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Articles 1 - 30 of 35
Full-Text Articles in Nervous System
Effects Of The Injury Recovery Process On Neuromuscular Activation In An Uninjured Ankle, Mark Tankersley
Effects Of The Injury Recovery Process On Neuromuscular Activation In An Uninjured Ankle, Mark Tankersley
CMC Senior Theses
This study was conducted to observe the effects of changed activity levels due to a major lower extremity injury on ankle function in the uninjured leg. Neuromuscular activation in the Gastric Medialis (GAS) and Tibialis Anterior (TA), the muscles primarily responsible for movement at the ankle, was assessed in 8 athletes at the Claremont Colleges while walking on a flat surface, stepping up a 15º incline, and stepping up a 27º incline. Athletes were split into two groups based on injury condition: a “recovered” group (n=4) who had suffered a major lower extremity injury in the last two years in …
Central Activation Of Orl-1 Receptors In Heart Failure Models, Jeffrey Angell
Central Activation Of Orl-1 Receptors In Heart Failure Models, Jeffrey Angell
Theses & Dissertations
Heart failure is a prevalent and debilitating disease associated with high morbidity and mortality rates worldwide and is the leading cause of death in the United States. While various therapeutic strategies have been developed and approved to manage heart failure, exploration of novel targets and mechanisms are essential for improving patient outcomes. This thesis investigates the therapeutic potential of the central activation of opioid receptor-like 1 (ORL-1) by nociceptin in a rodent heart failure model.
Furthermore, this study aims to elucidate the central mechanisms underlying nociceptin induced cardiovascular and renal effects in heart failure. This involves investigating neuronal pathways and …
Effective Therapies And Nursing Approaches: Improving Cognition In Older Adult Stroke Patients, Selyna Baltazar
Effective Therapies And Nursing Approaches: Improving Cognition In Older Adult Stroke Patients, Selyna Baltazar
Nursing | Senior Theses
Background
Ischemic stroke occurs in thousands of older adults throughout the year. Due to the lack of oxygen entering the brain, many patients experience a decline in cognitive function due to ischemic stroke. Cognition is the ability to understand, learn, and remember information which is needed for completing daily tasks. Modern technology has allowed for patients to survive ischemic strokes but has yet to provide proper screening tools and methods for stroke-related cognitive impairment.
Objective
To investigate the best practices for identifying, treating, and caring for patients with a cognitive injury related to a stroke. A review of the research …
Current And Novel Neuroregenerative Therapies, Arrin Brooks
Current And Novel Neuroregenerative Therapies, Arrin Brooks
Theses, Dissertations and Capstones
Underlying the physical and cognitive deficits consequent of many neuropathologies is one common factor, the loss of neurons. While neurodegenerative diseases, stroke, and traumatic brain injury arise from a variety of etiologies, they all ultimately result in injury and/or death of neuronal cells and concomitant functional deficits. In the present work we primarily focus on current and potential treatments for localized lesions, particularly those in the striatum of Parkinson’s disease (PD) or the cortex as in stroke. First, we discuss a new surgical technique for deep brain stimulator (DBS) placement, as DBS is a mainstay treatment for movement disorders including …
Physiological Effects Of Activity-Based Anorexia In Female Rats And An Overview Of Eating Disorders, Madelyn Uyemura
Physiological Effects Of Activity-Based Anorexia In Female Rats And An Overview Of Eating Disorders, Madelyn Uyemura
Regis University Student Publications (comprehensive collection)
The aim of this thesis is to bring AN to the foreground of conversation both in a scientific and sociological framework. Nearly 40 million Americans suffer from anxiety disorders, which is characterized by the feeling of a loss of control. In some cases, another disorder called anorexia nervosa (AN) can codevelop. AN is characterized by a refusal, and inability, to maintain a healthy body weight. Some suffering from anxiety may restrict caloric intake and increase exercise to cope with stress. This results in extreme caloric deprivation. AN can be modeled in rats using an activity-based anorexia (ABA) method. In …
Multiple Sclerosis And Its Symptom Management Through Supplementation And Dietary Planning, Lindsey J. Davis
Multiple Sclerosis And Its Symptom Management Through Supplementation And Dietary Planning, Lindsey J. Davis
Selected Honors Theses
Multiple Sclerosis (MS) is an autoimmune, neuroinflammatory disorder that is characterized by the breakdown of myelinated axons in the Central and Peripheral Nervous Systems. It is a potentially debilitating autoimmune disease that affects almost 1 million people in the United States, and nearly 2.5 million people worldwide. The precise etiology of MS is still being researched, but much progress has been made towards understanding the molecular mechanisms and impactful ways to treat this disease. While there is still no cure, new treatment plans are constantly being orchestrated in effort to alleviate the burden that MS carries. Combination treatment plans have …
Apathy And Brain Atrophy During The First Year Of Moderate-Severe Traumatic Brain Injury: A Longitudinal Study, Gulnaz Kudoiarova
Apathy And Brain Atrophy During The First Year Of Moderate-Severe Traumatic Brain Injury: A Longitudinal Study, Gulnaz Kudoiarova
Dissertations, Theses, and Capstone Projects
Apathy, defined as disinterest and loss of motivation, is a common complication after moderate-severe traumatic brain injury (msTBI). The existing body of research in various neurological and neurodegenerative disorders suggests that apathetic symptoms may be associated with variation in the volume of the brain regions such as dorsal anterior cingulate cortex and ventral striatum. However, the longitudinal pattern of TBI-induced atrophy in these key regions and its relationship with apathy symptoms remain to be demonstrated. The current study aimed to describe the atrophy pattern in the anterior cingulate gyrus (ACG) and the nucleus accumbens (NAc; part of ventral striatum) after …
Machine Learning Classification Of Traumatic Brain Injury Patients Versus Healthy Controls Using Arterial Spin Labeled Perfusion Mri, Vanessa I. Grass
Machine Learning Classification Of Traumatic Brain Injury Patients Versus Healthy Controls Using Arterial Spin Labeled Perfusion Mri, Vanessa I. Grass
Dissertations, Theses, and Capstone Projects
Traumatic brain injury (TBI) is one of the most common causes of death and disability worldwide, yet accurate in vivo detection of TBI neuropathology remains challenging due to complexities in the structural and functional changes observed post-injury as well as limitations in conventional neuroimaging modalities. Although advanced neuroimaging techniques such as arterial spin labeling (ASL) can noninvasively assess cerebral blood flow (CBF) changes observed post-injury, this technique is underutilized in TBI research partly due to the low signal-to-noise-ratio (SNR) inherent in ASL imaging. The aim of the current study is to examine the use of machine learning, specifically a Support …
Sexually Dimorphic Oxytocin Receptor-Expressing Neurons In The Anteroventral Periventricular Nucleus Regulates Maternal Behavior, Kaustubh Sharma
Sexually Dimorphic Oxytocin Receptor-Expressing Neurons In The Anteroventral Periventricular Nucleus Regulates Maternal Behavior, Kaustubh Sharma
LSU Doctoral Dissertations
The neurohypophysial hormone oxytocin is involved in the regulation of social behaviors, including social recognition, pair bonding, and sex-specific parental behaviors in a variety of species. Oxytocin triggers these social behaviors by binding to oxytocin receptors (OXTR) in various parts of the brain. Oxytocin-induced sex-typical behavior, therefore, suggests a sexual dimorphic distribution of OXTR in the brain. In recent years, the oxytocin system in the brain received tremendous attention as a potential pharmacological target for treatment of many psychiatric disorders, such as anxiety, autism spectrum disorders, and even sex-specific psychiatric disorder like postpartum depression (PPD). An important problem and a …
Aci-35 And Aadvac1 Active Immunotherapy As Preventative Treatment Options For Chronic Traumatic Encephalopathy, Emily C. Boehlein
Aci-35 And Aadvac1 Active Immunotherapy As Preventative Treatment Options For Chronic Traumatic Encephalopathy, Emily C. Boehlein
Selected Honors Theses
One of the most common, as well as one of the most dangerous injuries amongst athletes today is mild traumatic brain injury (mTBI), commonly known as concussion. Aside from physical symptoms such as nausea, dizziness, and headaches; concussions have can have longterm effects on brain physiology. A common neurological disease that can result from multiple concussions is Chronic Traumatic Encephalopathy (CTE), characterized by symptoms such as severe depression, anxiety, confusion, and aggression; amongst others.1 On the cellular level, CTE is classified by a unique pathway that leads to the hyperphosphorylation of tau protein and subsequent clumping of tau-containing neurofibrillary tangles …
Investigating The Metabolic Progression Of Glioblastoma With Hyperpolarized Magnetic Resonance, Travis Salzillo
Investigating The Metabolic Progression Of Glioblastoma With Hyperpolarized Magnetic Resonance, Travis Salzillo
Dissertations & Theses (Open Access)
Rapid diagnosis and therapeutic monitoring of aggressive diseases such as glioblastoma (GBM) can improve patient survival by providing physicians the time to optimally deliver treatment. This includes early in development, while the tumor is still manageable, or following initial therapy, when alternative treatments should be considered. The main goal of this project was to determine whether metabolic imaging with hyperpolarized magnetic resonance spectroscopy (MRS) could detect changes in tumor progression more rapidly than conventional anatomic magnetic resonance imaging (MRI) in patient-derived GBM murine models. To comprehensively capture the dynamic nature of cancer metabolism, in vivo pyruvate-to-lactate conversion with hyperpolarized MRI, …
The Effect Of Hypoxia On Brain Cell Proliferation In Weakly Electric Fish, Petrocephalus Degeni, Kaitlin Klovdahl
The Effect Of Hypoxia On Brain Cell Proliferation In Weakly Electric Fish, Petrocephalus Degeni, Kaitlin Klovdahl
Senior Theses and Projects
Oxygen levels tend to remain at a steady state concentration in the Earth’s atmosphere, yet in some bodies of water, they can fluctuate and decrease drastically. Many organisms that inhabit the swamps, lakes, streams, and parts of the ocean where this occurs have evolved adaptations to manage this environmental uncertainty and continue normal oxygen consumption. The Lwamunda swamp in Uganda is chronically hypoxic, yet it is home to many species, including the electric fish Petrocephalus degeni. P. degeni are unusual by nature of their immense brain, and the Lwamunda swamp appears ill-suited for maintaining this large, metabolically active organ. To …
Recovery From Visual Dysfunction Following Mild Traumatic Brain Injury Is Associated With Adaptive Reorganization Of Retinal Inputs To Lateral Geniculate Nucleus In The Mouse Model Utilizing Central Fluid Percussion Injury., Vishal C. Patel
Theses and Dissertations
Traumatic brain injury (TBI) is a leading cause of morbidity and mortality nationwide. Prevalence of mild TBI (mTBI) vastly outnumbers more severe forms however the associated morbidity has only recently gained public attention. Visual dysfunction is a significant component of mTBI associated morbidity with recovery of function linked with improvement in global outcomes. Examination of sensory and motor pathways in other brain injury paradigms support that recovery is largely dependent on adaptive plasticity of remaining connections. Current examinations of visual function recovery following mTBI is limited to identifying evidence for recovery and objective evidence for adaptive plasticity is limited. Therefore, …
Investigating The Effects Of Excitotoxic Stimuli On The Suprachiasmatic Nucleus, Rachel A. Brandes
Investigating The Effects Of Excitotoxic Stimuli On The Suprachiasmatic Nucleus, Rachel A. Brandes
Chancellor’s Honors Program Projects
No abstract provided.
Investigating The Role Of Integrin Beta 3 In Dendritic Arborization In The Supragranular Developing Cerebral Cortex, Zachary Logan Holley
Investigating The Role Of Integrin Beta 3 In Dendritic Arborization In The Supragranular Developing Cerebral Cortex, Zachary Logan Holley
Senior Honors Projects, 2010-2019
Integrin subunits have been implicated in axonal and dendritic outgrowth. In particular, a strong positive association has been found between mutations in integrin beta 3 (Itgb3) and autism spectrum disorder, but little is known about neuronal Itgb3 function in vivo. Many forms of autism spectrum disorder are thought to arise from dysfunctional dendritic arborization and synaptic pruning. Global knockout of Itgb3 in mice leads to autistic-like behaviors. Itgb3-/- mice also have reduced callosal volume, a key neuroanatomical correlate of autism. Here, we test the hypothesis that Itgb3 is required for normal dendritic arborization in layer II/III pyramidal …
The Morphology And Evolution Of The Primate Brachial Plexus, Brian M. Shearer
The Morphology And Evolution Of The Primate Brachial Plexus, Brian M. Shearer
Dissertations, Theses, and Capstone Projects
Primate evolutionary history is inexorably linked to the evolution of a broad array of locomotor adaptations that have facilitated the clade’s invasion of new niches. Researchers studying the evolution of primates and of their individual locomotor adaptations have traditionally relied on bony morphology – a practical choice given the virtual non-existence of any other type of tissue in the fossil record. However, this focus downplays the potential importance of the many other structures involved in locomotion, such as muscle, cartilage, and neural tissue, which may each be influenced by separate selective forces because of their different roles in facilitating movement. …
Neuroprotective Strategies Following Experimental Traumatic Brain Injury: Lipid Peroxidation-Derived Aldehyde Scavenging And Inhibition Of Mitochondrial Permeability Transition, Jacqueline Renee Kulbe
Neuroprotective Strategies Following Experimental Traumatic Brain Injury: Lipid Peroxidation-Derived Aldehyde Scavenging And Inhibition Of Mitochondrial Permeability Transition, Jacqueline Renee Kulbe
Theses and Dissertations--Neuroscience
Traumatic brain injury (TBI) represents a significant health crisis. To date there are no FDA-approved pharmacotherapies available to prevent the neurologic deficits caused by TBI. Following TBI, dysfunctional mitochondria generate reactive oxygen and nitrogen species, initiating lipid peroxidation (LP) and the formation of LP-derived neurotoxic aldehydes, which bind mitochondrial proteins, exacerbating dysfunction and opening of the mitochondrial permeability pore (mPTP), resulting in extrusion of mitochondrial sequestered calcium into the cytosol, and initiating a downstream cascade of calpain activation, spectrin degradation, neurodegeneration and neurologic impairment.
As central mediators of the TBI secondary injury cascade, mitochondria and LP-derived neurotoxic aldehydes make promising …
A Meta-Analysis: A Functional Neuroanatomical Comparison Of Self-Esteem-Related And Postpartum Depression-Related Processing, Meghana Damaraju
A Meta-Analysis: A Functional Neuroanatomical Comparison Of Self-Esteem-Related And Postpartum Depression-Related Processing, Meghana Damaraju
Honors Theses
Background: Postpartum depression (PPD) is a psychiatric mood disorder that effects 1 in 10 women in the United States. There are relatively few behavioral studies looking at the association between PPD and self-esteem. There are even fewer studies looking at neuroimaging comparisons between PPD and self-esteem.. The goal of this study was to look at the neuroanatomical overlap of activated brain regions involved in both self-esteem and PPD processing. We hypothesized that the right amygdala, PCC, and insula would be involved in both processes.
Methods: Maps were created using the MKDA program in MATLAB. These images were extent-based cluster-wise …
Local Anesthesia Toxicity, Nicole Mccleery
Local Anesthesia Toxicity, Nicole Mccleery
Nursing Student Class Projects (Formerly MSN)
Local anesthesia (LA) provides a way to relieve temporary pain in a small part of the body and has been used for over 100 years (Fencl, 2015). LA also prevents the passage of surgical stimuli into the central nervous system (CNS) making a surgical procedure less painful for the patient (Noble, 2015). According to Noble, “altering the passage of stimuli from smaller diameter neurons in a confined area with lower drug dosages is called LA, such as the injection of LA around a surgical incision” (Noble, 2015, p.325). LA can be used in a variety of settings, such as in …
Spinal Cord Injury Induced Cardiac Decline And The Limitations Of Exercise., Kathryn Michele Deveau
Spinal Cord Injury Induced Cardiac Decline And The Limitations Of Exercise., Kathryn Michele Deveau
Electronic Theses and Dissertations
There is a general consensus that the level and the severity of spinal cord injury (SCI) impacts chronic cardiac abnormalities such that high thoracic and cervical SCI are the most severely affected. Furthermore, the extreme degree of immobility/inactivity experienced by the persons with SCI has implications on cardiac decline. Yet it has been difficult to separate the relative contributions of the decentralized autonomic nervous system (ANS) and the immediate and profound inactivity to chronic cardiac abnormalities. As such, this body of work sought to characterize a contusion SCI that results in persistent CV dysfunction. Echocardiography, Dobutamine stress echocardiography and pressure …
Neuroinflammation In Alzheimer's Disease And Vascular Cognitive Impairment, Erica M. Weekman
Neuroinflammation In Alzheimer's Disease And Vascular Cognitive Impairment, Erica M. Weekman
Theses and Dissertations--Physiology
It was once believed that the brain was immunologically privileged with no resident or infiltrating immune cells; however, now it is understood that the cells of the brain are capable of a wide range of inflammatory processes and phenotypes. Inflammation in the brain has been implicated in several disease processes such as Alzheimer’s disease (AD) and vascular cognitive impairment and dementia (VCID); however, the role of inflammation in these two dementias is poorly understood.
When we stimulated a pro-inflammatory phenotype with an adeno-associated viral vector in a transgenic mouse model of AD that develops Aβ plaques, we saw a pro-inflammatory …
Chronic Pancreatitis, Pain, And Anxiety In An Alcohol And High Fat Mouse Model, Tiffanie Clinkinbeard
Chronic Pancreatitis, Pain, And Anxiety In An Alcohol And High Fat Mouse Model, Tiffanie Clinkinbeard
Theses and Dissertations--Gerontology
Homeodynamic space (HDS) shrinks as vulnerability increases with aging and repeated damage to the cells. HDS is lost in alcoholic pancreatitis patients due to overconsumption of alcohol, smoking, and high fat diets. Etiologically relevant animal models for study of chronic pancreatitis (CP) are needed. In order to begin filling this gap a central purpose of this dissertation research was to examine relationships between the alcohol and high fat diet (AHF) and pancreatitis with attention to hypersensitivity and anxiety-like behaviors. The AHF diet induced pancreatitis described here etiologically mimics human risk factors of AHF consumption for advancement to alcoholic CP.
In …
Looking To The Future Of Stroke Treatment: Combining Recanalization And Neuroprotection In Acute Ischemic Stroke, Michael E. Maniskas
Looking To The Future Of Stroke Treatment: Combining Recanalization And Neuroprotection In Acute Ischemic Stroke, Michael E. Maniskas
Theses and Dissertations--Neuroscience
Stroke is the 5th leading cause of death in the U.S. with 130,000 deaths and around 800,000 affected annually. Currently, there is a significant disconnect between basic stroke research and clinical stroke therapeutic needs. Few animal models of stroke target the large vessels that produce cortical deficits seen in the clinical setting. Also, current routes of drug administration, intraperitoneal and intravenous, do not mimic the clinical route of intra-arterial drug administration. To bridge this divide, we have retro-engineered a mouse model of stroke from the current standard of care for emergent large vessel occlusion (ELVO) stroke, endovascular thrombectomy, to …
Phonophobia Mediates The Relationship Between The Myelinated Vagus And Selective Mutism, Alexandra Sherwood Batzdorf
Phonophobia Mediates The Relationship Between The Myelinated Vagus And Selective Mutism, Alexandra Sherwood Batzdorf
Senior Projects Spring 2016
When active, the myelinated vagus (the tenth cranial nerve) acts as a brake that inhibits sympathetic activity by reducing heart rate and blood pressure, and thus allows for social engagement by redirecting metabolic resources. Among those with selective mutism (SM), a disorder characterized by an inability to speak in certain situations, the vagal brake is dysregulated. One consequence of this is a weakening of the middle-ear acoustic reflex (MEAR), which helps clarify human voices and filters out low-frequency background noise, including the speaker’s own voice. I tested a proposed etiological model of SM and comorbid social anxiety disorder (SAD) by …
How The Manipulation Of The Ras Homolog Enriched In Striatum Alters The Behavioral And Molecular Progression Of Huntington’S Disease, Franklin A. Lee
How The Manipulation Of The Ras Homolog Enriched In Striatum Alters The Behavioral And Molecular Progression Of Huntington’S Disease, Franklin A. Lee
University of New Orleans Theses and Dissertations
Huntington’s disease is an incurable, progressive neurological disorder characterized by loss of motor control, psychiatric dysfunction, and eventual dystonia leading to death. Despite the fact that this disorder is caused by a mutation in one single gene, there is no cure. The mutant Huntingtin (mHtt) protein is expressed ubiquitously throughout the brain but frank cell death is limited to the striatum. Recent work has suggested that Rhes, Ras homolog enriched in striatum, which is selectively expressed in the striatum, may play a role in Huntington’s disease neuropathology. In vitro studies have shown Rhes to be an E3 ligase for the …
The Antisaccade Task: Visual Distractors Elicit A Location-Independent Planning 'Cost', Jesse C. Desimone
The Antisaccade Task: Visual Distractors Elicit A Location-Independent Planning 'Cost', Jesse C. Desimone
Electronic Thesis and Dissertation Repository
Prosaccades are rapid eye movements with direct stimulus and response relations and are designed to bring the fovea onto a target or area of interest. In contrast, antisaccades require the inhibition of a prosaccade and the evocation of a saccade to a target’s mirror-symmetrical location. Previous work has shown that a remote (i.e., midline, contralateral) – but not proximal (i.e., ipsilateral) – task-irrelevant distractor relative to a visual target delays prosaccade reaction times (RT) (i.e., remote distractor effect: RDE). To my knowledge, however, no work has examined whether antisaccade RTs are similarly influenced by a RDE. Accordingly, I sought to …
The Effects Of Mindfulness Meditation On Rumination In Depressed People, Rachel A. Sluder
The Effects Of Mindfulness Meditation On Rumination In Depressed People, Rachel A. Sluder
Honors Theses and Capstones
Mindfulness meditation is a practice of focus, awareness, and non-judgmental acceptance of one's thoughts (Deyo et al., 2009; Kenny et al., 2007). Rumination is a maladaptive pattern of thought that is common in people with depression and other mood disorders. It can lead to further episodes of depression, and can be very destructive in that way (Nolen-Hoeksema, 2008). This paper reviews several studies on mindfulness meditation, depression, and rumination, with a focus on certain areas and phenomena such as alpha asymmetry (Keune et al 2013) and gamma band activity (Berkovich-Ohana et al., 2012). Modalities such as fMRI and EEG are …
Sex Differences In Cell Death And Steroid Hormone Receptors In Cortical Explants, Amanda L. Trout
Sex Differences In Cell Death And Steroid Hormone Receptors In Cortical Explants, Amanda L. Trout
Theses and Dissertations--Physiology
Estrogens, such as the biologically active 17-b estradiol (E2) have many actions in the male and female brain. Not only does E2 regulate reproductive behavior in adults, it organizes and activates the brains of younger animals in a sex-specific manner. In addition, many human studies have shown E2 to provide protection against a variety of neurological disorders, including stoke. These studies have been controversial and depend largely on the type and timing of hormone replacement. Animal studies are much less controversial and clearly demonstrate a neuroprotective role for E2 following ischemic brain injury. Because much of E2 neuroprotection requires sex …
Blast-Induced Brain Injury: Influence Of Shockwave Components, Dexter V. Reneer
Blast-Induced Brain Injury: Influence Of Shockwave Components, Dexter V. Reneer
Theses and Dissertations--Neuroscience
Blast-induced traumatic brain injury (bTBI) has been described as the defining injury of Operations Enduring Freedom and Iraqi Freedom (OEF/OIF). Previously, most blast injury research has focused on the effects of blast on internal, gas filled organs due to their increased susceptibility. However, due to a change in enemy tactics combined with better armor and front-line medical care, bTBI has become one of the most common injuries due to blast. Though there has been a significant amount of research characterizing the brain injury produced by blast, a sound understanding of the contribution of each component of the shockwave to the …
Characterizing Purkinje Cell Responses And Cerebellar Influence On Fluid Licking In The Mouse, Jeri Lonece Bryant
Characterizing Purkinje Cell Responses And Cerebellar Influence On Fluid Licking In The Mouse, Jeri Lonece Bryant
Theses and Dissertations (ETD)
Rodents consume water by performing stereotypical, rhythmic licking movements which are believed to be driven by central pattern generating circuits located in the brainstem. Temporal aspects of rhythmic licking behavior have been shown to be represented in the olivo-cerebellar system in the form of population complex spike activity. These findings suggest that the olivo-cerebellar system is involved in the generating circuitry responsible for licking rhythm in rodents. However, the representation of licking in the simple spike activity of Purkinje cells and the consequences of loss of cerebellar function on licking behavior has not been quantified. I investigated the influence of …