The widespread practice of non-suicidal self-injury suggests that it might no longer be reasonable to frame such behaviours as individual pathologies and highlights the need to understand such acts as sociological phenomena instead. This dissertation therefore explored the core elements of self-injury such as the self, the body, and meanings ascribed to acts of injuring the self/body, in relation to forms of sociation. Focusing on intent and aetiology, this qualitative enquiry used an interpretive mode of explanation, and collected data via indepth face-to-face interviews from a characteristically diverse community sample of fifteen participants. Findings indicated that respondents' aetiologies of self-injury were located in social interactions characterised by abuse, neglect, bullying, and invalidation. Individuals who perceived themselves as worthless and unlovable objects punished themselves, or branded themselves as failures. Paradoxically, sufficient castigation averted the complete annihilation of the existential self. Findings concur with previous studies which reported that, at its deepest level, self-injury is antithetical to suicide. This study also highlighted the body's communicative role in the symbolic expression of traumatic experiences, and emphasised its physiological role in (a) emotion regulation and (b) self-injury's propensity to become addictive. From a sociological perspective, instant emotion regulation via self-injury allowed individuals to avoid social stigma; well managed social performances in turn protected social bonds. Although self-injury constitutes a maladaptive coping mechanism, its reported physiological, psychological and social gains are significant and need to be considered in intervention programmes and policy. This dissertation therefore makes two recommendations: firstly, restorative practices should be reinstituted, particularly in schools; secondly, the growing and alarming trend of copycat behaviours reported in children and young teens needs to be researched further in relation to the mediation, ideation and imitation of self-injurious behaviours.

Concussions are debilitating injuries affecting the short and long-term health of those who suffer from them. While an increased awareness of the injury has helped lead to a better understanding of the importance of better monitoring and treatment protocols, concussive injuries continue to occur at an alarming rate. Current injury risk thresholds exist and are used in the development of better equipment to protect athletes in high impact sports, however much of this data is based on simulations and/or cadaveric and animal model data from falls. Thus, there is a lack of data from concussive injuries resulting from a multitude of injury events within different sports, including collisions, falls and punches. The purpose of this thesis was to use dynamic response characteristics and brain tissue response to compare four different injury events from reconstructions of real life concussive injury events. This research was designed to provide information related to brain trauma characteristics specific to four common concussive brain injury events. Seventy-two (72) injury reconstructions were used in this study involving four injury events; collisions, helmeted falls, unhelmeted falls and punches. The results from the first study revealed that while all injury events produced similar MPS and Von Mises stress values, the injury events produced different peak linear and rotational accelerations. In terms of risk for concussive injury, differences were also found between percent risk for concussion and the specific injury events, questioning the validity of current concussive thresholds’ applicability to across all types of concussive injury events. The second study aimed to characterize each concussive injury event by means of specific kinematic characteristics unique to that particular event. The results showed that dynamic response variables that accounted for the most variance changed dependant on the concussive producing event. The third study compared maximal principle strain and strain fields within the brain by the specific injury event. The results showed that global strain within specific regions of the brain were significantly different between the different injury events. Furthermore, unique strain fields within the cerebrum were found between the four concussive injury events. The three studies in this research program characterize four common concussive injury events found in sport. It aimed to describe the unique dynamic response characteristics for each injury event that may have significant influence on protective equipment development and standards testing. Finally, though the aim of this study was not to correlate location of strains within the brain with onset of concussive symptoms and duration, this study demonstrated that the concussive producing event can have an effect on location of peak strain and strain field within regions of the cerebrum associated with concussive symptoms.

Concussions are a problem in competitive sports with growing concern over the 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 10-15% of all injuries in the sport (Gardner et al., 2015). Shoulder, head, hip and knee are reported to be the most common regions that impact the head and are responsible for the greatest number of concussive injuries in rugby (Cusimano et al., 2013; Fuller et al., 2010; Gardner et al., 2014; Toth, Mcneil, & Feasby, 2005). In each of the common injury events reported in elite men’s rugby, there are unique combinations of impact conditions which include effective mass, compliance, velocity and location of impact. The head-to-head event represents a low mass, low compliance event, whereby the hip and shoulder-to-head collisions represents high mass, high compliance events. Scientists have conducted research in an effort to describe incidence and mechanisms of concussive injury in rugby, however, little is known about the biomechanics of head injury in the sport (Fréchède & Mcintosh, 2009; Fréchède & McIntosh, 2007; McIntosh et al., 2000). The purpose of this thesis is to characterize dynamic response and brain tissue deformation for (1) hip-to-head, (2) shoulder-to-head, (3) knee-to-head, and (4) head-to-head concussion events in men’s rugby. Twenty-nine (29) impact videos of diagnosed concussive injuries associated with the four common injury events were reconstructed in the Neurotrauma Impact Science Lab. Head-to-head impacts were reconstructed in this study using a pendulum system, while hip, shoulder and knee to head impacts were reconstructed using the pneumatic linear impactor. Results of this study demonstrate that the common injury events resulting in concussion in elite men’s rugby have different dynamic response characteristics. Head-to-head events produced significantly greater peak linear and peak rotational acceleration, however no significant differences in maximum principal strain between the injury events. Results of this study can be useful in reducing rates and severity of concussive injury in rugby.

Concerns about safety in youth hockey have been openly expressed in public and in academic circles. Sports injury literature continue to report that the prevalence of injury in hockey remains high at both the grassroots and elite levels. Much of this injury reporting, however, utilize injury reporting methods that provide very little about how and why these injuries are occurring. The comprehensive prospective observational approach utilized in this thesis proved most effective in understanding not only injury events and head contact events, but how and why they are taking place throughout the course of a hockey game. Knowing the contextual factors surrounding such events are important in building injury prevention strategies and to minimize all types of head contact. As evidenced in this research, the type of head contact being experienced differs according to age level, which means measures to reduce head contact must be targeted at specific age levels. With this said, given the amount of head contact that was documented throughout all levels of hockey, it does warrant further monitoring of the sport to ascertain the extent to which head trauma is impacting player brain development and to strive further in eliminating head contact altogether.

The purpose of the current study was to explore potential differences in pre- and post-concussion performance on a computerized neurocognitive concussion test between African American and White high-school and collegiate student-athletes. A prospective case-control design was used to compare baseline and 2- and 7-day post-concussion computerized neurocognitive performance and symptoms between 48 White and 48 African American athletes matched for age, gender, and concussion history. The Immediate Post-Concussion Assessment Cognitive Test (ImPACT) version 2.0 (NeuroHealth System, LLC, Pittsburgh, PA, USA) computer software program was used to assess neurocognitive function (i.e., verbal and visual memory, motor processing speed, and reaction time) and concussion symptoms. Regardless of race/ethnicity, there were significant decrements in computerized neurocognitive performance and increased symptoms following a concussion for the entire sample. African Americans and Whites did not differ significantly on baseline or post-concussion verbal memory, visual memory, reaction time, and total reported symptoms. However, African American participants were 2.4× more likely to have at least one clinically significant cognitive decline on ImPACT at 7 days post-concussion and scored lower at 7 days post-concussion compared with baseline on processing speed than White participants. The authors concluded that the baseline ImPACT test was culturally equivalent and construct valid for use with these two racial/ethnic groups. However, in contrast, the findings support deleterious performance for the African American athletes compared with the White athletes on the ImPACT post-concussion evaluation that is of critical clinical relevance and warrants further research.

Title: Epidemiology of injuries in men's fastpitch softball Objective: Objective of this thesis is to evidence occurrence of injuries in men's fastpitch softball and focus on each type of injury due to the players position, find out what players do to prevent from injuries and how long it takes them to return on the fields Method: The non-standardized survey with closed questions was used as a method for this research. The survey was made in server survio.com in both Czech and English language and was sent to the world leading softball countries. Data was analysed in World Excel program. Results: The results show that the most common injuries are fractures (15,8 %), torn/tear ligaments or tendons (15 %), sprains (15,4 %) and overstretched muscles (13,5 %). Other types of injuries are also frequented, but the above can be described as the most common. Injuries of the lower limbs are most common (51 %) and specifically injuries of the ankle (23,2 %). Most injuries occur during defensive skills (39,6 %) and during running around bases (36,4 %). In almost one third (28,6 %) of all cases, recovery took 3-4 weeks and more than half (62,3 %) of all injuries occurred during the match. In comparison between the positions, most injuries occurred to middle infielders with 4,1 injuries per player rate....

The hypothesis that calcium influxes from the extracellular space play an important role in the pathogenesis of irreversible anoxic injury was tested using isolated adult rat myocytes. Myocytes treated with 6 mm amytal and 3 mm iodoacetate and subsequently incubated in either calcium-containing (1.12 mm) or calcium-free media (with or without 1 mm EGTA) developed rigor contracture (cell squaring) and cell death (trypan blue permeability) at the same rate. The rates of cell death in both calcium-containing and calcium-free media were increased by incubation in hypotonic media even though the rates of contracture development remained unaltered. Cells developed osmotic fragility prior to membrane permeability increases. The calcium ionophore, A23187 (10 μm), induced rapid rounding of rod-shaped cells subjected only to mitochondrial inhibition in calcium containing media, confirming its ability to cause an increase in cellular permeability to calcium. However, A23187 did not alter the rates of cell death of totally metabolically inhibited myocytes in either calcium-containing or calcium-free media with EGTA. The results indicate that influxes of calcium are not necessary for the development of irreversible injury in metabolically inhibited, isolated myocytes.

Mild Traumatic Brain Injury (mTBI) can be broken into two categories; complicated and uncomplicated. These categories are based on structural imaging scans during the assessment of the injury. If abnormalities appear in the scan, we refer to it as complicated. The present research aims at determining whether there are differences in the neuropsychological deficits in the presences of positive neuroimaging as opposed to negative neuroimaging. This was accomplished with meta-analytic techniques. It was found that neuroimaging does not predict neuropsychological functioning in the chronic state of mTBI.

Thesis (Ed.D.)--Boston University / Background: Season-ending injuries, particularly those to the anterior cruciate ligament (ACL), continue at a high-rate in many sports, particularly ski racing. Although many factors are thought to contribute to this injury rate in both genders, no study has looked at possible psychological influences. Hypothesis: There is a form of post-traumatic stress disorder (PTSD) that affects athletes after seeing someone in their own sport sustain a serious injury. The result could be a decrease in performance both on and off the mountain. In the worst-case scenario, this change in tactics could result in injury to themselves, representing an "injury contagion". Study Design: Case-control study; Level of evidence, 3. Methods: Students at four Eastern ski academies were studied for 3 consecutive years (2002-2005). The subjects ranged in age from 13-19 and consisted of 277 men (60.3%) and 182 women (39.7% ). When a subject sustained a season-ending injury, a peer group of that subject was tested for both psychological and performance effects. The results of this testing was compared to previous baseline testing and a similarly constructed control group from an academy without such an injury. Results: There were twelve season-ending injuries sustained over the three-year period. Significant data results were obtained from one aspect of the psychological testing of the peer group. There was a trend toward a possible "injury contagion" i.e. injury to a member of the peer group soon after injury to a teammate. Conclusions: Although the results of this study were inconclusive in establishing the existence of an "injury contagion", there were data to establish a psychological affect on some athletes after injury to one of their teammates. Clinical Relevance: Although a teammate's injury did not measurably effect performance and only showed mild evidence of a possible injury contagion, there were significant psychological affects noted in female subjects. School personnel should be trained in basic counseling techniques specific to this problem.

Thesis (Ed.D.)--Boston University / PLEASE NOTE: Boston University Libraries did not receive an Authorization To Manage form for this thesis or dissertation. It is therefore not openly accessible, though it may be available by request. If you are the author or principal advisor of this work and would like to request open access for it, please contact us at open-help@bu.edu. Thank you. / Problem The purpose of this study was to investigate the relation of anxiety to learning in brain injured adults, and to determine how their performance was affected by reassurance instructions, additional practice, and variations in task content and difficulty. Scope The study involved forty patients with brain injury of cerebrovascular origin who were admitted to the neurological service of a hospital in the Massachusetts Public Health system. The patients ranged in age from fifty to sixty six, and in intelligence quotient from eighty to one hundred and twelve. They were evenly divided on sex, but the lateral distribution of lesion favored the right cerebral hemisphere with seventy per cent of the patients having damage on that side, and thirty per cent on the contralateral side. None of the patients had dysphasic language disorders or visual disorders, and at the time of participation in the study all were scheduled to commence therapy within a period of two weeks. Procedure Patients scoring in the upper and lower forty per cent of the distribution of anxiety scores on both the Buss Anxiety Rating Scale, and the Manifest Anxiety Scale were matched in respect to age, intelligence, sex, and the lateral location of cerebral lesion. They were then assigned to either an additional practice or a reassurance instructions treatment category on the basis of a table of random numbers. [TRUNCATED] / 2031-01-01