International Journal of Neuroscience
https://www.readbyqxmd.com/read/28032118/biomarkers-of-traumatic-brain-injury-temporal-changes-in-body-fluids
#5
REVIEW
Harel Adrian, Kvist Mårten, Nuutinen Salla, Välimaa Lasse
Traumatic brain injuries (TBIs) are caused by a hit to the head or a sudden acceleration/deceleration movement of the head. Mild TBIs (mTBIs) and concussions are difficult to diagnose. Imaging techniques often fail to find alterations in the brain, and computed tomography exposes the patient to radiation. Brain-specific biomolecules that are released upon cellular damage serve as another means of diagnosing TBI and assessing the severity of injury. These biomarkers can be detected from samples of body fluids using laboratory tests...
November 2016: ENeuro
https://www.readbyqxmd.com/read/28030519/incorporating-a-computerized-cognitive-battery-into-the-emergency-department-care-of-pediatric-mild-traumatic-brain-injuries-is-it-feasible
#6
Aneesh M Khetani, Brian L Brooks, Angelo Mikrogianakis, Karen M Barlow
OBJECTIVES: The use of computers to test cognitive function acutely after a concussion is becoming increasingly popular, especially after sport-related concussion. Although commonly performed in the community, it is not yet performed routinely in the emergency department (ED), where most injured children present. The challenges of performing computerized cognitive testing (CCT) in a busy ED are considerable. The aim of this study was to evaluate the feasibility of CCT in the pediatric ED after concussion...
December 28, 2016: Pediatric Emergency Care
https://www.readbyqxmd.com/read/28018987/eeg-slow-waves-in-traumatic-brain-injury-convergent-findings-in-mouse-and-man
#7
Mo Modarres, Nicholas N Kuzma, Tracy Kretzmer, Allan I Pack, Miranda M Lim
OBJECTIVE: Evidence from previous studies suggests that greater sleep pressure, in the form of EEG-based slow waves, accumulates in specific brain regions that are more active during prior waking experience. We sought to quantify the number and coherence of EEG slow waves in subjects with mild traumatic brain injury (mTBI). METHODS: We developed a method to automatically detect individual slow waves in each EEG channel, and validated this method using simulated EEG data...
July 1, 2016: Neurobiology of Sleep and Circadian Rhythms
https://www.readbyqxmd.com/read/28007313/neuropsychological-alterations-and-neuroradiological-findings-in-patients-with-post-traumatic-concussion-results-of-a-pilot-study
#8
A Rădoi, M A Poca, V Cañas, J M Cevallos, L Membrado, M C Saavedra, M Vidal, F Martínez-Ricarte, J Sahuquillo
INTRODUCTION: Mild traumatic brain injury (mTBI) has traditionally been considered to cause no significant brain damage since symptoms spontaneously remit after a few days. However, this idea is facing increasing scrutiny. The purpose of this study is to demonstrate the presence of early cognitive alterations in a series of patients with mTBI and to link these findings to different markers of brain damage. METHODS: We conducted a prospective study of a consecutive series of patients with mTBI who were evaluated over a 12-month period...
December 19, 2016: Neurología: Publicación Oficial de la Sociedad Española de Neurología
https://www.readbyqxmd.com/read/28006970/phase-ii-clinical-trial-of-atorvastatin-in-mild-traumatic-brain-injury
#9
Claudia S Robertson, James J McCarthy, Emmy R Miller, Harvey Levin, Stephen R McCauley, Paul R Swank
Statins constitute a class of medications commonly used in the treatment of elevated cholesterol. However, in experimental studies statins also have other non-cholesterol mediated mechanisms of action, which may have neuroprotective effects. The purpose of this study was to determine if administration of atorvastatin for 7 days after injury would improve neurological recovery in patients with mild traumatic brain injury (mTBI). The hypothesis was that atorvastatin administration would reduce post-concussion symptoms and also that atorvastatin administration for one week post-injury would be safe...
December 22, 2016: Journal of Neurotrauma
https://www.readbyqxmd.com/read/28005070/auditory-biological-marker-of-concussion-in-children
#10
Nina Kraus, Elaine C Thompson, Jennifer Krizman, Katherine Cook, Travis White-Schwoch, Cynthia R LaBella
Concussions carry devastating potential for cognitive, neurologic, and socio-emotional disease, but no objective test reliably identifies a concussion and its severity. A variety of neurological insults compromise sound processing, particularly in complex listening environments that place high demands on brain processing. The frequency-following response captures the high computational demands of sound processing with extreme granularity and reliably reveals individual differences. We hypothesize that concussions disrupt these auditory processes, and that the frequency-following response indicates concussion occurrence and severity...
December 22, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27919376/usability-evaluation-of-the-smart-application-for-youth-with-mtbi
#11
Judith W Dexheimer, Brad G Kurowski, Shilo H Anders, Nicole McClanahan, Shari L Wade, Lynn Babcock
OBJECTIVE: There is a dearth of evidence-based treatments available to address the significant morbidity associated with mild traumatic brain injury (mTBI). To address this gap, we designed a novel user-friendly, web-based application. We describe the preliminary evaluation of feasibility and usability of the application to promote recovery following mTBI in youth, the Self-Monitoring Activity-Restriction and Relaxation Treatment (SMART). SMART incorporates real-time recommendations for individualized symptom management and activity restriction along with training in cognitive-behavioral coping strategies...
January 2017: International Journal of Medical Informatics
https://www.readbyqxmd.com/read/27916406/cortical-excitability-after-pediatric-mild-traumatic-brain-injury
#12
Trevor A Seeger, Adam Kirton, Michael J Esser, Clare Gallagher, Jeff Dunn, Ephrem Zewdie, Omar Damji, Patrick Ciechanski, Karen M Barlow
INTRODUCTION: Mild traumatic brain injury (mTBI) outcomes are variable, and 10-15% may suffer from prolonged symptoms beyond 3 months that impair the child's return to normal activities. Neurophysiological mechanisms of mTBI are incompletely understood, particularly in children, but alterations in cortical excitability have been proposed to underlie post-concussion syndrome. Improved understanding is required to advance interventions and improve outcomes. OBJECTIVE/HYPOTHESIS: To determine if cortical excitability is altered in children with mTBI, and its association with clinical symptoms...
November 19, 2016: Brain Stimulation
https://www.readbyqxmd.com/read/27913365/portable-mtbi-assessment-using-temporal-and-frequency-analysis-of-speech
#13
Louis Daudet, Nikhil Yadav, Matthew Perez, Christian Poellabauer, Sandra Schneider, Alan Huebner
This paper shows that extraction and analysis of various acoustic features from speech using mobile devices can allow the detection of patterns that could be indicative of neurological trauma. This may pave the way for new types of biomarkers and diagnostic tools. Toward this end, we created a mobile application designed to diagnose mild traumatic brain injuries (mTBI) such as concussions. Using this application, data was collected from youth athletes from 47 high schools and colleges in the the Midwestern United States...
December 1, 2016: IEEE Journal of Biomedical and Health Informatics
https://www.readbyqxmd.com/read/27910267/the-impact-of-patient-characteristics-on-nurse-practitioners-assessment-and-management-of-adolescent-concussion
#14
Janessa M Graves, Tracy A Klein
BACKGROUND AND PURPOSE: To evaluate the effect of patient sex and type of activity on concussion assessment and management recommendations. METHODS: We administered a web-based survey to all nurse practitioners (NPs) actively licensed in Washington and Oregon. Participants were randomized to view one of four standardized patient scenario videos of an adolescent seeking care for a concussion, portraying the same symptomology but differing by sex and activity (soccer/hiking)...
December 2, 2016: Journal of the American Association of Nurse Practitioners
https://www.readbyqxmd.com/read/27906973/detecting-mild-traumatic-brain-injury-using-resting-state-magnetoencephalographic-connectivity
#15
Vasily A Vakorin, Sam M Doesburg, Leodante da Costa, Rakesh Jetly, Elizabeth W Pang, Margot J Taylor
Accurate means to detect mild traumatic brain injury (mTBI) using objective and quantitative measures remain elusive. Conventional imaging typically detects no abnormalities despite post-concussive symptoms. In the present study, we recorded resting state magnetoencephalograms (MEG) from adults with mTBI and controls. Atlas-guided reconstruction of resting state activity was performed for 90 cortical and subcortical regions, and calculation of inter-regional oscillatory phase synchrony at various frequencies was performed...
December 2016: PLoS Computational Biology
https://www.readbyqxmd.com/read/27902865/small-world-properties-changes-in-mild-traumatic-brain-injury
#16
Yongxia Zhou
PURPOSE: To investigate local and global efficiency changes characterized by small-world properties based on resting-state functional MRI, such as centrality and clustering coefficient, in mild traumatic brain injury (MTBI) patients; and to associate these findings with axonal injury as measured by diffusion tensor imaging (DTI) as well as with post-concussive symptom (PCS). MATERIALS AND METHODS: Thirty patients (mean age 35 ± 13 years) with clinically defined MTBI and 45 age-matched healthy controls (mean age 37 ± 10 years) participated in the experiments...
November 30, 2016: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/27899434/development-of-cgrp-dependent-pain-and-headache-related-behaviours-in-a-rat-model-of-concussion-implications-for-mechanisms-of-post-traumatic-headache
#17
Dara Bree, Dan Levy
BACKGROUND AND OBJECTIVE: Posttraumatic headache (PTH) is one of the most common, debilitating and difficult symptoms to manage after a mild traumatic brain injury, or concussion. However, the mechanisms underlying PTH remain elusive, in part due to the lack of a clinically relevant animal model. Here, we characterized for the first time, headache and pain-related behaviours in a rat model of concussion evoked by a mild closed head injury (mCHI) - the major type of military and civilian related trauma associated with PTH - and tested responses to current and novel headache therapies...
November 29, 2016: Cephalalgia: An International Journal of Headache
https://www.readbyqxmd.com/read/27889010/neuropsychiatric-aspects-of-concussion
#18
REVIEW
Rajiv Radhakrishnan, Amir Garakani, Lawrence S Gross, Marcia K Goin, Janet Pine, Andrew E Slaby, Calvin R Sumner, David A Baron
Over the past decade, concussion has become the most widely discussed injury in contact sports. However, concussions also occur in several other settings, such as non-contact sports, elderly individuals, young children, military personnel, and victims of domestic violence. Concussion is frequently undiagnosed as a cause of psychiatric morbidity, especially when the patient has no history of loss of consciousness or direct head trauma. Almost all of the extant literature focuses on traumatic brain injury and assumes that concussion is merely a mild form of traumatic brain injury, which has resulted in a lack of understanding about what concussion is, and how to diagnose, monitor, and treat its varied neuropsychiatric symptoms...
December 2016: Lancet Psychiatry
https://www.readbyqxmd.com/read/27886529/autobiographical-and-episodic-memory-deficits-in-mild-traumatic-brain-injury
#19
Jeffrey D Wammes, Tyler J Good, Myra A Fernandes
Those who have suffered a concussion, otherwise known as a mild traumatic brain injury (mTBI), often complain of lingering memory problems. However, there is little evidence in the behavioral literature reliably demonstrating memory deficits. Thus, in the present study, cognitive profiles including measures of general executive functioning and processing speed, as well as episodic and semantic memory were collected in younger and older adult participants with or without a remote (>1year prior to testing) mTBI...
February 2017: Brain and Cognition
https://www.readbyqxmd.com/read/27880054/elucidating-the-role-of-compression-waves-and-impact-duration-for-generating-mild-traumatic-brain-injury-in-rats
#20
Brandon P Lucke-Wold, Michael Phillips, Ryan C Turner, Aric F Logsdon, Kelly E Smith, Jason D Huber, Charles L Rosen, Jonathan D Regele
BACKGROUND: In total, 3.8 million concussions occur each year in the US leading to acute functional deficits, but the underlying histopathologic changes that occur are relatively unknown. In order to improve understanding of acute injury mechanisms, appropriately designed pre-clinical models must be utilized. METHODS: The clinical relevance of compression wave injury models revolves around the ability to produce consistent histopathologic deficits. Mild traumatic brain injuries activate similar neuroinflammatory cascades, cell death markers and increases in amyloid precursor protein in both humans and rodents...
November 23, 2016: Brain Injury: [BI]
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