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Theses/Dissertations

2013

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Articles 2191 - 2202 of 2202

Full-Text Articles in Medicine and Health Sciences

Choice Response Time Differences Between Recently Recovered Concussed And Healthy Student-Athletes, Tiffen Tapia-Lovler Jan 2013

Choice Response Time Differences Between Recently Recovered Concussed And Healthy Student-Athletes, Tiffen Tapia-Lovler

Electronic Theses and Dissertations

Some 1.6 to 3.8 million sports-related concussions occur annually in the United States. Utilization of test batteries and exercise protocols are recommended to ensure athletes recover completely. Many batteries involve response time (RT) tests, which show response time increases post concussion. A major limitation of RT tests is that all are done in static position. Additionally, many studies show a lingering effect on RT. The addition of RT tests to check for lingering symptoms could be beneficial. The purpose of this study was to see if significant differences could be found in RT tests involving dynamic movement between healthy studentathletes …

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Impedance Changes In Biceps Brachii Due To Isometric Contractions And Muscle Fatigue Using Electrical Impedance Myography (Eim), Travis Orth Jan 2013

Impedance Changes In Biceps Brachii Due To Isometric Contractions And Muscle Fatigue Using Electrical Impedance Myography (Eim), Travis Orth

Electronic Theses and Dissertations

Electrical impedance myography (EIM) is a non-invasive technique used to evaluate neuromuscular conditions by using a quantitative parameter called impedance (Z). It relies upon the application and measurement of high-frequency, low-intensity electrical current imbedded over a localized muscle to determine its opposition to current flow. In brevity, impedance determines the resistance of muscle fibers due to changes in muscle composition. The objective of this thesis was to establish a relationship between muscles at rest and during isometric contractions at various force levels(25%, 50%, and 100% of maximum voluntary contraction) of the biceps brachii over a multifrequency spectrum. Impedance measurements due …

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Herpes Simplex Virus Type 1 Glycoprotein Gm And The Membrane Associated Protein Ul11 Are Required For Virus-Induced Cell Fusion And Efficient Virus Entry, In Joong Kim Jan 2013

Herpes Simplex Virus Type 1 Glycoprotein Gm And The Membrane Associated Protein Ul11 Are Required For Virus-Induced Cell Fusion And Efficient Virus Entry, In Joong Kim

LSU Doctoral Dissertations

HSV-1 facilitates virus entry into cells and cell-to-cell spread by mediating fusion of the viral envelope with cellular membranes and fusion of adjacent cellular membranes. Although virus strains isolated from herpetic lesions cause limited cell fusion in cell culture, clinical herpetic lesions typically contain large syncytia, underscoring the importance of cell-to-cell fusion in virus spread in infected tissues. Certain mutations in gB, gK, UL20 and other viral genes, drastically enhance virus-induced cell fusion in vitro and in vivo. Recent work has suggested that gB is the sole fusogenic glycoprotein, which is regulated by interactions with viral glycoproteins gD, gH/gL, gK, …

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Modulation Of Intrinsic Activity In Sensory Cortex Facilitates Task Performance, Aburahman Elkhetali Jan 2013

Modulation Of Intrinsic Activity In Sensory Cortex Facilitates Task Performance, Aburahman Elkhetali

All ETDs from UAB

Due to the changing demands of the environment and our behavioral intentions the brain has to adapt in order to produce task appropriate responses. Part of the challenge is the large amount of sensory information received by the brain. Depending on individu-al goals, the brain must select and react to task appropriate stimuli while ignoring other irrelevant sensory input. Since behavioral intentions are dynamic, this requires the re-sponses within the brain to also be dynamic. Cognitive control, exerted by higher centers on sensory cortex allow for selection of task relevant stimuli. In this study we find that intrinsic, non-stimulus driven …

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Hospitalists And Organizational Performance, Josué Patien Epané Jan 2013

Hospitalists And Organizational Performance, Josué Patien Epané

All ETDs from UAB

Two decades ago, a group of hospital-based physicians (hospitalists) specializing in the practice of hospital medicine were introduced in the U.S. health care system. Since then, this group of physicians has experienced an unprecedented growth. Prior studies on hospitalists have focused on benefits associated with the use of hospitalists. Compared to non-hospitalists, these studies revealed that hospitalists are more efficient as they are able to reduce length of stay and costs while achieving similar or better quality of care. However, most of these studies have been cross-sectional, limited to few hospitals, and limited to pediatric and teaching hospitals. Very little …

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Photothermal Desorption Of Toluene From Single Walled Carbon Nanotube And Activated Carbon Sorbents, Evan Lee Floyd Jan 2013

Photothermal Desorption Of Toluene From Single Walled Carbon Nanotube And Activated Carbon Sorbents, Evan Lee Floyd

All ETDs from UAB

Millions of workers are occupationally exposed to volatile organic compounds (VOC) annually, requiring exposure assessments through air sampling. Reducing time to knowledge while maintaining adequate sensitivity and affordability is a constant struggle. Sorbent sampling is the preferred technique for VOC exposure assessments. Chemical desorption of sorbents is the most common desorption technique, but sensitivity is limited due to the small injection fraction. Thermal desorption has excellent sensitivity, but provides only one analysis per sample and is cost prohibitive. The goal of this dissertation was to develop a desorption technique that bridges the sensitivity gap between chemical desorption (0.1%) and thermal …

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The Relationship Of Maternal Depressive Symptoms Among First Time Adolescent And Adult Mothers And Their Safe Parenting Practices And Child Injuries, Angela Warren Baumann Jan 2013

The Relationship Of Maternal Depressive Symptoms Among First Time Adolescent And Adult Mothers And Their Safe Parenting Practices And Child Injuries, Angela Warren Baumann

All ETDs from UAB

Maternal depressive symptoms have been associated with deficits in parenting practices that protect children from injuries; however, few studies have been conducted to examine these relationships. Using data from a multisite longitudinal study of 252 first-time mothers, the relationships between the use of safe parenting practices and maternal depressive symptoms was examined, taking into account mother's resources (as defined by age and education level) and race at five time points during the first 3 years of the child's life. Depressive symptoms were assessed using the Beck Depression Inventory. Measures of maternal depressive symptoms, safe parenting practices (use of car seat, …

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Impact Of Quality Performance On Financial Risk And Cost Of Capital In Hospitals, James D. Byrd Jr Jan 2013

Impact Of Quality Performance On Financial Risk And Cost Of Capital In Hospitals, James D. Byrd Jr

All ETDs from UAB

This study evaluated the relationship of hospital quality of care as measured by mortality scores to hospital cost of capital as represented by average cost of debt. A composite mortality score (weighted average of Hospital Compare's risk adjusted mortality rate for each hospital) was regressed against the hospitals' average cost of debt using OLS and the Stata 11 robust clustering function to adjust for repeated occurrences of hospitals across years. The data base consisted of acute care hospitals with interest expense observed over the three year period 2008 - 2010 (n=3420). Control variables included a number of hospital characteristic (e.g., …

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Experience-Dependent Synaptic Integration Of Adult-Generated Dentate Granule Cells, Jessica Hotard Chancey Jan 2013

Experience-Dependent Synaptic Integration Of Adult-Generated Dentate Granule Cells, Jessica Hotard Chancey

All ETDs from UAB

The dentate gyrus (DG) contains neural stem cells that continually generate new neurons throughout life. The contribution of adult neurogenesis to hippocampal function is not well understood, but ablation or silencing of adult-generated neurons in the DG disrupts learning and memory, and neurogenesis is altered in many pathologies associated with impaired cognition including Alzheimer's Disease, epilepsy, and schizophrenia. Neurogenesis in the DG is a stepwise process in which neural stem cells leave the cell cycle and undergo an approximately two month long maturation process to form fully functional dentate granule cells (GCs) that are indistinguishable from those formed during development. …

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The Role Of Il-21 And Il-17 In Regulating Follicular T Helper Cells In Germinal Center Response Of Autoimmunity, Yanna Ding Jan 2013

The Role Of Il-21 And Il-17 In Regulating Follicular T Helper Cells In Germinal Center Response Of Autoimmunity, Yanna Ding

All ETDs from UAB

Overreactivity of the germinal center (GC) is a central feature of autoantibody-mediated autoimmune diseases. Follicular T helper (Tfh) cells are the primary T helper subset that migrates to the incipient GC and forms close contacts with GC-B cells to promote GC formation and help GC-B cell differentiation, resulting in high-affinity antibody production. Increased levels of interleukin (IL)-21 and aberrant accumulation or function of Tfh cells have been associated with autoimmune disease severity in humans and lupus-prone mice. Follicular regulatory T (Tfr) cells are the regulatory T cell subset that also localizes in the GC and inhibits GC B cell differentiation. …

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Copper Oxide Wire Particles Used To Control Haemonchus Infections : Efficacy In Giraffe (Giraffa Camelopardalis) At Busch Gardens Tampa And Potential Mechanism Of Action, Allyson Kinney Moscona Jan 2013

Copper Oxide Wire Particles Used To Control Haemonchus Infections : Efficacy In Giraffe (Giraffa Camelopardalis) At Busch Gardens Tampa And Potential Mechanism Of Action, Allyson Kinney Moscona

LSU Master's Theses

Gastrointestinal nematode (GIN) infections affect production systems and exotic hoofstock in zoos, particularly giraffe (Giraffa camelopardalis). Anthelmintic resistance (AR) prevalence is increasing in production systems and zoos. To combat the AR that compounds GIN problems, alternative control methods are used. One such alternative is copper oxide wire particles (COWP), which control the abomasal nematode Haemonchus contortus. COWP was given to seven adult giraffe at Busch Gardens Tampa, at descending dosages: 25 g, 12.5 g, 6.3 g. Treatment administration time was determined by fecal egg count (FEC) being above 600 eggs per gram (EPG), and therefore varied with each animal. FEC …

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Predictors Of Colorectal Cancer Surveillance Among Survivors Of Childhood Cancer At High Risk For Subsequent Colorectal Malignancies, Casey Leigh Daniel Jan 2013

Predictors Of Colorectal Cancer Surveillance Among Survivors Of Childhood Cancer At High Risk For Subsequent Colorectal Malignancies, Casey Leigh Daniel

All ETDs from UAB

Childhood cancer survivors who were treated with ionizing radiation are at a significantly higher risk of developing a subsequent colorectal cancer (CRC) compared to the general population. The Children's Oncology Group (COG) recommends that children and adolescents who were treated with radiation therapy of 30 Gy or more to the abdomen, pelvis, or spine undergo a colonoscopy every five years, beginning at age 35 or 10 years after completion of radiation. Despite these recommendations, research indicates low adherence rates to CRC screening among high-risk childhood cancer survivors. Determining the predictors of attending subsequent colorectal cancer surveillance among individuals in this …

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