Sports Participation and Physical Education in American Secondary Schools: Current Levels of Racial/Ethnic and Socioeconomic Disparities

Summarizes findings from a study of physical education requirements and school-based physical activity among American schoolchildren. Analyzes data by gender, grade, race/ethnicity and socioeconomic status

Behavioral and neural signatures of working memory in childhood

Working memory function changes across development and varies across individuals. The patterns of behavior and brain function that track individual differences in working memory during human development, however, are not well understood. Here, we establish associations between working memory, other cognitive abilities, and functional MRI (fMRI) activation in data from over 11,500 9- to 10-year-old children (both sexes) enrolled in the Adolescent Brain Cognitive Development (ABCD) Study, an ongoing longitudinal study in the United States. Behavioral analyses reveal robust relationships between working memory, short-term memory, language skills, and fluid intelligence. Analyses relating out-of-scanner working memory performance to memory-related fMRI activation in an emotiona

Tobacco Counter-Marketing And Policy In A University Setting: The Use Of Experiential Learning Projects To Bring About Change

Four million deaths from tobacco-related illness and disease occurred worldwide in 1999 and that number is likely to increase to 10 million by the 2030s. Each year, 430,000 Americans die from such causes. Tobacco use among young people has remained constant, and in some cases, increased even though information regarding the hazards of tobacco consumption has received growing attention over the last decade, The present paper discusses the process and results of an undergraduate experiential learning project designed to 1) educate college students about the hazards of tobacco consumption, 2) prevent or reduce college students’ consumption of tobacco products through counter-marketing efforts, and 3) assess and change current tobacco related policies on campus. The two-semester project incorporated both fall and spring Promotion Management and Health Care Management classes and involved cooperation from the College of Business, the Medical School, and the Office of Student Affairs

An IDEA Model Analysis of Instructional Risk Communication in the Time of Ebola

The Ebola outbreak and its rapid spread throughout West Africa and other countries was a megacrisis that imposed numerous challenges to those communicating to nonscientific publics about the epidemic. This article examines the instructional risk messages offered in the days that followed the 2014 infection and death of Liberian national Thomas Eric Duncan in Dallas, Texas. More specifically, we apply the IDEA model for effective instructional risk and crisis communication embellished by exemplification theory to conduct a thematic analysis of messages offered locally (Dallas news stories and press releases), nationally (Centers for Disease Control and Prevention Live Chat Twitter posts), and internationally (website content from the World Health Organization, the United Nations Children’s Fund, and Doctors Without Borders). Our conclusions reveal that the majority of messages offered from each organization privileged the element of explanation over internalization and action as well as negative over positive exemplification. On the basis of these conclusions, and informed by previous research, we propose a number of potential implications and recommendations for offering a balanced representation among internalization, explanation, and action as proposed in the IDEA model. We also suggest that positive exemplification could be used strategically to motivate receivers to attend to these messages (internalization), reduce potential misunderstandings (explanation), and take appropriate self-protective actions (action). Agency spokespersons and media reporters may find the conclusions and recommendations drawn from this analysis to be useful when crafting similar instructional risk preparedness and crisis response messages

Peer Helping in an Intercollegiate Athletic Environment

Intercollegiate student-athletes face a variety of unique responsibilities and stressors. Balancing practice, training, traveling, and academics can be overwhelming. To assist student-athletes with these issues, the peer helper program called the Student Peer Athlete Network (SPAN) was developed. SPAN was designed to train specific student-athletes in peer helper skills so they, in turn, can assist other student-athletes who need support or assistance for certain personal, academic, or athletic concerns. Empowering student-athletes promotes a sense a self-responsibility and benefits the entire student-athlete population

Evaluation of denoising strategies to address motion-correlated artifacts in resting-state functional magnetic resonance imaging data from the human connectome roject

Like all resting-state functional connectivity data, the data from the Human Connectome Project (HCP) are adversely affected by structured noise artifacts arising from head motion and physiological processes. Functional connectivity estimates (Pearson's correlation coefficients) were inflated for high-motion time points and for high-motion participants. This inflation occurred across the brain, suggesting the presence of globally distributed artifacts. The degree of inflation was further increased for connections between nearby regions compared with distant regions, suggesting the presence of distance-dependent spatially specific artifacts. We evaluated several denoising methods: censoring high-motion time points, motion regression, the FMRIB independent component analysis-based X-noiseifier (FIX), and mean grayordinate time series regression (MGTR; as a proxy for global signal regression). The results suggest that FIX denoising reduced both types of artifacts, but left substantial global artifacts behind. MGTR significantly reduced global artifacts, but left substantial spatially specific artifacts behind. Censoring high-motion time points resulted in a small reduction of distance-dependent and global artifacts, eliminating neither type. All denoising strategies left differences between high- and low-motion participants, but only MGTR substantially reduced those differences. Ultimately, functional connectivity estimates from HCP data showed spatially specific and globally distributed artifacts, and the most effective approach to address both types of motion-correlated artifacts was a combination of FIX and MGTR

Antibiotic resistance in Staphylococcus aureus-containing cutaneous abscesses of patients with HIV

PURPOSE: The aim of this study was to document the resistance patterns found in exudates from cutaneous abscesses of HIV-infected persons. BASIC PROCEDURES: Patient records were reviewed on 93 culture and sensitivity tests performed on exudates taken from incised and drained abscesses of HIV-infected persons. MAIN FINDINGS: Of the specimens, 84.6% were Staphylococcus aureus. Of these, 93.5% were penicillin resistant, 87% oxacillin resistant, 84.4% cephazolin resistant, 84.4% erythromycin resistant, 52.2% ciprofloxacin resistant, and 15.6% tetracycline resistant. Fifty-eight specimens were tested for clindamycin with 29.3% found resistant; 85.7% were methicillin-resistant S aureus (MRSA) (defined as resistant to both penicillin G and oxacillin). All specimens were resistant to multiple antibiotics including antimicrobials that might be considered for use in MRSA. No specimens were resistant to trimethoprim-sulfamethoxazole, rifampin, or vancomycin. CONCLUSIONS: Empiric antimicrobial therapy of HIV-infected persons with cutaneous abscesses must be tailored to the high frequency of antimicrobial drug resistance including MRSA in this population

Collagen I-Matrigel Scaffolds for Enhanced Schwann Cell Survival and Control of Three-Dimensional Cell Morphology

We report on the ability to control three-dimensional Schwann cell (SC) morphology using collagen I Matrigel composite scaffolds for neural engineering applications. SCs are supportive of nerve regeneration after injury, and it has recently been reported that SCs embedded in collagen I, a material frequently used in guidance channel studies, do not readily extend processes, instead adopting a spherical morphology indicative of little interaction with the matrix. We have modified collagen I matrices by adding Matrigel to make them more supportive of SCs and characterized these matrices and SC morphology in vitro. Incorporation of 10%, 20%, 35%, and 50% Matrigel by volume resulted in 2.4, 3.5, 3.7, and 4.2 times longer average SC process length after 14 days in culture than with collagen I only controls. Additionally, only 35% and 50% Matrigel constructs were able to maintain SC number over 14 days, whereas an 88% decrease in cells from initial seeding density was observed in collagen-only constructs over the same time period. Mechanical testing revealed that the addition of 50% Matrigel increased matrix stiffness from 6.4kPa in collagen I only constructs to 9.8kPa. Furthermore, second harmonic generation imaging showed that the addition of Matrigel resulted in non-uniform distribution of collagen I, and scanning electron microscope imaging illustrated distinct differences in the fibrillar structure of the different constructs. Collectively, this work lays a foundation for developing scaffolding materials that are concurrently supportive of neurons and SCs for future neural engineering applications.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/78114/1/ten.tea.2008.0406.pd