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Articles 1 - 8 of 8
Full-Text Articles in Congenital, Hereditary, and Neonatal Diseases and Abnormalities
Numerical Investigation Of Subglottal Stenosis Effects On Human Voice Production, Dariush Bodaghi
Numerical Investigation Of Subglottal Stenosis Effects On Human Voice Production, Dariush Bodaghi
Electronic Theses and Dissertations
This dissertation aimed to advance knowledge of how subglottal stenosis impacts voice production physiology. An in-house fluid-structure-acoustic interaction approach based on the hydrodynamic/acoustic splitting technique was employed. This technique was rigorously verified for simulating phonation by matching the acoustic behavior to a compressible flow solver for phonation-relevant geometries. Simulations of an idealized 2D vocal tract model demonstrated the effects of supraglottal acoustic resonance on vocal fold kinematics and glottal flow waveform. Results showed that the acoustic coupling between higher harmonics and formats generated pressure oscillations, modifying vocal fold dynamics and glottal flow rate.
A major novelty was the incorporation and …
Muscle Defects Lead To Skeletal Deformities In A Zebrafish Model Of Distal Arthrogryposis, Emily A. Tomak
Muscle Defects Lead To Skeletal Deformities In A Zebrafish Model Of Distal Arthrogryposis, Emily A. Tomak
Electronic Theses and Dissertations
Distal Arthrogryposis Type 1 (DA1) involves mild muscle weakness and limb skeletal abnormalities thought to be caused by paralysis in utero. Why the limbs are particularly affected in DA1 and the degree of paralysis that leads to these skeletal deformities in utero remains unclear. Several muscle genes are known to cause DA1, including MYLPF (myosin light chain phosphorylatable), which encodes a myosin light chain protein that binds close to the force-generating head of myosin heavy chains. The zebrafish mylpfa-/- mutant displays a phenotype consistent with DA1, including impaired myosin activity, reduced muscle force overall, and complete fin paralysis. I …
Primary Cilia Of The Cardiac Neural Crest & Hedgehog-Mediated Mechanisms Of Congenital Heart Disease, Lindsey A. Fitzsimons
Primary Cilia Of The Cardiac Neural Crest & Hedgehog-Mediated Mechanisms Of Congenital Heart Disease, Lindsey A. Fitzsimons
Electronic Theses and Dissertations
Elimination of primary cilia in cardiac neural crest cell (CNCC) progenitors is hypothesized to cause a variety of congenital heart defects (CHDs), including atrioventricular septal defects, and malformations of the developing cardiac outflow tract. We present an in vivo model of CHD resulting from the conditional elimination of primary cilia from CNCC using multiple, Wnt1:Cre-loxP, neural crest-specific systems, targeting two distinctive, but critical, primary cilia structural genes: Intraflagellar transport protein 88 (Ift88) or kinesin family member 3A (Kif3a). CNCC loss of primary cilia leads to widespread CHD, where homozygous mutant embryos (MUT) display a variety of outflow tract malformations, septation …
The Educational Needs Of Children Ages 0-5 Born With Neonatal Abstinence Syndrome In Maine, Julia Casey
The Educational Needs Of Children Ages 0-5 Born With Neonatal Abstinence Syndrome In Maine, Julia Casey
Honors College
The goal of this study is to better understand the educational needs of children born with neonatal abstinence syndrome (NAS) in Maine. This study will consider two questions. First, what is currently being done to help children born with NAS in Maine? To answer this question, I looked into previous studies that evaluate the needs of children born with prenatal drug exposure. I also looked into Maine’s Strategic Action Opioid Plan to determine what initiatives the state is taking towards helping these children. Second, what should Maine be doing to help the children born with NAS? To answer this question, …
Characterization And Functional Rescue Of Congenital Muscular Dystrophy With Megaconial Myopathy In A Mouse Model Of The Disease, Ambreen A. Sayed
Characterization And Functional Rescue Of Congenital Muscular Dystrophy With Megaconial Myopathy In A Mouse Model Of The Disease, Ambreen A. Sayed
Electronic Theses and Dissertations
Congenital muscular dystrophy with megaconial myopathy (MDCMC) is an autosomal recessive disorder characterized by progressive muscle weakness and wasting. Megamitochondria in skeletal muscle biopsies and cognitive impairments in MDCMC patients are observations exclusive to this type of muscular dystrophy. The disease is caused by loss of function mutations in the choline kinase beta (CHKB) gene which results in dysfunction of the Kennedy pathway for the synthesis of phosphatidylcholine (PC). A rostro-caudal muscular dystrophy (rmd) mouse with a deletion in the Chkb gene resulting in MDCMC-like symptoms has been reported by our lab. In order to test if the rmd mice …
Genetic Modification Of Inherited Retinopathy In Mice, Yang Kong
Genetic Modification Of Inherited Retinopathy In Mice, Yang Kong
Electronic Theses and Dissertations
The retina, as a critical component of the sensory system, consists of multiple cell types, of which, photoreceptors play a key role in receiving, integrating and transmitting light signals. The biofunctions of photoreceptors rely on their proper growth and development, which is predominantly governed by a cluster of molecules that comprise the transcriptional regulation for photoreceptor development. Any disruption of these molecules potentially incurs retinal pathologies.
It is known that deficiencies of nuclear receptor subfamily 2 group E member 3 (NR2E3) or neural retina leucine-zipper (NRL), two molecules in regulating photoreceptor cell development, cause photoreceptor dysplasia. In a sensitized chemical …
Expression Profiling Of Non-Coding Rna By Environmental Interactions In Innate Immunity, Jacob R. Longfellow
Expression Profiling Of Non-Coding Rna By Environmental Interactions In Innate Immunity, Jacob R. Longfellow
Electronic Theses and Dissertations
Cystic fibrosis (CF) is a genetic disorder that affects 30,000 people in the United States and currently has no cure. Although CF affects all of the body’s systems, it is largely characterized as a lung disease. CF is caused by a mutation in both copies of the gene for cystic fibrosis transmembrane conductance regulator (CFTR). A mutation in the CFTR gene leads to improper movement of chloride ions and water into the airways, which dysregulates the airway surface liquid volume and composition. Individuals with CF are prone to lung infections due to inefficient bacterial clearance and by the age of …
Examining The Role Of Specific Virulence Mechanisms During Pseudomonas Aeruginosa Infection In A Zebrafish Model Of Cystic Fibrosis, Ryan T. Phennicie
Examining The Role Of Specific Virulence Mechanisms During Pseudomonas Aeruginosa Infection In A Zebrafish Model Of Cystic Fibrosis, Ryan T. Phennicie
Electronic Theses and Dissertations
Cystic fibrosis (CF) is the most common lethal hereditary disease. CF is caused by recessive mutations in the Cystic Fibrosis Transmembrane Conductance Regulator (CFTR) gene and is associated with multi--organ defects resulting from improper ion transport across epithelial membranes. Chronic lung infection by the environmentally ubiquitous opportunistic human pathogen Pseudomonas aeruginosa and the subsequent hyperinflammation that occurs as the host immune system combats the bacterium cause substantial morbidity and mortality in CF. Despite numerous studies that have sought to elucidate the role of CFTR in the innate immune response, the links between CFTR, innate immunity, and P. aeruginosa infection remain …