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https://www.readbyqxmd.com/read/28527191/understanding-how-a-sport-helmet-protects-the-head-from-closed-injury-by-virtual-impact%C3%A2-tests
#1
Yunhua Luo, Zhaoyang Liang
Understanding how a helmet protects the head, especially the soft brain tissues, is the prerequisite for improving helmet design. Intracranial pressure and stresses/strains in the brain tissues are the direct indicators of traumatic brain injury and they can be used to measure helmet performance. In this study, the effects of helmet design parameters such as the helmet shell stiffness, liner compliance and thickness on the brain injury indicators were investigated by virtual impact tests. A finite element head model (FEHM) was first constructed from medical images; a personally-fitted helmet made of composite material and foam was virtually prototyped using geometric information extracted from the FEHM; a helmet-head finite element model was then assembled...
2017: Bio-medical Materials and Engineering
https://www.readbyqxmd.com/read/28527083/shared-mechanisms-of-epilepsy-migraine-and-affective-disorders
#2
Davide Zarcone, Simona Corbetta
Since the nineteenth century several clinical features have been observed in common between migraine and epilepsy (such as episodic attacks, triggering factors, presence of aura, frequent familiarity), but only in recent years researchers have really engaged in finding a common pathogenic mechanism. From studies of disease incidence, we understand how either migraine among patients with epilepsy or epilepsy among migraine patients are more frequent than in the general population. This association may result from a direct causality, by the same environmental risk factors and/or by a common genetic susceptibility...
May 2017: Neurological Sciences
https://www.readbyqxmd.com/read/28526435/the-bidirectional-gut-brain-microbiota-axis-as-a-potential-nexus-between-traumatic-brain-injury-inflammation-and-disease
#3
Mark H Sundman, Nan-Kuei Chen, Vignesh Subbian, Ying-Hui Chou
As head injuries and their sequelae have become an increasingly salient matter of public health, experts in the field have made great progress elucidating the biological processes occurring within the brain at the moment of injury and throughout the recovery thereafter. Given the extraordinary rate at which our collective knowledge of neurotrauma has grown, new insights may be revealed by examining the existing literature across disciplines with a new perspective. This article will aim to expand the scope of this rapidly evolving field of research beyond the confines of the central nervous system (CNS)...
May 16, 2017: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/28525774/development-and-validation-of-a-physical-model-to-investigate-the-biomechanics-of-infant-head-impact
#4
M Jones, D Darwall, G Khalid, R Prabhu, A Kemp, O Arthurs, P Theobald
Head injury in childhood is the single most common cause of death or permanent disability from injury. However, despite its frequency and significance, there is little understanding of the response of a child's head to injurious loading. This is a significant limitation when making early diagnoses, informing clinical and/or forensic management or injury prevention strategies. With respect to impact vulnerability, current understanding is predominantly based on a few post-mortem-human-surrogate (PMHS) experiments...
April 13, 2017: Forensic Science International
https://www.readbyqxmd.com/read/28520686/clinical-correlates-to-assist-with-chronic-traumatic-encephalopathy-diagnosis-insights-from-a-novel-rodent-repeat-concussion-model
#5
Gretchen M Thomsen, Ara Ko, Megan Y Harada, Annie Ma, Livia Wyss, Patricia Haro, Jean-Philippe Vit, Pablo Avalos, Navpreet K Dhillon, Noell Cho, Oksana Shelest, Eric J Ley
INTRODUCTION: Chronic traumatic encephalopathy (CTE) is a neurodegenerative disease linked to repetitive head injuries. Chronic traumatic encephalopathy symptoms include changes in mood, behavior, cognition, and motor function; however, CTE is currently diagnosed only postmortem. Using a rat model of recurrent traumatic brain injury (TBI), we demonstrate rodent deficits that predict the severity of CTE-like brain pathology. METHODS: Bilateral, closed-skull, mild TBI was administered once per week to 35 wild-type rats; eight rats received two injuries (2×TBI), 27 rats received five injuries (5×TBI), and 13 rats were sham controls...
June 2017: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/28520680/acute-pediatric-monteggia-fractures-a-conservative-approach-to-stabilization
#6
Ian Foran, Vidyadhar V Upasani, Charles D Wallace, Elise Britt, Tracey P Bastrom, James D Bomar, Andrew T Pennock
BACKGROUND: In 2015, a multicenter study group proposed a treatment algorithm for pediatric Monteggia fractures based upon the ulnar fracture pattern. This strategy recommends surgical stabilization for all complete ulna fractures. The purpose of this study was to evaluate whether an initial nonoperative approach to pediatric Monteggia fractures resulted in poorer outcomes and a higher rate of complications. METHODS: This institutional review board approved retrospective study evaluated all Monteggia fractures presenting to a level 1 pediatric trauma center between 2008 and 2014...
May 17, 2017: Journal of Pediatric Orthopedics
https://www.readbyqxmd.com/read/28507965/posterior-hip-dislocation-with-ipsilateral-femoral-head-and-shaft-fracture-using-a-temporary-external-fixator-as-a-method-for-closed-reduction
#7
Abduljabbar Alhammoud, Masson Alnouri, Mahmood Ali Arbash, Abdul Moeen Baco
INTRODUCTION: Complex fractures are increasing because of various traumatic mechanisms. They drift from standard classifications, and their treatment is controversial. Of such cases are hip dislocations with associated fractures of the ipsilateral femur. CASE REPORT: This case report describes the condition of a 30-year-old man involved in a motor vehicle collision. Clinical examination, X-rays, and computed tomography scan revealed a posterior hip dislocation with an ipsilateral femoral head and mid-shaft fractures...
November 2016: Journal of Orthopaedic Case Reports
https://www.readbyqxmd.com/read/28504848/association-of-traumatic-head%C3%A2-injuries-and-maxillofacial-fractures-a-retrospective-study
#8
Maher M Abosadegh, Shaifulizan Ab Rahman, Norkhafizah Saddki
The association of traumatic head injury (THI) with maxillofacial fractures (MFF) is a major health concern worldwide. In spite of the close anatomical proximity of maxillofacial bones to the cranium, the association of THI with MFF is controversial. The aim of this study was to assess the association between traumatic head injuries (THI) and maxillofacial fractures (MFF). Other factors associated with THI in patients with MFF were also investigated MATERIALS AND METHODS: A hospital-based retrospective study was conducted at the OMFS Unit, Hospital USM, Kelantan, Malaysia...
May 15, 2017: Dental Traumatology: Official Publication of International Association for Dental Traumatology
https://www.readbyqxmd.com/read/28495608/short-term-caloric-restriction-exerts-neuroprotective-effects-following-mild-traumatic-brain-injury-by-promoting-autophagy-and-inhibiting-astrocyte-activation
#9
Yuan Liu, Rong Wang, Zhiwei Zhao, Wen Dong, Xu Zhang, Xi Chen, Lina Ma
Cognitive deficits may occur after mild traumatic brain injury (mTBI), but effective treatment modalities are presently unavailable. Caloric restriction (CR) has beneficial effects on neurodegenerative diseases and brain injury. However, the underlying mechanisms have not yet been clearly defined. Therefore, the aim of the present study was to investigate the short-term effects of CR treatment on cognitive function in mice after mTBI. Forty-five 12-week-old C57/BL6 mice were subjected to closed-head mTBI using a weight drop device...
May 8, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28477150/the-optimal-angle-of-the-mediolateral-episiotomy-at-crowning-of-the-head-during-labor
#10
Shimon Ginath, Osnat Elyashiv, Eran Weiner, Ron Sagiv, Jacob Bar, Joseph Menczer, Michal Kovo, Alexander Condrea
INTRODUCTION AND HYPOTHESIS: The aim of the mediolateral episiotomy incision is to increase the diameter of the soft tissue of the vaginal outlet to facilitate birth and to prevent vaginal tears. Episiotomy angles that are too narrow and close to the midline increase the risk of obstetric anal sphincter injuries. In order to determine the optimal angle of the episiotomy, we assessed the changes in the angles of episiotomy lines marked during the first stage of labor and measured at the time of crowning of the head...
May 5, 2017: International Urogynecology Journal
https://www.readbyqxmd.com/read/28461271/the-protective-effect-of-omeprazole-against-traumatic-brain-injury-an-experimental-study
#11
Rafet Özay, Mehmet Erhan Türkoğlu, Bora Gürer, Habibullah Dolgun, Oya Evirgen, Berrin İmge Ergüder, Nazlı Hayırlı, Levent Gürses, Zeki Şekerci
BACKGROUND: The development of secondary brain injury via oxidative stress after traumatic brain injury (TBI) is a well known entity. Consequently, the aim of the present study was to evaluate the role of omeprazole (OM) on rat model of TBI. METHODS: A total of 24 male rats were used and divided into four groups as follows; control, trauma, OM, and methylprednisolone (MP). The trauma, OM and MP groups were subjected to closed-head contusive weight-drop injuries...
April 28, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28437717/traumatic-axonal-injury-a-clinical-pathological-correlation
#12
N Davceva, A Sivevski, Neli Basheska
Traumatic axonal injury (TAI) is a distinct clinicopathological entity that can cause serious impairment of the brain function and can sometimes be found as a concrete cause of death. It has been discussed from the perspective of its biomechanical importance, and also from the standpoint of certain criteria for the pathological diagnosis of TAI. However, since the time when DAI (diffuse axonal injury) was initially described, there have been few, if any, discussions about the clinical-pathological correlation in TAI...
April 14, 2017: Journal of Forensic and Legal Medicine
https://www.readbyqxmd.com/read/28435580/first-and-second-metatarsophalangeal-joint-open-dislocations-a-case-report
#13
A Sharma, R Dosajh, G S Bedi, K Gupta, A Jain
Dislocation of multiple metatarsophalangeal joint is an uncommon injury. The mechanism of injury is a high energy force distal to proximal with foot in hyperextension at the metatarsophalangeal (MTP) joint. The acute hyperextension of the toe at the moment of injury causes avulsion of the plantar part of the capsule from the junction of head and neck of the metatarsal. If the collateral ligaments remain intact, they maintain the locked fibrocartilaginous plate over the dorsum of the head of the metatarsal, making closed reduction impossible...
March 2017: Malaysian Orthopaedic Journal
https://www.readbyqxmd.com/read/28429734/neuroprotective-pentapeptide-cn-105-is-associated-with-reduced-sterile-inflammation-and-improved-functional-outcomes-in-a-traumatic-brain-injury-murine-model
#14
Daniel T Laskowitz, Haichen Wang, Tony Chen, David T Lubkin, Viviana Cantillana, Tian Ming Tu, Dawn Kernagis, Guanen Zhou, Gary Macy, Bradley J Kolls, Hana N Dawson
At present, there are no proven pharmacological treatments demonstrated to improve long term functional outcomes following traumatic brain injury(TBI). In the setting of non-penetrating TBI, sterile brain inflammatory responses are associated with the development of cerebral edema, intracranial hypertension, and secondary neuronal injury. There is increasing evidence that endogenous apolipoprotein E(apoE) modifies the neuroinflammatory response through its role in downregulating glial activation, however, the intact apoE holoprotein does not cross the blood-brain barrier due to its size...
April 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28424128/analysis-of-all-terrain-vehicle-trauma-data-implications-for-increased-regulation-and-injury-prevention
#15
COMPARATIVE STUDY
Cathy V Ho, James R Dunne, Wesley R Stroud, Alvaro H Fonseca, Frank E Davis, William J Bromberg
To determine the incidence and severity of all-terrain vehicle crashes (ATVCs) compared with motorcycle crashes (MCCs) in all critically injured patients. Prospective data were retrospectively reviewed on 1840 patients involved in ATVCs and MCCs admitted to a rural level one trauma center over 16 years. ATVC patients (n = 655) were younger (25 vs 38, P < 0.0001), more likely female (20% vs 11%, P < 0.001), less severely injured (13.5 vs 16, P < 0.0001), had similar Glasgow Coma Score (13.3 vs 13.4, p = NS), less helmet use (6% vs 69%, P < 0...
April 1, 2017: American Surgeon
https://www.readbyqxmd.com/read/28420443/tau-phosphorylation-induced-by-severe-closed-head-traumatic-brain-injury-is-linked-to-the-cellular-prion-protein
#16
Richard Rubenstein, Binggong Chang, Natalia Grinkina, Eleanor Drummond, Peter Davies, Meir Ruditzky, Deep Sharma, Kevin Wang, Thomas Wisniewski
Studies in vivo and in vitro have suggested that the mechanism underlying Alzheimer's disease (AD) neuropathogenesis is initiated by an interaction between the cellular prion protein (PrP(C)) and amyloid-β oligomers (Aβo). This PrP(C)-Aβo complex activates Fyn kinase which, in turn, hyperphosphorylates tau (P-Tau) resulting in synaptic dysfunction, neuronal loss and cognitive deficits. AD transgenic mice lacking PrP(C) accumulate Aβ, but show normal survival and no loss of spatial learning and memory suggesting that PrP(C) functions downstream of Aβo production but upstream of intracellular toxicity within neurons...
April 18, 2017: Acta Neuropathologica Communications
https://www.readbyqxmd.com/read/28417146/repeated-mild-traumatic-brain-injury-in-female-rats-increases-lipid-peroxidation-in-neurons
#17
Nathanael J Yates, Stephen Lydiard, Brooke Fehily, Gillian Weir, Aaron Chin, Carole A Bartlett, Jacqueline Alderson, Melinda Fitzgerald
Negative outcomes of mild traumatic brain injury (mTBI) can be exacerbated by repeated insult. Animal models of repeated closed-head mTBI provide the opportunity to define acute pathological mechanisms as the number of mTBI increases. Furthermore, little is known about the effects of mTBI impact site, and how this may affect brain function. We use a closed head, weight drop model of mTBI that allows head movement following impact, in adult female rats to determine the role of the number and location of mTBI on brain pathology and behaviour...
April 17, 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/28403661/pediatric-cheerleading-injuries-treated-in-emergency-departments-in-the-united-states
#18
Nada Naiyer, Thiphalak Chounthirath, Gary A Smith
This study investigates the epidemiology of cheerleading injuries to children in the United States. Data were analyzed from the National Electronic Injury Surveillance System for children 5 through 18 years of age treated in US emergency departments for cheerleading injuries from 1990 through 2012. An estimated 497 095 children ages 5 to 18 years were treated in US emergency departments for a cheerleading injury during the 23-year study period, averaging 21 613 injured children per year. From 1990 to 2012, the annual cheerleading injury rate increased significantly by 189...
April 1, 2017: Clinical Pediatrics
https://www.readbyqxmd.com/read/28384945/excision-versus-fixation-of-the-radial-head-a-comparative-study-of-the-functional-outcomes-of-the-two-techniques
#19
Sanath Kumar Shetty, Ashwin Shetty, Bijith Balan, Arjun Ballal, H Ravindranath Rai, Anoop Hegde
INTRODUCTION: The management of displaced and comminuted radial head fractures has been a matter of debate amongst surgeons for many years. Radial head excision formed the mainstay of surgical management of these injuries. Over the years, there have been improvements in the surgical techniques and availability of better implants and instrumentation techniques, hence, open reduction and internal fixation of these fractures is gaining popularity. AIM: To compare the outcome of elbow function between radial head excision and open reduction and internal fixation of the radial head with mini screws of Mason Type II and Type III radial head fractures and to assess the complications that occur in both techniques...
February 2017: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/28383046/systemic-administration-of-induced-neural-stem-cells-regulates-complement-activation-in-mouse-closed-head-injury-models
#20
Mou Gao, Qin Dong, Hui Yao, Yingzhou Lu, Xinchao Ji, Mingming Zou, Zhijun Yang, Minhui Xu, Ruxiang Xu
Complement activation plays important roles in the pathogenesis of central nervous system (CNS) diseases. Patients face neurological disorders due to the development of complement activation, which contributes to cell apoptosis, brain edema, blood-brain barrier dysfunction and inflammatory infiltration. We previously reported that induced neural stem cells (iNSCs) can promote neurological functional recovery in closed head injury (CHI) animals. Remarkably, we discovered that local iNSC grafts have the potential to modulate CNS inflammation post-CHI...
April 6, 2017: Scientific Reports
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