Nervous System Diseases Commons^™

Examining The Association Between Ddt Exposure And Parkinson’S Disease, Hodges Mccathern

Undergraduate Honors Theses

Dichlorodiphenyltrichloroethane, commonly known as DDT, was an organochlorine pesticide widely used in the mid-20th century. It is highly stable and resistant to degradation, leading to its long-term presence in the environment. This chemical bioaccumulates in ecosystems and in human tissue, particularly adipose tissue, raising concerns about chronic exposure. Emerging research links DDT exposure to adverse neurological outcomes, including increased risk for neurodegenerative disorders such as Parkinson’s Disease. Mechanistically, DDT and its metabolites may disrupt dopaminergic neurons, induce oxidative stress, and interfere with mitochondrial function, contributing to neurotoxicity. Understanding the environmental fate of DDT and its bioaccumulative properties is essential for …

The Effectiveness Of Ras Treatment In Improving Gait Patterns In Patients With Parkinson’S Disease: A Literature Review, Vivian Huang, Andrea Hunt, Alicia Chopyk

Rowan-Virtua Research Day

Parkinson’s Disease (PD) is a neurodegenerative disorder involving the loss of dopaminergic neurons leading to symptoms such as tremor and gait disturbance. This results in the classic shuffling gait: stooped posture, variation in stride length, variation in cadence, reduced gait velocity, inability to maintain a steady rhythm, and an increased fear of falling. This study’s objective is to review the current literature on the use of rhythmic auditory stimulation (RAS)Ⓡ as a treatment option for PD. Previous research has looked at RASⓇ as a potential non-pharmacologic treatment because researchers hypothesize that listening to music produces an external rhythm that the …

Mitochondrial Dysfunction And Parkinson's Disease: A Critical Link, Anika J. Millar

Senior Honors Theses

Parkinson’s disease is a neurodegenerative disorder, caused by the damage to and death of dopamine-releasing neurons in the brain. The substantia nigra is a major region housing dopaminergic neurons and plays a critical role in motor and cognitive function. When these neurons are compromised, dopamine levels decline, leading to the development of motor and cognitive dysfunction. Current treatments include dopamine precursors, which help to replace dopamine and relieve motor symptoms. However, while there is symptomatic treatment for Parkinson’s disease, there are no preventative therapies or cures. A potential link between mitochondrial dysfunction and Parkinson’s disease has prompted further research. Investigating …

Identifying Breathing, Swallowing, And Speech Biosignatures In Parkinson’S Disease Patients With Wearable Devices, Amanda Brandaris, Katherine Shishido, Rohaan Manzoor, Ethan Hampton, Karthik Jasty, Kelvin Guo, Anna Fish, Spencer Peterson, Ulrike H. Mitchell Phd, Phillip Sechtem Phd, Ccc-Slp, Paula Johnson Phd, Anton E. Bowden Phd, Miriam Cortez-Cooper Pt, Phd, Pamela I. Barney Msrt, Rrt, Ae-C, Nps, John A. Kriak Pharmd

Annual Research Symposium

No abstract provided.

Analyzing The Effectiveness Of Transcutaneous Auricular Vagus Nerve Stimulation On Parkinson’S Disease Related Gait Function: A Systematic Review And Meta-Analysis, Sami Dakhel, Jonathan Elias, Alexander King

Rowan-Virtua Research Day

Background: Those suffering from Parkinson’s Disease often experience a shuffling gait, alongside many other symptoms, due to the degradation of dopaminergic neurons in the substantia nigra. Transcutaneous auricular vagus nerve stimulation (taVNS) operates by non-invasively applying an electrical current to the cutaneous receptive field formed by the auricular branch of the vagus nerve in the outer ear. We sought to determine if taVNS would serve as a non-invasive alternative to addressing Parkinson’s related gait dysfunction.

Purpose: This systematic review and meta-analysis analyzes the effectiveness of taVNS on the reduction of gait dysfunction caused by Parkinson’s Disease.

Methods: The systematic review …

Sequence Learning In A 6-Ohda Mouse Model Of Parkinson’S Disease, Ani Gribbin

Neuroscience Honors Projects

Parkinson’s disease (PD), a neurodegenerative disorder originating in the dopaminergic cells of the basal ganglia, is characterized by severe motor impairments such as tremors, bradykinesia, and postural instability. However, non-motor symptoms impacting sensory systems and cognition are consistently pointed to as more greatly affecting quality of life for PD patients. Cognitive impairments in PD can include changes in reward processing, depression, apathy, and increases in risk-taking behavior. Additionally, learning and memory deficits are seen in PD, specifically in motor sequence learning. Often, the neural correlates of sequence learning impairments are traced to the substantia nigra. However, there is some evidence …

Dysbiosis In Parkinson's Disease: A Meta-Analysis Of Gut Microbiota And Its Role In Gastrointestinal Dysfunction And Disease Progression, Ayan M. Siddiqui Mr.

Honors Undergraduate Theses

Parkinson's Disease (PD) is a neurodegenerative disorder characterized by motor and nonmotor symptoms, including gastrointestinal (GI) dysfunction. Symptoms such as constipation, bloating, and nausea often show early signs before the onset of motor symptoms. Recent research has suggested an essential role of the human gut microbiome and gut dysbiosis, an imbalance in gut microbiota composition, in the pathogenesis of PD. This thesis aims to assess the potential relationship between gut dysbiosis and PD by conducting a meta-analysis, focusing on differences in gut microbiota between PD patients and healthy controls and evaluating their implications for GI dysfunction and PD progression. The …

Anatomical And Physiological Characterization Of Striatal Activation Of The Cerebral Cortex, Yuhan Wang

Theses and Dissertations (ETD)

Purpose. The striatum receives excitatory glutamatergic input from nearly all parts of the cerebral cortex, and its output is delivered by direct pathway medium spiny neurons (dMSNs) expressing D1 type dopamine (DA) receptors (D1Rs) and indirect pathway MSNs (iMSNs) expressing D2 DA receptors (D2Rs). Loss of DA results in the imbalance between the activities of dMSNs and iMSNs in Parkinson’s disease (PD), leading to ab-normal interactions between the cerebral cortex and striatum. Thus, understanding the inter-actions between the cortex and striatum is important. The monosynaptic corticostriatal cir-cuit has been extensively studied. In contrast, due to the poly-synaptic nature of the …

Paraquat, Parkinson's Disease, And Agnotology, Amit Ray, E. Ray Dorsey

Articles

This commentary examines the controversial relationship between paraquat, a widely used herbicide, and Parkinson's disease through the lens of agnotology—the deliberate production of ignorance for commercial gain. Despite numerous animal and epidemiological studies linking paraquat to Parkinson's disease, its use in the United States doubled from 2013 to 2018. The authors reveal how the manufacturer allegedly employed tactics similar to the tobacco industry, including attempts to discredit scientific researchers and suppress unfavorable findings. While over 30 countries have banned paraquat due to health risks, the EPA reauthorized its use in 2021. The paper argues that internal company documents and emerging …

Understanding Parkinson’S Disease Through Gait Initiation And Center Of Pressure, Mira Ananthanarayanan, Kiara Salceda, Michael Shiraishi, Rahul Soangra

Student Scholar Symposium Abstracts and Posters

Parkinson's disease is a neurological disorder that causes tremors and freezing of gait in diagnosed patients. Freezing of gait can be difficult to identify and intervene without laboratory based instruments data collection. Force plates have been proven to show viable results in identifying gait events such as heel contact and toe off. The complete gait cycle consists of a right-heel strike, right heel-to-toe shift, simultaneous right-toe off/left heel strike, left heel-to-toe shift, and a simultaneous left-toe off/right heel strike. This study will investigate center of pressure trajectories when initiating gait between healthy and Parkinson's participants. It is predicted that the …

Effects Of Exercise On Parkinson's Symptom Relief, Brooke Burnett

The Eleanor Mann School of Nursing Undergraduate Honors Theses

In this review of twenty research articles, the effects of moderate exercise therapy on the symptoms of Parkinson’s Disease will be explored. Appropriate literature was located using the research question, “In older adults with a Parkinson’s Disease Diagnosis, how does moderate exercise influence the symptoms of this disease?” Twenty peer-reviewed research articles were examined for the impact of different forms of exercise on various symptoms associated with Parkinson’s. Nineteen of the articles reviewed provide substantial evidence in support of exercise therapy as a treatment option for people with Parkinson’s, and one of the articles found inconclusive evidence neither in support …

Parkinson's Disease And Exercise: Steps Into A Hopeful Future, Jacob Barker

Spring Showcase for Research and Creative Inquiry

In the world of medicine and disease interventions, exercise is too often underlooked as a viable form of treatment or complementary treatment to medication. This is especially true with Parkinson’s Disease, a disease that attacks the basal ganglia of the brain and impairs neuromuscular function. In my analysis, I read a perspective from a PD patient, Gerry Hill, who has struggled with the disease himself and how he used physical activity to aid in his battle with the disease for both physical and psychological aid. Additionally, I performed research to understand how exercise benefits function within the brain. Aerobic exercise, …

Review: The Bidirectional Relationship Between Mitochondrial Respiratory Chain Inhibition And Import Machinery Malfunction In Parkinson’S Disease, Grace Riggs, Deepa Dabir

Honors Thesis

Parkinson’s Disease (PD) is characterized by a loss of dopaminergic neurons in the substantia nigra pars compacta (SNpc) portion of the ventral midbrain, the region of the brain largely responsible for motor control, executive cognitive function, and emotional limbic activity (Sonne 2020). SNpc dopaminergic neurons are more vulnerable than those in other regions due to their high energy demand arising from long, highly branched, unmyelinated axons (Pissadaki & Bolam 2013). They also have a higher basal rate of oxidative phosphorylation, which has been hypothesized to further increase vulnerability in cases of PD (Pacelli et al., 2015). One of the major …

Investigations On Novel Cyp26a1/B1 Inhibitor, Dx308: Using Atra Response As A Theraputic Target For Traumatic Brain Injury And Parkinson’S Disease, Jacob Morgan Leatherwood

Graduate Student Theses, Dissertations, & Professional Papers

Neurodegenerative diseases (NDs) take a wide spectrum of pathologies and have a tendency to present themselves later in life. Neurodegenerative diseases affect 6 million Americans annually with ~1 million currently living with Parkinson’s disease (PD). One of the greatest contributors to the pathogenesis of neurodegenerative diseases is the occurrence of a traumatic brain injury (TBI) during life.

All-trans-retinoic acid (atRA) is the active metabolite of Vitamin A. The retinoic acid pathway is known to be activated following TBI and is reduced in PD patients. Previous studies found a decrease in inflammation and behavioral deficits following administration of Vitamin …

Characterization Of Novel Animal Models For Parkinson’S Disease, Mohannad Almikhlafi

Theses & Dissertations

Parkinson’s disease (PD) is neurodegenerative disorder characterized by dopaminergic neuronal loss in the substantia nigra (SN) pars compacta. Mutations in DJ-1, PINK1 and Parkin lead to PD in humans; however, in mice, mutations or knockout of these genes do not lead to disease. Development of small animal models mimicking PD pathogenesis would enable better understanding of the disease. Here, we examined two approaches using laboratory rats. First, DJ-1 knockout rats have been reported to develop movement disorders and loss of neurons similar to human PD. Comprehensive analysis of mitochondrial proteomic alteration in isolated synaptic mitochondria from DJ-1 knockout rats using …

Protein Aggregates And Polyglutamine Tracts In Neurodegenerative Disease, John Mack

Senior Honors Theses

The incidence of neurodegenerative diseases such as Alzheimer's Disease, Parkinson's Disease, Huntington's Disease and other Polyglutamine Diseases is projected to dramatically increase throughout the developed world, and yet the pathology of these diseases remains poorly understood. One pathway that these neurodegenerative diseases share is the accumulation of pathologic proteins which are not only harmful in their soluble form but may go on to form toxic aggregates. In many cases, a consensus has yet to be reached concerning the mechanism for protein aggregation. Therefore, the exploration of the roles of these proteins and their possible mechanisms, along with potential techniques for …

Cell Specific Control Of The Pallidostriatal Pathway, Shubha Verma '19

Student Publications & Research

Parkinson’s Disease is a neurodegenerative disorder of the basal ganglia. The main cause for Parkinson’s Disease is the depletion of dopamine, a neurotransmitter. The basal ganglia contains four major nuclei: the substantia nigra, the subthalamic nucleus, the external globus pallidus, and the striatum. These nuclei communicate with each other by the use of neurons.

The Incidence Rate, Types, And External Causes Of Traumatic Brain Injuries In Parkinson’S Disease Patients In Nebraska 2008-2014, Maher Alsaadi

Capstone Experience: Master of Public Health

Background: Parkinson’s disease (PD) patients are at higher risk of traumatic brain injury (TBI) due to disease characteristics like tremor, bradykinesia, and impaired balance. Most of the studies that have been done in the United States to investigate the incident rate and causes of TBI among PD patients have mainly focused on falls, while none of these studies have thoroughly addressed all causes of TBI among the PD population or have used a population-based database. Our study aims to investigate the incidence rate, types, and external causes of TBI stratified by age of PD diagnosis using a population-based database from …

Critically Appraised Paper For “Effects Of Dance On Motor Functions, Cognitive Functions, And Mental Symptoms Of Parkinson’S Disease: A Quasi-Randomized Pilot Trial”, May Anne Gamueda, Caroline Lee, Susan Nguyen, Ajay Pala, Blanka Pentek, Kitsum Li

Occupational Therapy | Critically Appraised Papers Series

Parkinson’s disease (PD) is a systemic condition that presents not only motor but also nonmotor symptoms, as a result of dopamine deficiency in the basal ganglia. Rehabilitation typically focuses on motor deficits, however, despite the fact that nonmotor symptoms have a significant impact on quality of life. The researchers of this study investigated the effectiveness of dance on motor functions, cognitive functions, and mental symptoms of individuals with PD. They chose dance as their intervention because it has been shown to activate the basal ganglia as well as improve mood. In addition to motor function and mood, the researchers also …

Evaluation Of Immune-Modulating Therapies For Parkinson's Disease, Katherine E. Olson

Theses & Dissertations

Parkinson’s disease (PD) is the second most common neurodegenerative

disorder, second only to Alzheimer’s disease (AD). It is characterized by a

progressive loss of dopaminergic neurons along the nigrostriatal axis and the

formation of proteinaceous inclusions of alpha-synuclein (α-syn). Secondary to

the loss of dopaminergic neurons is a progression in motor and non-motor

symptoms. Motor symptoms are characterized by slowness in movement,

stiffness and tremor. Non-motor symptoms include depression, constipation,

sleep abnormalities and loss of sense of smell. The cause of disease remains

incompletely understood. However, age, genetics, environment, viral infection,

and interplay between the innate and adaptive immune system …

Does Exercise Reduce The Risk Of Falling In Parkinson’S Patients?, Michael J. Tansey

PCOM Physician Assistant Studies Student Scholarship

Objective: The objective of this selective EBM review is to determine whether or not exercise reduces the risk of falls in Parkinson’s patients

Study Design: Review of three English language randomized control trials (RCTs) published in 2003, 2007 and 2010.

Data Sources: 3 randomized controlled trials published after 1999 were obtained using Pubmed.

Outcomes Measured: The Allen study used a Parkinson’s disease fall risk scoring. The Ashburn study used patient dairies to record incidence of falls. The Hirsch study used Sensory Orientation testing assessing the trials resulting in falls.

Results: Allen et al and Ashburn et al found no significant …

A Machine Learning Approach To Diagnosis Of Parkinson’S Disease, Sumaiya F. Hashmi

CMC Senior Theses

I will investigate applications of machine learning algorithms to medical data, adaptations of differences in data collection, and the use of ensemble techniques.

Focusing on the binary classification problem of Parkinson’s Disease (PD) diagnosis, I will apply machine learning algorithms to a primary dataset consisting of voice recordings from healthy and PD subjects. Specifically, I will use Artificial Neural Networks, Support Vector Machines, and an Ensemble Learning algorithm to reproduce results from [MS12] and [GM09].

Next, I will adapt a secondary regression dataset of PD recordings and combine it with the primary binary classification dataset, testing various techniques to consolidate …

Binding Efficacy Of Different Polyphenolic Phytochemicals With Β-Lactoglobulin And Human Serum Albumin: Implication For Therapeutics Against Neurodegenerative Diseases, Rene Duran^, Andres Ortiz^, Mahesh Narayan*, Vladik Kreinovich*

COURI Symposium Abstracts, Spring 2012

No abstract provided.