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Mild concussions

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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/28058207/memory-loss-five-new-things
#3
Ferenc Deak, Nidhi Kapoor, Calin Prodan, Linda A Hershey
PURPOSE OF REVIEW: Memory loss can be due to a wide variety of causes. We provide new information about the biology of common genetic and acquired causes of memory loss in older adults. RECENT FINDINGS: New data are available about the genetics of Alzheimer disease (AD), dementia with Lewy bodies (DLB), and frontotemporal dementia. Amyloid PET, FDG-PET, and MRI have improved our understanding of how mild cognitive impairment evolves to AD. Several studies have shown links between concussion and chronic traumatic encephalopathy...
December 2016: Neurology. Clinical Practice
https://www.readbyqxmd.com/read/28056045/further-development-of-the-assessment-of-military-multitasking-performance-iterative-reliability-testing
#4
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
#5
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
#6
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
#7
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
#8
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
#9
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
#10
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
#11
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/27984100/air-puff-induced-vocalizations-a-novel-approach-to-detecting-negative-affective-state-following-concussion-in-rats
#12
Jenny R Browning, Ashley C Whiteman, Lai Yee Leung, Xi-Chun May Lu, Deborah A Shear
BACKGROUND: Negative emotional states resulting from concussion are of increasing concern. In the current study, we developed a model to investigate negative affect following concussion in the projectile concussive injury (PCI) model. High frequency ultrasonic vocalizations (22kHz USVs) are associated with negative affective stimuli in rats. Changes in negative affective state were examined following PCI using a mild air-puff stimulus to elicit 22kHz USVs. NEW METHOD: Forty-eight hours post-injury animals were placed into a clean acrylic box lined with bedding...
October 29, 2016: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/27919376/usability-evaluation-of-the-smart-application-for-youth-with-mtbi
#13
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
#14
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
#15
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
#16
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
#17
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/27904755/paraplegia-caused-by-cerebral-contusions-in-the-bilateral-precentral-gyri
#18
Hideaki Matsumura, Hiroyuki Fujimori, Naoaki Sato, Akira Matsumura
BACKGROUND: Paraplegia is mainly caused by spinal cord disease and rarely occurs due to head trauma. In this report, we describe a case of paraplegia caused by cerebral contusions in the bilateral precentral gyri. CASE DESCRIPTION: A 72-year-old man was admitted to our hospital with mildly impaired consciousness and severe pure motor paralysis in both legs. He was healthy until the morning of the day, but his wife found him injured in front of his house upon returning home...
2016: Surgical Neurology International
https://www.readbyqxmd.com/read/27902865/small-world-properties-changes-in-mild-traumatic-brain-injury
#19
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/27900167/scat2-and-scat3-scores-at-baseline-and-after-sports-related-mild-brain-injury-concussion-qualitative-synthesis-with-weighted-means
#20
Roger E Thomas, Jorge Alves, Marcus M Vaska, Rosana Magalhães
OBJECTIVE: Identify all Sport Concussion Assessment Tool (SCAT2/3) studies, compare baseline and postconcussion results. DESIGN: Systematic review (qualitative synthesis, weighted means). DATA SOURCES: 18 databases, 9 grey literature resources searched for SCAT2/3 data; 9150 articles identified, titles/abstracts assessed/data-entry independently by two reviewers. ELIGIBILITY CRITERIA FOR SELECTING STUDIES: Any studies reporting partial/complete SCAT2/3 data...
2016: BMJ Open Sport & Exercise Medicine
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