Journal ArticleAnnals of biomedical engineering · October 2021
The Guardian Cap NXT (GC NXT) and the ProTech Helmet Cap (ProTech) are commercially available aftermarket products designed to augment the energy attenuation characteristics of American football helmets. The ability of these helmet shell add-on products to ...
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Journal ArticleAnnals of biomedical engineering · November 2020
This paper reports the development of a test device for replicating unique features of concussion-causing helmet-to-ground impacts. Helmet-to-ground impacts are characterized by an oblique impact velocity vector, preimpact rotational motion of the helmeted ...
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Journal ArticleAnnals of biomedical engineering · November 2020
As more is learned about injury mechanisms of concussion and scenarios under which injuries are sustained in football games, methods used to evaluate protective equipment must adapt. A combination of video review, videogrammetry, and laboratory reconstruct ...
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Journal ArticleAnnals of biomedical engineering · November 2020
The relationship between laboratory and on-field performance of football helmets was assessed for 31 football helmet models selected from those worn by players in the 2015-2019 National Football League (NFL) seasons. Linear impactor tests were conducted wi ...
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Journal ArticleAnnals of biomedical engineering · November 2020
Seventeen concussive helmet-to-helmet impacts occurring in National Football League (NFL) games were analyzed using video footage and reconstructed by launching helmeted crash test dummies into each other in a laboratory. Helmet motion on-field and in the ...
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Journal ArticleAnnals of biomedical engineering · November 2020
Consideration of position-specific features of the NFL concussion environment could enable improved risk mitigation through the design of position-specific helmets to improve self-protection as well as protection for the other player with whom the contact ...
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Journal ArticleJournal of biomechanics · January 2020
This paper presents a detailed characterization of helmet-to-ground impacts in the National Football League. Video analysis was performed for 16 head-to-ground impacts that caused concussions. Average resultant closing velocity was 8.3Â m/s at an angle near ...
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Journal ArticleJournal of biomechanics · August 2019
The study of pediatric head injury relies heavily on the use of finite element models and child anthropomorphic test devices (ATDs). However, these tools, in the context of pediatric head injury, have yet to be validated due to a paucity of pediatric head ...
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Journal ArticleClinical biomechanics (Bristol, Avon) · April 2019
BackgroundCervical bilateral facet dislocations are among the most devastating spine injuries in terms of likelihood of severe neurological sequelae. More than half of patients with tetraparesis had sustained some form of bilateral facet fracture ...
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Journal ArticleThe American journal of sports medicine · December 2018
BackgroundConcussions in American football remain a high priority of sports injury prevention programs. Detailed video review provides important information on causation, the outcomes of rule changes, and guidance on future injury prevention strat ...
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Chapter · January 1, 2018
For health care industry technologies, grants and other nondilutive funding sources are useful to fuel initial translational efforts, but rapid, significant product advancement typically requires larger infusions of capital. One source of such funding is V ...
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Journal ArticleJournal of biomechanics · November 2015
Head injury is a persistent and costly problem for both children and adults. Globally, approximately 10 million people are hospitalized each year for head injuries. Knowing the structural properties of the head is important for modeling the response of the ...
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Journal ArticleAnnals of biomedical engineering · September 2015
The morphological and mechanical properties of the pediatric skull are important in understanding pediatric head injury biomechanics. Although previous studies have analyzed the morphology of cranial sutures, none has done so in pediatric specimens nor hav ...
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Book · January 1, 2015
This chapter summarizes the research on the biomechanical responses of the neck in a form that will be useful in design of protective systems and in the development of societal strategies to reduce the number of cervical spine injuries. Neck injuries are d ...
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Journal ArticleAccident; analysis and prevention · November 2014
Given the high incidence of TBI, head injury has been studied extensively using both cadavers and anthropomorphic test devices (ATDs). However, few studies have benchmarked the response of ATD heads against human data. Hence, the objective of this study is ...
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Conference11th World Congress on Computational Mechanics, WCCM 2014, 5th European Conference on Computational Mechanics, ECCM 2014 and 6th European Conference on Computational Fluid Dynamics, ECFD 2014 · July 1, 2014
For inertial loading in frontal impacts, the effects of the neck muscles are profound, and impact the accuracy of computational and physical surrogates. Previous studies have shown two important aspects of muscle modeling in adult computational models are ...
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Journal ArticleTraffic injury prevention · January 2014
ObjectiveTraumatic brain injury (TBI) is a major public health issue, affecting millions of people annually. Anthropomorphic test devices (ATDs) and finite element models (FEMs) provide a means of understanding factors leading to TBI, potentially ...
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Journal ArticleTraffic injury prevention · January 2014
ObjectiveTraumatic injuries are the leading cause of death of children aged 1-19 in the United States and are principally caused by motor vehicle collisions, with the head being the primary region injured. The neck, though not commonly injured, go ...
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Journal ArticleInjury prevention : journal of the International Society for Child and Adolescent Injury Prevention · February 2013
BackgroundClinical studies increasingly report brain injury and not pulmonary injury following blast exposures, despite the increased frequency of exposure to explosive devices. The goal of this study was to determine the effect of personal body a ...
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Journal ArticleSpine · January 2013
Study designBiomechanical tensile testing of perinatal, neonatal, and pediatric cadaveric cervical spines to failure.ObjectiveTo assess the tensile failure properties of the cervical spine from birth to adulthood.Summary of background ...
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Journal ArticleComputer methods in biomechanics and biomedical engineering · January 2013
Finite element (FE) modelling is a popular tool for studying human body response to blast exposure. However, blast modelling is a complex problem owing to more numerous fluid-structure interactions (FSIs) and the high-frequency loading that accompanies bla ...
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Journal ArticleTraffic injury prevention · January 2013
ObjectiveDuring dynamic injury scenarios, such as motor vehicle crashes, neck biomechanics contribute to head excursion and acceleration, influencing head injuries. One important tool in understanding head and neck dynamics is computational modeli ...
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Conference2012 IRCOBI Conference Proceedings - International Research Council on the Biomechanics of Injury · October 29, 2012
Traumatic brain injury (TBI) causes 1.1 million trips to the hospital each year in the US, with 235,000 of these injuries requiring admissions. Given the importance of TBI, head injury has been studied extensively using both cadavers and anthropomorphic te ...
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Journal ArticleJournal of biomechanics · October 2012
Traumatic Brain Injury (TBI) is a leading cause of mortality and morbidity for children in the United States. The unavailability of pediatric cadavers makes it difficult to study and characterize the mechanical behavior of the pediatric skull. Computer bas ...
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Journal ArticleAnnals of biomedical engineering · July 2012
Blast-related traumatic brain injury is the most prevalent injury for combat personnel seen in the current conflicts in Iraq and Afghanistan, yet as a research community,we still do not fully understand the detailed etiology and pathology of this injury. F ...
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Journal ArticleForensic Sci Int · January 10, 2012
Radiologic imaging is crucial in the diagnosis of skull fracture, but there is some doubt as to whether different imaging modalities can accurately identify fractures present on a human skull. While studies have been performed to evaluate the efficacy of r ...
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Chapter · January 1, 2012
Musculoskeletal mechanics occur over many length scales, from macroscopic muscle extension and weight-bearing bone compression to microscopic muscle bers, down to the cytoskeleton that supports the bone cell structure and facilitates muscle cell contractio ...
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ConferenceSAE Technical Papers · November 3, 2010
Child head trauma in the United States is responsible for 30% of all childhood injury deaths with costs estimated at $10 billion per year. The common tools for studying this problem are the child anthropomorphic test devices (ATDs). The headform sizes and ...
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Journal ArticleStapp Car Crash J · November 2010
Child head trauma in the United States is responsible for 30% of all childhood injury deaths with costs estimated at $10 billion per year. The common tools for studying this problem are the child anthropomorphic test devices (ATDs). The headform sizes and ...
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Journal ArticleSAE Technical Papers · January 1, 2010
The biofidelity of the Hybrid III headform in impact is largely dependent on local head geometry and viscoelastic mechanical properties of its polymer skin. Accordingly, for accurate simulation of the ATD headform in computational models, a quantitative un ...
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Journal ArticleInternational Research Council on the Biomechanics of Injury - 2009 International IRCOBI Conference on the Biomechanics of Injury, Proceedings · December 1, 2009
The objective of this study was to compare the coupling of ear-mounted accelerometers with the head during moderate rate and high rate impacts. Impact tests were performed on PMHS equipped with ear-mounted accelerometers and head-mounted accelerometers usi ...
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Journal ArticleJ Biomech Eng · August 2009
Tensile loading of the human cervical spine results from noncontact inertial loading of the head as well as mandibular and craniofacial impacts. Current vehicle safety standards include a neck injury criterion based on beam theory that uses a linear combin ...
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ConferenceSAE Technical Papers · November 3, 2008
Pediatric cervical spine biomechanics have been under-researched due to the limited availability of pediatric post-mortem human subjects (PMHS). Scaled data based on human adult and juvenile animal studies have been utilized to augment the limited pediatri ...
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Journal ArticleStapp car crash journal · November 2008
Pediatric cervical spine biomechanics have been under-researched due to the limited availability of pediatric post-mortem human subjects (PMHS). Scaled data based on human adult and juvenile animal studies have been utilized to augment the limited pediatri ...
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Journal ArticleTraffic Inj Prev · October 2008
OBJECTIVE: Reducing surface friction has been shown to reduce head injury risk in some scenarios. However, rigid body mechanics suggests that other scenarios may exist in which reducing surface friction increases head injury risk. The goal of this study is ...
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Journal ArticleSpine · July 2008
Study designIn vitro experiments using cadaveric cervical spine motion segments to quantify facet capsular ligament strain during whiplash-like loading.ObjectiveTo quantify facet capsule strains during whiplash-like loading with an axial ...
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Journal ArticleJournal of biomechanics · January 2007
The center of rotation (COR) of the upper cervical spine (UCS) is an important biomechanical landmark that is used to determine upper neck moment, particularly when evaluating injury risk in the automotive environment. However, neither the location of the ...
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Journal ArticleJournal of biomechanics · January 2007
New vehicle safety standards are designed to limit the amount of neck tension and extension seen by out-of-position motor vehicle occupants during airbag deployments. The criteria used to assess airbag injury risk are currently based on volunteer data and ...
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ConferenceSAE Technical Papers · November 6, 2006
This study evaluated the biofidelity of both the Hybrid III and the THOR-NT anthropomorphic test device (ATD) necks in quasistatic tension-bending and pure-bending by comparing the responses of both the ATDs with results from validated computational models ...
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ConferenceSAE Technical Papers · November 1, 2004
The aim of this study was to describe and explain the variation of neck muscle strength along the cervical spine. A three-dimensional model of the head-neck complex was developed to test the hypothesis that the moment-generating capacity of the neck muscul ...
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Journal ArticleStapp car crash journal · November 2004
The adult head has been studied extensively and computationally modeled for impact, however there have been few studies that attempt to quantify the mechanical properties of the pediatric skull. Likewise, little documentation of pediatric anthropometry exi ...
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Journal ArticleAccident; analysis and prevention · July 2004
The determination of the optimum seatback characteristics for the mitigation of serious and catastrophic neck injury during high-speed rear-end collisions remains a topic of continued investigation. Despite a number of prior research efforts, both field da ...
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Journal ArticleTraffic injury prevention · June 2004
There is little data available on the responses of the human cervical spine to tensile loading. Such tests are mechanistically and technically challenging due to the variety of end conditions that need to be imposed and the difficulty of strong specimen fi ...
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Journal ArticleAccident; analysis and prevention · January 2004
ContextMotor vehicle (MV)-related injury is a leading cause of death and emergency department visits in the US. Information has been limited regarding the magnitude and types of injuries suffered by the survivors of MV crashes.ObjectiveTo ...
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Journal ArticleStapp car crash journal · October 2003
Unlike other modes of loading, the tolerance of the human neck in tension depends heavily on the load bearing capabilities of the muscles of the neck. Because of limitations in animal models, human cadaver, and volunteer studies, computational modeling of ...
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Journal ArticleJournal of biomechanics · April 2003
To examine whether habituation confounds the study of whiplash injury using human subjects, we quantified changes in the magnitude and temporal development of the neck muscle electromyogram and peak linear and angular head/torso kinematics of subjects expo ...
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Journal ArticleSpine · April 2003
Study designHuman subjects were exposed experimentally to a single whiplash-like perturbation.ObjectiveTo determine how awareness of the presence and timing of a whiplash-like perturbation affects the onset and amplitude of the neck muscl ...
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Journal ArticleJ Spinal Disord Tech · February 2003
Among patients with vertebral metastases, the identification of candidates for surgical stabilization has a limited basis in evidence. We retrospectively studied patterns of tumor spread (n = 756 vertebrae) and predictors of fracture and epidural impingeme ...
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Journal ArticleJournal of biomechanical engineering · October 2002
The flexibility matrix currently forms the basis for multibody dynamics models of cervical spine motion. While studies have aimed to determine cervical motion segment behavior, their accuracy and utility have been limited by both experimental and analytica ...
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Journal ArticleJ Biomech · June 2002
The purpose of this study is to test the hypothesis that the upper cervical spine is weaker than the lower cervical spine in pure flexion and extension bending, which may explain the propensity for upper cervical spine injuries in airbag deployments. An ad ...
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Journal ArticleJ Biomech Eng · October 2001
A validated computational head-neck model was used to understand the mechanical relationships between surface padding characteristics and injury risk during impacts near the head vertex. The study demonstrated that injury risk can be decreased by maximizin ...
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Journal ArticleSpine · October 2001
Study designA comparison of cervical facet capsule strain fields in cadaveric motion segments exposed to whiplash-like loads and failure loads.ObjectivesTo compare the maximum principal strain in the facet capsular ligament under combined ...
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Journal ArticleJ Anat · April 2001
Facet capsule injury has been hypothesised as a mechanism for neck pain. While qualitative studies have demonstrated the proximity of neck muscles to the cervical facet capsule, the magnitude of their forces remains unknown owing to a lack of quantitative ...
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Journal ArticleJournal of Anatomy · 2001
Facet capsule injury has been hypothesised as a mechanism for neck pain. While qualitative studies have demonstrated the proximity of neck muscles to the cervical facet capsule, the magnitude of their forces remains unknown owing to a lack of quantitative ...
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Journal ArticleSpine (Phila Pa 1976) · November 15, 2000
STUDY DESIGN: A rabbit model was used to compare clinical outcome, radiographic changes, and biomechanical flexibility after cervical laminectomy and open-door laminoplasty. OBJECTIVE: This study tested the hypothesis that radiographic changes and biomecha ...
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ConferenceSAE Technical Papers · November 1, 2000
The cervical facet capsular ligaments are thought to be an important anatomical site of whiplash injury, although the mechanism by which these structures may be injured during whiplash remains unclear. The purpose of this study was to quantify the interver ...
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Journal ArticleStapp car crash journal · November 2000
Cervical spine behavior for generalized loading is often characterized using a full three-dimensional flexibility matrix. While experimental studies have been aimed at determining cervical motion segment behavior, their accuracy and utility have been limit ...
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Journal ArticleSpine (Phila Pa 1976) · May 15, 2000
STUDY DESIGN: Cervical facet capsular strains were determined during bending and at failure in the human cadaver. OBJECTIVE: To determine the effect of an axial pretorque on facet capsular strains and estimate the risk for subcatastrophic capsular injury d ...
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Journal ArticleJ Spinal Disord · April 2000
This study determined the ability of an upper extremity Tarlov scale, a lower extremity Tarlov scale, and the Durham scale to predict the development of myelopathy and the likelihood of survival in a rabbit model of surgical treatments for cervical spondyl ...
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Journal ArticleJournal of biomechanical engineering · February 2000
Investigators currently lack the data necessary to define the state of skeletal muscle properties within cadaveric specimens. The purpose of this study is to define the temporal changes in the postmortem properties of skeletal muscle as a function of mecha ...
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Journal ArticleJ Biomech · February 2000
Cervical spine injuries continue to be a costly societal problem. Future advancements in injury prevention depend on improved physical and computational models which, in turn, are predicated on a better understanding of the responses of the neck during dyn ...
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Journal ArticleStapp Car Crash Conference Proceedings · December 1, 1999
Epidemiological and clinical studies have identified the cervical facet capsule as a potential site of whiplash injury and prerotation of the head and neck as a risk factor for whiplash injury. However, biomechanical data related to the cervical facet caps ...
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Journal ArticleAmerican Society of Mechanical Engineers, Bioengineering Division (Publication) BED · December 1, 1999
In this study, an attempt was made to characterize the full field facet capsular ligament strains during pure bending moments in the sagittal plane and in the presence of a pretorque. Measurements of capsular strains at failure were compared to the strains ...
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Journal ArticleJ Biomech · March 1999
A computational head-neck model was developed to test the hypothesis that increases in friction between the head and impact surface will increase head and neck injury risk during near-axial impact. The model consisted of rigid vertebrae interconnected by a ...
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Journal ArticleJournal of biomechanical engineering · February 1998
The passive and stimulated engineering stress-large strain mechanical properties of skeletal muscle were measured at the midbelly of the rabbit tibialis anterior. The purpose of these experiments was to provide previously unavailable constitutive informati ...
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Journal ArticleSAE Technical Papers · January 1, 1998
Investigators currently lack the data necessary to define the state of skeletal muscle properties within the cadaver. The purpose of this study is to define the temporal changes in the postmortem properties of skeletal muscle as a function of mechanical lo ...
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Journal ArticleAmerican Society of Mechanical Engineers, Applied Mechanics Division, AMD · December 1, 1997
A computational head-neck model was developed to better understand the influence of head motion and cervical spine buckling on dynamic responses to near-vertex head impact. The model consisted of rigid vertebrae interconnected by assemblies of nonlinear sp ...
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Journal ArticleStapp Car Crash Conference Proceedings · November 1, 1997
A computational head-neck model was developed to more efficiently study dynamic responses of the head and neck to near-vertex head impact. The model consisted of rigid vertebrae interconnected by assemblies of nonlinear springs and dashpots, and a finite e ...
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Journal ArticleSpine (Phila Pa 1976) · October 15, 1997
STUDY DESIGN: This is an in vitro study comparing cervical spine injuries produced in rigid head impacts and in padded head impacts. OBJECTIVES: To test the hypothesis that deformable impact surfaces pose a greater risk for cervical spine injury than rigid ...
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Journal ArticleJournal of biomechanics · October 1997
An automated method has been developed to generate finite element meshes of geometrically complex structures from CT images using solely hexahedral elements. This technique improves upon previous voxel-based mesh reconstruction approaches by smoothing the ...
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Journal ArticleMedicine and science in sports and exercise · July 1997
Most catastrophic cervical spinal injuries occur as a result of head impacts in which the head stops and the neck is forced to stop the moving torso. In these situations the neck is sufficiently fragile that injuries have been reported at velocities as low ...
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Journal ArticleMedicine and Science in Sports and Exercise · July 1, 1997
Most catastrophic cervical spinal injuries occur as a result of head impacts in which the head stops and the neck is forced to stop the moving torso. In these situations the neck is sufficiently fragile that injuries have been reported at velocities as low ...
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Journal ArticleSpine (Phila Pa 1976) · June 1, 1997
STUDY DESIGN: A paired comparison was done of the bending flexibility and compression strength of tricortical bone graft and titanium fiber mesh implants in a human cadaver model of posterior lumbar interbody fusion. OBJECTIVES: To test the hypothesis that ...
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ConferenceASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE) · January 1, 1997
The importance of buckling during compressive loading of the cervical spine was suggested by Torg (1985) and has been subsequently demonstrated both quasi-statically2 and dynamically3. The complex deformations resulting from first and second order cervical ...
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ConferenceASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE) · January 1, 1997
A computational head-neck model was developed to better understand the influence of head motion and cervical spine buckling on dynamic responses to near-vertex head impact. The model consisted of rigid vertebrae interconnected by assemblies of nonlinear sp ...
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Journal ArticleSAE Technical Papers · January 1, 1997
This study explores the dynamics of head and cervical spine impact with the specific goals of determining the effects of head inertia and impact surface on injury risk. Head impact experiments were performed using unembalmed head and neck specimens from 22 ...
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Journal ArticleSAE Technical Papers · January 1, 1997
A computational head-neck model was developed to more efficiently study dynamic responses of the head and neck to near-vertex head impact. The model consisted of rigid vertebrae interconnected by assemblies of nonlinear springs and dashpots, and a finite e ...
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Journal ArticleSAE Technical Papers · 1997
This study explores the dynamics of head and cervical spine impact with the specific goals of determining the effects of head inertia and impact surface on injury risk. Head impact experiments were performed using unembalmed head and neck specimens from 22 ...
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Journal ArticleJournal of biomechanics · December 1996
Rising from a chair is a task essential for independent living. Many elderly persons have difficult with this task. Previous studies have drawn conflicting conclusions as to the role of strength in limiting the ability to rise from a chair. The purpose of ...
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Journal ArticleSpine (Phila Pa 1976) · September 1, 1996
STUDY DESIGN: This study determined the predictive ability of quantitative computed tomography, dual energy x-ray absorptiometry, pedicular geometry, and mechanical testing in assessing the strength of pedicle screw fixation in an in vitro mechanical test ...
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Journal ArticleJ Bone Joint Surg Am · March 1996
The purpose of this study was to analyze, with use of an impact model, the relationships among motion of the head, local deformations of the cervical spine, and the mechanisms of injury; the model consisted of the head and neck of a cadaver. Traditionally, ...
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Journal ArticleJ Biomech · March 1996
This study explores the inertial effects of the head and torso on cervical spine dynamics with the specific goal of determining whether the head mass can provide a constraining cervical spine end condition. The hypothesis was tested using a low friction im ...
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Journal ArticleStapp Car Crash Conference Proceedings · November 1, 1995
The absence of data on the material properties of skeletal muscle has resulted in limitations in the utility of human surrogates in evaluating injury potential during head and neck impact. The purpose of this paper is two fold. First, a quasi-linear viscoe ...
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Journal ArticleJournal of biomechanical engineering · August 1995
A noncontact optical system using high speed image analysis to measure local tissue deformations and axial strains along skeletal muscle is described. The spatial resolution of the system was 20 pixels/cm and the accuracy was +/- 0.125 mm. In order to mini ...
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Journal ArticleJournal of neurotrauma · August 1995
Basilar skull fractures comprise a broad category of injuries that have been attributed to a variety of causal mechanisms. The objective of this work is to develop an understanding of the biomechanical mechanisms that result in basilar skull fractures, spe ...
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Journal ArticleOrthopedics · February 1995
A rabbit femur cortical window model was developed to study the time-dependent mechanical and radiographic changes with various treatments of surgically created windows. In the present experiment the time-dependent differences in torsional whole bone stren ...
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Journal ArticleSpine (Phila Pa 1976) · January 15, 1995
STUDY DESIGN: This study determined the predictive ability of electrical impedance measurement in detecting cortical perforation in a porcine model of pedicular exploration. OBJECTIVE: This study tested the hypothesis that a large decrease in electrical im ...
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Journal ArticleCritical reviews in biomedical engineering · January 1995
A review of published research is presented to examine human cervical spine injury epidemiology, classification, mechanism, and tolerance. Synthesis of the literature identifies several areas of cervical spine injury biomechanics in which the current under ...
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Journal ArticleSAE Technical Papers · January 1, 1995
The absence of constitutive data on muscle has limited the development of models of cervical spinal dynamics and our understanding of the forces developed in the cervical spine during impact injury. Therefore, the purpose of this study is to characterize t ...
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Journal ArticleStapp Car Crash Conference Proceedings · November 1, 1994
The aim of this work is to develop an understanding of the biomechanical mechanisms that result in basilar skull fractures when the head is subject to a mandibular impact. Two experimental studies have been performed in the characterization of the injury m ...
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Journal ArticleJ Bone Miner Res · May 1994
Clinical and biomechanical investigations indicate that assessment of vertebral body bone mineral density (BMD) by anteroposterior dual-energy x-ray absorptiometry (DXA) is a useful index of vertebral body strength and fracture risk in osteoporosis. Howeve ...
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Journal ArticleJournal of biomechanics · April 1994
The tensile viscoelastic responses of live, innervated rabbit skeletal muscle were measured and characterized using the quasi-linear model of viscoelasticity. The tibialis anterior (TA) and extensor digitorum longus (EDL) muscles of anesthetized New Zealan ...
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Journal ArticleSAE Technical Papers · January 1, 1994
Basilar skull fractures comprise a broad category of injuries that have been attributed to a variety of causal mechanisms including mandibular impacts. The objective of this work is to develop an understanding of the biomechanical mechanisms that result in ...
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Journal ArticleClin Orthop Relat Res · February 1993
Extracorporeal shock-wave lithotripsy has been proposed as a modality to facilitate the removal of bone cement during revision arthroplasty; however, concomitant cortical microfractures have been reported. The current study examines the effect on whole bon ...
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Journal ArticleJ Magn Reson Imaging · 1993
Disruption of spinal ligaments can lead to instability that jeopardizes the spinal cord and nerve roots. Magnetic resonance (MR) imaging can directly image spinal ligaments; however, the sensitivity with which this modality demonstrates ligament injury has ...
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Journal ArticleThe Journal of arthroplasty · December 1992
Ultrasonic driven tools have been developed to facilitate the removal of bone cement during revision arthroplasty. The effect on whole bone strength of cement removal by ultrasonic tools was examined in a canine femur model. Paired, fresh-frozen canine fem ...
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Journal ArticleAmerican Society of Mechanical Engineers, Bioengineering Division (Publication) BED · December 1, 1991
The dynamic torsional responses of the human cadaver cervical spine were measured in vitro. The quasi-linear formulation of time dependent behavior was used to describe these structural responses. The resulting model showed high predictive ability, reachin ...
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Journal ArticleProceedings - Society of Automotive Engineers · December 1, 1991
The passive combined flexion and axial loading responses of the unembalmed human cervical spine were measured in a dynamic test environment. The influence of end condition (the degree of constraint imposed on the head by the contact surface) was varied to ...
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Journal ArticleSpine (Phila Pa 1976) · August 1991
A dynamic servocontrolled torsion machine has been used to characterize cervical injury due to pure rotation of the head. Resultant force moment, torque, and applied rotation have been measured. Torque applied to the base of the skull resulted in injury to ...
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Journal ArticleProceedings - Society of Automotive Engineers · 1991
The passive combined flexion and axial loading responses of the unembalmed human cervical spine were measured in a dynamic test environment. The influence of end condition (the degree of constraint imposed on the head by the contact surface) was varied to ...
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Journal ArticleSAE (Society of Automotive Engineers) Transactions · 1991
The passive combined flexion and axial loading responses of the unembalmed human cervical spine were measured in a dynamic test environment. The influence of end condition (the degree of constraint imposed on the head by the contact surface) was varied to ...
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Journal ArticleJournal of biomechanics · January 1991
The dynamic torsional viscoelastic responses of the human cadaver cervical spine were measured in vitro. The quasi-linear formulation of time dependent behavior was used to describe and predict the resultant torque as a function of applied angular deflecti ...
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Journal ArticleAmerican Society of Mechanical Engineers, Bioengineering Division (Publication) BED · December 1, 1990
The quasi-linear model has been applied to predict the in vitro responses of the human cervical spine in torsion. This model was developed by approximating a true relaxation test with a finite rate ramp and hold. The performance of this model was good, rea ...
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Journal ArticleSAE Technical Papers · January 1, 1989
The passive torsional responses of the human cervical spine were investigated using unembalmed cervical spines in a dynamic test environment. Kinematic constraints were designed to simulate in vivo conditions. A physiologic axis of twist was determined bas ...
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Journal ArticleSAE Technical Papers · January 1, 1988
The lateral, anterior and posterior passive bending responses of the human cervical spine were investigated using unembalmed cervical spinal elements obtained from cadavers. Bending stiffness was measured in six modes ranging from tension-extension through ...
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