Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 42 for “"Head Impacts"”.
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Biomechanics of Head Impacts in Soccer
… rate of concussions in this population. Wearable head impact sensors were evaluated on their ability to accurately count and measure head impacts during a collegiate women's soccer season. Head impact exposure was quantified using video analysis of this season as well. Sensors were unable to …
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Establishing Boundary Conditions for Optimized Reconstruction of Head Impacts
… brain injuries (TBIs) encompass an array of head trauma caused by diverse mechanisms, including falls, vehicular accidents, and sports-related incidents. These injuries vary from concussions to diffuse axonal injuries. TBIs are characterized by the linear and rotational accelerations of the …
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Head Impacts in Hockey and Youth Football: Biomechanical Response and Helmet Padding Characteristics
… in two distinct subcategories of sport related head injury research. The body of work is aimed at increasing the understanding of head impact biomechanics across a broad spectrum of impact scenarios as well as the ability of helmets to affect head impact biomechanics over time. The first study …
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On-Field Measurement of Head Impacts in Youth Football: Characterizing High Magnitude Impacts and Assessing Balance Outcomes
The research presented in this thesis focuses on head impact exposure in youth football. The on-field portion of this research investigated high magnitude head impacts that youth football players experience in games and practices. With previously validated data collection methods, linear and …
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A Comparison of Brain Trauma Characteristics from Head Impacts for Lightweight and Heavyweight Fighters in Professional Mixed Martial Arts
… neurological consequences due to repetitive head trauma. Mass differentials as well as reported differences in fight styles between Lightweight and Heavyweight fighters in MMA may affect head impact kinematics creating different levels of head injury risk. Factors that influence the risk for …
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Development of a Test Method for Evaluating the Ability of Headgear to Reduce Head Kinematics During Rugby Head Impacts
… yet athletes are not required to wear head protection during play. The sport has primarily relied on tackle regulations to mitigate concussion risk and has imposed standards limiting soft-shell headgear's protective capabilities. However, evidence from other contact sports, including …
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The effect of repetitive subconcussive head impacts on observed physiological, biochemical, and functional perturbances in the brain in high school and collegiate football players: a systematic literature review
… the effects of repetitive subconcussive helmeted head impacts (RSHI) in high school and collegiate athletes. We performed a literature review of all English-language medical literature from 2009 to current. Hippocampal volume changes, white matter diffusion changes, neurocognitive and …
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Cognitive, Psychiatric, And Neuropathological Manifestations Of Repetitive Mild Traumatic Brain Injury
… in contact sports that involve repeated head impacts (e.g., football, ice hockey, boxing), often from a very young age, and it is feared that subsequent impacts can synergize with previous ones so that their effects on the brain become magnified. Repetitive mild traumatic brain injury …
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Influence of Head Impact Exposure on Oculomotor Function and Pupillary Light Reflexes in Men and Women Soccer Players
… and concern as deteriorative effects of these impacts have been shown in athletes without a diagnosed concussion. Detecting subconcussions is extremely difficult and there is no standardized method to recognize these injuries. A first step in identifying subconcussion is taking a closer look at …
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Effect of Rule Changes Occurring Between 2003 and 2016 on Head Impact Frequency and Brain Strain Magnitude In North American Professional Ice Hockey
Head impacts can result in various levels of brain trauma, from mild to severe, and often result in long lasting effects on human brain function (McAllister & McCrea, 2017; Sollmann et al., 2018). Over the past two decades alone the National Hockey League (NHL) has made several rule changes to the …
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Analysis of Linear Head Accelerations From Collegiate Football Impacts
… system that measures and records linear head accelerations to analyze head impacts from collegiate football. The Head Impact Telemetry (HIT) System is an in-helmet system with six spring mounted accelerometers and an antenna that transmits data via radio frequency to a sideline receiver …
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Head Impact Conditions and Helmet Performance in Snowsports
… in the U.S. associated with snowsports in 2017, head injury constitutes about 28% and is the main cause of fatality. Studies have found that a combination of rotational and linear velocities is the most mechanistic way to model brain injury, but despite decades of research, the biomechanical …
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Sex-Specific Head Impact Exposure in Rugby: Measurement Considerations and Relationships to Clinical Outcomes
… event or the accumulation of lower severity impacts. Clinical changes that can result from concussion include an elevated symptom presentation and changes in gait, or an individual's walking pattern. It is not well understood if similar deficits result after an accumulation of subconcussive …
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The Effects of Youth Football on the Developing Brain: A Multi-Modal Neuroimaging Study
Football players can experience hundreds of head impacts during a single season without sustaining a mild traumatic brain injury (mTBI). There is a growing concern regarding the association between later-life neurodegenerative disease development and earlier life head injury. This association is …
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Head Impact Exposure in Youth Football: Evaluation of Practice Drills and Age and Weight Based Levels of Play
… understand concussions as well as quantifying head impact exposure sustained by a football athlete, but efforts have been mainly focused on the high school and collegiate population. More research is needed to study head impact exposure in the youth population as it makes up the largest …
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Development, Validation, & Analysis of Tools to Understand the Biomechanical Basis of Exposure to Repetitive Subconcussive Impacts
… but are also exposed to repetitive subconcussive impacts during normal participation in the sport. There has been growing interest in the link between repetitive head impacts and changes in the brain related to neurodegenerative diseases which has motivated additional research to characterize and …
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Identifying High Risk Individuals in Youth Football and Evaluating Tackling Technique
… organizations with few or no rules for limiting head impact exposure in practices or competition. Studies have found potential long-term effects of repetitive head impact exposure from a young age, even in the absence of concussion. The best methods for reducing head impact exposure include a …
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Quantifying Postural Control, Concussion Risk, and Helmet Performance in Youth Football
… for characterization of the biomechanics of head impacts and concussions for this population. A youth concussion risk function was developed using head impact data collected from youth football players with medically diagnosed concussions. The proposed testing standard for youth football …
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DTI, structural network connectivity, and neurocognitive changes associated with subconcussive impacts in youth football players
… about the effects of cumulative repetitive head impacts, or so-called subconcussive head impact exposure. Neuroimaging analyses of youth athletes may allow characterization of potential dose-response changes in white matter due to sports-related cumulative subconcussive head impact exposure, …
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Biomechanics of Injury Events Associated with Diagnosed Concussion in Professional Men's Rugby League
… acute and long-term consequences of repetitive head trauma. Participation in sport increases risk of concussion, particularly contact sports including rugby, hockey and football (Harmon et al., 2013). In rugby league, there are between 8.0-17.5 concussions/1000 player hours, representing roughly …
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