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 56 for “"head impact"”.
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Optimal Head Impact Signal Processing and the Description and Perception of Head Impact Exposure in Female Adolescent Ice Hockey Players
Concussion and repetitive head impact exposure are significant media, clinical, and research topics. Long-term symptomatic outcomes of sub-injurious head impact exposure have become a topic of concern for professional and youth contact sport athletes alike. Vulnerable populations such as females …
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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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Head Impact Biomechanics and Helmet Performance in Youth Football
… in this thesis aims to improve the knowledge of head impact biomechanics in youth football players by analyzing head impact exposure of youth football players and the performance of youth football helmets. The results of the studies presented provide a foundation for researchers, football …
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Head impact characterization of generic A-pillar of an automobile
… to provide enhanced occupant protection for all impact conditions experienced in automobile crashes poses a great challenge. Several safety features such as seatbelts and airbags have been developed to reduce occupant injuries in the event of a crash. However, new studies have indicated that even …
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Head-Impact-Related Outcomes by Position in Retired NFL Football Players
This study examined how repeated head-impact-related traumatic brain injury experienced by retired NFL players impacts their neuropsychological functioning, as well as whether player position was a significant factor in the impairment experienced. Participants (N=142) were selected from an archival …
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Evaluation of Head Impact Exposure and Concussion Injury Mechanisms in Youth Football
… effects from repetitive subconcussive (i.e. impacts that occur during regular participation in football and do not result in the signs or symptoms of a concussion) and concussive impacts. Studies have provided evidence suggesting that later-life neurodegenerative disease may result from …
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Investigation of Small Remotely Piloted Aircraft System (sRPAS) to Human Head Impact
… piloted aircraft system (sRPAS) to ground human head impact could cause injuries to the public. Skull fractures and brain injuries have been observed in sRPAS-related impacts, which varied in angles, locations and velocities. This study developed a representative quadcopter sRPAS finite element …
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The effect of repetitive head impact exposure on white matter lesion volume
… (CCS) expose athletes to countless repetitive head impacts (RHI) across a single season, potentially leading to increased risk of long-term difficulties in cognition and the development of neurodegenerative disease. There is mixed literature on whether RHI from CCS result in changes to white …
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Sex-Specific Head Impact Exposure in Rugby: Measurement Considerations and Relationships to Clinical Outcomes
… concussion can be from a single, high severity impact 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 …
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Development and Implementation of Laboratory Test Methods for the Evaluation of Wearable Head Impact Sensors
… sensor technology and the desire to investigate head impacts in previously unstudied groups, wearable head impact sensors have reached nation-wide popularity for their promising benefits to consumers and researchers. However, there are risks in relying on such technology before proper validation …
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SUBCONCUSSIVE HEAD IMPACT EFFECT ON PLASMA EXPRESSION OF S100-BETA AND PINCH PROTEINS IN COLLEGIATE FOOTBALL PLAYERS
… longer-term effects of repetitive subconcussive impacts on plasma S100β and PINCH levels and concussion-related symptom score were examined. The first aim was to investigate the acute repetitive subconcussive impact effect by comparing the biomarker levels at pre and post full-gear practice, …
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The Relationship Between Axonal Injury, Biomarker Expression And Mechanical Response In A Rodent Head Impact Acceleration Model
… accounts for 40-50% of hospitalizations due to head injury and one third of the mortality due to TBI, and it is difficult to diagnose and evaluate. The purpose of this dissertation is to determine mechanical injury predictors for TAI and identify potential biomarkers to evaluate TAI.</p> <p>In …
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Cognitive and emotional effects of one season of head impact exposure in high school contact sport athletes
… last decade, studies of subconcussive repetitive head impacts (RHI) in contact sports have found associations with functional and structural brain changes, even in the absence of diagnosed concussion. Risk and thresholds for brain dysfunction in the setting of sports-related RHI remain poorly …
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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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SEX DIFFERENCES IN HEAD IMPACT BIOMECHANICS AND QUANTITATIVE FUNCTIONAL DEFICITS DUE TO REPETITIVE LOADING IN HIGH SCHOOL SPORTS
… are understudied with only 20% of concussion and head kinematic sensor studies including female athletes. There is growing concern for the neurological outcomes associated with repetitive head loading in contact sports. In this dissertation, the effects of repeated head loading were investigated …
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Finite Element Analysis of a Golf Ball and Driver Head Impact: Understanding the Feasibility of an Acoustical Optimization
An acoustic profile from the impact between a golf ball and driver head was produced using FEA. Following this, the results were analyzed to determine the feasibility of an acoustical optimization of such an impact. A validation of the FEA program LS-DYNA® was undertaken to ensure a proper solution …
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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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An Investigation Of The Relationship Between Axonal Injury, Biomarker Expression And Mechanical Response In A Rodent Head Impact Acceleration Model
… accounts for 40-50% of hospitalizations due to head injury and one third of the mortality due to TBI, and it is difficult to diagnose and evaluate. The purpose of this dissertation is to determine mechanical injury predictors for TAI and identify potential biomarkers to evaluate TAI.</p> <p>In …
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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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