Life Sciences Commons^™

Effects Of Adolescent Alcohol Binge Drinking On Prefrontal Myelin, Wanette M. Vargas-Rodriguez

Doctoral Dissertations

Alcohol binge drinking is highly prevalent in teenagers and is associated with various harmful health effects and social problems. During adolescence, brain regions such as the prefrontal cortex (PFC) are still undergoing active development, characterized by increases in white matter volume. While the morphological details and the cellular and molecular sequences governing adolescent white matter development are not fully known, it is known that this development process is sensitive and can be disrupted. Although consumption of alcohol in a binge drinking pattern has been linked to lower white matter integrity in humans, it is important to determine if alcohol is …

Brain Networks Supporting Literacy Development, Iris J. Broce

FIU Electronic Theses and Dissertations

The development of fluent reading requires coordinated development of key fiber pathways. While several fiber pathways have been implicated in reading, including the recently re-identified vertical occipital fasciculus (VOF), inferior longitudinal fasciculus (ILF), arcuate fasciculus and its 3 components, and inferior fronto-occipital fasciculus (IFOF), whether these fiber pathways support reading in young children with little to no exposure to print remains poorly understood. Consequently, over the course of three studies, the current dissertation aimed to narrow this research gap by addressing the following research questions: 1) Which fiber pathways support early literacy skill in young children 5-10 years old? 2) …

Pigment Dispersing Factor: Transcriptional Regulation And Its Role In Metabolism In Drosophila Melanogaster, Sudershana Nair

Doctoral Dissertations

Almost all living organisms have circadian clocks coordinating physiology and behavior, and an innate molecular clock drives rhythmic changes by integrating environmental and metabolic stimuli to generate 24 hour timing. Drosophila melanogaster has proved to be an excellent model organism with a well-characterized circadian clock and the neural circuits underlying clock have been intensely investigated. The neuropeptide pigment-dispersing factor (PDF) plays an essential role in maintaining circadian rhythmicity and synchronizes circadian clock neurons. However, the regulation of Pdf has been a black box with no known protein identified that directly regulates it, and its role in metabolism hasn’t been looked …

Funciones Sensoriales En Niños Menores De 3 Años Diagnosticados Con Trastorno Del Espectro Autista (Tea) / Sensory Processing In Toddlers Diagnosed With Autism Spectrum Disorder (Asd), Juliana Gutiérrez, Megan Chang, Erna Imperatore Blanche

Faculty Research, Scholarly, and Creative Activity

Spanish: Las dificultades de procesamiento sensorial en niños con Trastorno del Espectro Autista (TEA) están ampliamente descritos en la literatura principalmente mediante el uso de encuestas a padres y observaciones. Con menor frecuencia se han descrito las dificultades de procesamiento sensorial en niños menores de 3 años de edad que han sido posteriormente diagnosticados con TEA. Este studio retrospectivo está basado en 84 niños (28 diagnosticados con TEA, 28 con retraso en el desarrollo, y 28 niños con desarrollo típico) entre 18 y 36 meses de edad que asistieron a un programa de intervención temprana y cuyos padres completaron el …

Computational Modeling Of Facial Response For Detecting Differential Traits In Autism Spectrum Disorders, Manar D. Samad

Electrical & Computer Engineering Theses & Dissertations

This dissertation proposes novel computational modeling and computer vision methods for the analysis and discovery of differential traits in subjects with Autism Spectrum Disorders (ASD) using video and three-dimensional (3D) images of face and facial expressions. ASD is a neurodevelopmental disorder that impairs an individual’s nonverbal communication skills. This work studies ASD from the pathophysiology of facial expressions which may manifest atypical responses in the face. State-of-the-art psychophysical studies mostly employ na¨ıve human raters to visually score atypical facial responses of individuals with ASD, which may be subjective, tedious, and error prone. A few quantitative studies use intrusive sensors on …

Cuestionario De Proceso Sensorial En Adultos: Comparación De Resultados Entre Población De Usa Y De Chile: Resultados Preliminares/Sensory Processing Questionnaire In Adults: Comparison Of Results Between Usa And Chile Population: Preliminary Results, Silvia Gómez, Megan Chang, Dianne Parham, Erna Imperatore

Faculty Research, Scholarly, and Creative Activity

Spanish: Existen escasos estudios sobre la forma de evaluar el proceso sensorial en adultos; una de estas formas es el uso de perfil sensorial desarrollado por Brown y Dunn en el año 2002, aplicable tanto para la población infantil como adulta de habla inglesa. Hasta el momento no existe una evaluación de procesamiento sensorial del adulto validada en castellano. En base a estos antecedentes, el principal objetivo de este estudio es validar la construcción interna de una escala de procesamiento sensorial en el adulto a través del Cuestionario del Proceso Sensorial del Adulto (CPSA) con una población de habla hispana, …

The Role Of Daf-19 In Non-Ciliated Neurons: How Is Neural Development Regulated By Different Daf-19 Isoforms?, Zabdiel Ek Vazquez

Lawrence University Honors Projects

A degenerative disease-like phenotype, specifically reduction in synaptic protein levels in adult worms, is correlated with loss-of-function of the only RFX transcription factor gene, daf-19, in C. elegans. This gene encodes four known transcription factor isoforms, two of which are correlated with particular functions. The DAF-19C isoform activates genes responsible for cilia development, while DAF-19M is needed for cilia specification in males. A comparison of the transcriptome of daf-19 null and isogenic wild type adult worms suggests both positive and negative regulation of gene expression is correlated with the presence of DAF-19 proteins. We have assessed DAF-19 regulation …

The Effects Of Lipopolysaccharide-Induced Neuroinflammation On Learning And Forgetting In Juvenile Rats, Michele Barry

Seton Hall University Dissertations and Theses (ETDs)

The inability to remember events experienced very early in life is referred to as Infantile Amnesia (IA) and has been observed in both humans and animals. Over the years interest in the phenomenon waned, but has recently increased with the discovery of new neurobiological methods to study brain function (e.g., Callaghan, Li & Richardson, 2014). The neurobiological mechanism behind IA has yet to be determined, but several innovative theories have been developed with these new research methods. The neurogenesis hypothesis theorizes that increased neurogenesis during early development disrupts previously established memories. The hippocampus, an area that mediates both the memory …

Working Memory Impairments In Chromosome 22q11.2 Deletion Syndrome: The Roles Of Anxiety And Stress Physiology, Ashley F. P. Sanders

University of New Orleans Theses and Dissertations

Stress and anxiety negatively impact the working memory system by competing for executive resources. Broad memory deficits have been reported in individuals with chromosome 22q11.2 deletion syndrome (22q11.2DS). We investigated anxiety and physiological stress reactivity in relation to visuospatial working memory impairments in 20 children with 22q11.2DS and 32 typically developing children (M = 11.10 years, SD = 2.95). Results indicate reduced post-stress RSA recovery and overall increased levels of cortisol in children with 22q11.2DS. Additionally, anxiety mediated the relationship between 22q11.2DS and visuospatial working memory impairment. However, there was no indication that stress response physiology mediated this association. …

Alignment Of Neurochemically Defined Modules In Multimodal Aspects Of The Mouse Inferior Colliculus., Chris H. Dillingham

Senior Honors Projects, 2010-2019

Processing of sound requires precise coordination of various levels of the auditory system. Auditory reflexes and orientation behaviors require interactions with other systems and modalities, emphasizing the importance of highly organized integrative circuits. The inferior colliculus (IC) is a unique midbrain structure in that it exhibits aspects that are specifically arranged for processing auditory cues, as well as regions that handle multisensory inputs and thereby exhibit an entirely different organization. While the central nucleus of the IC (CNIC) is primarily auditory and arranged tonotopically, the lateral cortex (LCIC) is multimodal and exhibits a unique array of modular and extramodular fields. …

Acth Prevents Deficits In Fear Extinction Associated With Early Life Seizures, Andrew T. Massey, David K. Lerner, Gregory L. Holmes, Rod C. Scott, Amanda Hernan

Dartmouth Scholarship

Objective: Early life seizures (ELS) are often associated with cognitive and psychiatric comorbidities that are detrimental to quality of life. In a rat model of ELS, we explored long-term cognitive outcomes in adult rats. Using ACTH, an endogeneous HPA-axis hormone given to children with severe epilepsy, we sought to prevent cognitive deficits. Through comparisons with dexamethasone, we sought to dissociate the corticosteroid effects of ACTH from other potential mechanisms of action.

Results: Although rats with a history of ELS were able to acquire a conditioned fear learning paradigm and controls, these rats had significant deficits in their ability to extinguish …

Prenatal Exposure To Social Stress Alters Adult Behavior In Syrian Hamsters, Genna Jones

Georgia State Undergraduate Research Conference

No abstract provided.

Investigating Genetic Interactors Of Nejire, The Drosophila Melanogaster Creb-Binding Protein, Using Rna Interference, Joshua Lott

Georgia State Undergraduate Research Conference

No abstract provided.

Sex Differences In The Effect Of Prenatal Fluoxetine Exposure On Adult Aggression In Syrian Hamsters, Ryan J. Slaby Mr.

Georgia State Undergraduate Research Conference

No abstract provided.

Early Neurodevelopment: Notch Signaling, Axial Differentiation, Brain Patterning, And Neurogenesis, Adrian M. Bebenek '17

Independent Study

The vastly complex, delicate nature of the nervous system calls for a highly effective development system. The development of the nervous system begins early in embryogenesis and is one of the last systems to be completed after birth. Deemed to be one of the most important steps in the evolutionary progression towards sophisticated life, the pathways regulating neurodevelopment are highly specialized and conserved. Embryonic neurodevelopment is an important starting point for the understanding of brain anatomy, function, and its neurobiology. The past few decades have brought about numerous technological advancements allowing for the study of the earliest stages of embryonic …

Effects Of Vaccine Preservatives And Adjuvants On Childhood Neurodevelopment, Reut Raveh

The Science Journal of the Lander College of Arts and Sciences

Parental concerns about the safety of childhood vaccinations began in the 1990’s and continue until today. A primary concern of many parents is whether the adjuvants and preservatives added to the vaccines have the potential to cause neurodevelopmental disorders in young children. An overview of various studies was done to determine if thimerosal affects childhood neurodevelopment with studies suggesting that thimerosal potentially causes neurodevelopmental disorders. However, some studies suggest the opposite. As a result it is impossible to conclude whether thimerosal affects childhood neurodevelopment. However, measures should be taken to remove thimerosal from the childhood vaccination schedule. Additionally, the studies …

Cognitive Effects Of Breastfeeding, Abraham Englard

The Science Journal of the Lander College of Arts and Sciences

This paper explores the cognitive effects of breastfeeding through Intelligence Testing and Imaging Testing that compares IQ, success, and brain structure of individuals that were breastfed, formula fed, and both breastfed and formula fed. Intelligence studies available are widespread for all age groups and signify a causal relationship between breastfeeding and intelligence. However, imaging testing is not as extensive, but shows a strong correlation between cognitive development and breastfeeding. The mechanism of breast milk’s impact on cognitive development is at an exploratory phase, with a possibility that docosahexaenoic and arachidonic acids, along with other nutrients found in breast milk, contribute …

Excess Folic Acid As A Potential Competitor Of Glutamate May Interfere With Neural Development, Benjamin Fick

Honors Program Theses

Folic acid, Vitamin B9, is strongly advised as a supplement taken by pregnant woman to maintain the health of the embryo, and deficiency increases the risk of neural tube defects. However, a safe upper limit of folate to consume has not been established, and an excess of dietary folate may interfere with neurodevelopmental metabolism, increasing the risk of adverse outcomes, including autism spectrum disorder (ASD). It has been suggested that folate affects connectivity among neurons as the brain develops. Glutamate is important in the regulation of neural tissue development, as it is a common excitatory neurotransmitter that binds to synaptic …

Using Spiral Dynamic Theory For Adult Civic Engagement Research And Social Justice Education, Lisa R. Brown

Adult Education Research Conference

Empirical civic engagement research based in a South American context. Participants included adult learner populations engaged in revolutionary protests that opposed private for-profit education in Chile. Findings were higher order Spiral Dynamic Theory thinking at the for-profits and lower civic engagement.

Potential For Aerobic Exercise To Release Growth Factors To Induce Cognitive Changes In Children With Autism Spectrum Disorder, Maya Harrington

Undergraduate Research Posters

Autism Spectrum Disorder (ASD) is becoming increasingly prevalent among adolescents, and while the number of individuals diagnosed with the disorder grows, there continues to be no cure or even a clear treatment path for ASD. This study analyzes the biological stimulations that create cognitive changes—which are induced by intensive aerobic exercise—within the brains of individuals ages 8-18 diagnosed with autism. I studied journal articles on the current treatments available for ASD, the increasing prevalence of the disease, the cognitive alterations of the autistic brain relative to the brains of individuals without the disease, the release of growth factors due to …

Roles Of Planar Cell Polarity Proteins In Copa Axon Pathfinding, Ashley Morgan Purdy

Theses and Dissertations

In zebrafish, CoPA (Commissural Primary Ascending) is the first among ascending commissural axons to pathfind anteriorly and form the spinal commissure. One pathway that guides their anterior growth is the planar cell polarity (PCP) signaling pathway, but it is not fully known how PCP signaling regulates anterior guidance. We examined CoPA pathfinding in various PCP mutants to determine if anterior-posterior (A-P) guidance of CoPAs is dependent on PCP signaling. We found that certain PCP mutants exhibited anterior pathfinding defects, with approximately half of all affected CoPAs migrating incorrectly posteriorly. By using a translation-blocking DCC (Deleted in …