Neuroscience and Neurobiology Commons^™

Disrupted Nuclear Function And Nucleocytoplasmic Transport In Parkinson’S Disease, Ichiro M. Matoba

The Cardinal Edge

No abstract provided.

The Sentience Of The Horse And The Philosophy Of Natural Horsemanship: Implications For Hrd Leadership, Rob E. Carpenter

Human Resource Development Faculty Publications and Presentations

This paper advances a biologically grounded philosophy of leadership through the lens of Natural Horsemanship. It reframes leadership as an embodied, sentient process rather than a purely cognitive or behavioral construct. Drawing from neuroscience, affective biology, sociology, and human resource development (HRD), it proposes that the horse–human relationship provides a living model for relational intelligence. The horse’s exquisite attunement to human emotion—mediated through limbic regulation and bio-behavioral synchrony—reveals that influence arises not from authority but from coherence. Leadership, like horsemanship, is a reciprocal act of co-regulation in which trust, safety, and communication are revealed through physiology before language. By examining …

Circuit And Synaptic Mechanisms Of Methamphetamine Induced Cognitive Deficits During Abstinence: Roles Of The Perirhinal-Prefrontal Pathway And The Nucleus Reuniens, Sarah Goldsmith

MUSC Theses and Dissertations

Cognitive deficits during abstinence are a hallmark of methamphetamine (meth) use and indicative of negative treatment outcomes. In rats, both long access meth self-administration and meth binge produce recognition memory deficits due to drug-induced plasticity within the perirhinal cortex (PRH). PRH projections are numerous and include the medial prefrontal cortex (mPFC) and the Nucleus Reuniens (NRe). In the first study, the role of the PRH-mPFC reciprocal circuit in novel object recognition memory was investigated by infusing an rgAAV encoding GFP-tagged Cre recombinase into the PRH or the mPFC. Following surgery, rats explored objects. During exploration, PRH neurons receiving input from …

Ferroptosis As A Pathological Driver In Niemann-Pick Disease Type C, Kayla Linda Sanchez

Loma Linda University Electronic Theses, Dissertations & Projects

Niemann–Pick Disease Type C (NPC) is a hereditary neurodegenerative disease characterized by selective cell vulnerability, particularly affecting cerebellar anterior Purkinje neurons. These neurons exhibit a distinctive pattern of degeneration due to the loss of NPC1 and/or NPC2 protein function, progressively extending towards posterior cerebellar regions. Historically, research has described NPC as a disorder of intracellular cholesterol handling; however, cholesterol-lowering therapies have not effectively prevented neurological deterioration, and the mechanisms underlying selective neuronal vulnerability remain unclear. Ferroptosis, previously referred to as oxytosis, is a regulated form of cell death driver by iron-induced lipid peroxidation. It has been implicated in several neurodegenerative …

Situation Mouse All Floxed Up: Exploring Phenotypic Abnormalities In Bdnf Floxed Mice, Marissa A. Burkman

All NMU Master's Theses

Animal research is a contentious topic in both the scientific and general communities.  It is essential that our animal models accurately and predictably depict intended phenotypes, necessitating careful colony monitoring and maintenance.  Volunteer animal staff in the Ottem Laboratory became concerned when mice with LoxP sites flanking the BDNF gene depicted anxiety-like behaviors such as aggression, difficulty handling, and increased agitation.  Though many studies have noted behavioral and phenotypic abnormalities related to large gene inserts, few have noted abnormalities with small gene inserts such as the 34 bp LoxP site.  Brandt (2018) performed a three-stage behavioral protocol on these mice …

Increased Neuronal Activity Restores Circadian Function In Drosophila Models Of C9orf72-Als/Ftd, Sho Inami, Benjamin P. Jenny, Oghenerukevwe Akpoghiran, Sara I. Gallagher, Alexandra K. Strich, Ayako Tonoki, Davide Trotti, Aaron R. Haeusler, Kyunghee Koh

Farber Institute for Neuroscience Faculty Papers

Circadian rhythm disruptions are common across neurodegenerative diseases, but their link to amyotrophic lateral sclerosis (ALS) and frontotemporal dementia (FTD) remains unclear. The C9orf72 hexanucleotide repeat expansion is the most prevalent genetic cause of ALS/FTD. Here, we used Drosophila models expressing pathogenic arginine-rich dipeptides (PR or GR) or GGGGCC hexanucleotide repeats to investigate circadian deficits in C9orf72-ALS/FTD. We found that circadian rhythmicity and period length were altered in a repeat number-, dosage-, expression pattern-, and age-dependent manner. Additionally, we observed lower levels of the neuropeptide PDF, a key regulator of free-running circadian rhythms, as well as decreased projection complexity and …

Cerebral Documents And Algorithmic Sensemaking: Searching For Expressions In Human And Artificial Cognitive Collaborations, Rebekah L. Cowell

Proceedings from the Document Academy

Generative Artificial Intelligences (AIs) and current advanced large language models (LLMs) are algorithmically designed to generate text-based conversations as conversational agents (CAs), by replicating human language and conversational communication. Pairing human cognition with generative computationally coded cognition. We have never been here before: cerebral and artificial information collaborations and processing producing expressions that may or may not become visible as second-hand/secondary source documents.

Sensemaking or sense(un)making is a unique autonomous human drive cognitively, our information processing is sensemaking in action and expressions and articulations are evidence of the sensemaking cycle. Documentation [expressed or articulated through various mediums] are a product …

Itbs Stimulation Of The Bilateral Ifg/Ipl Alters The Oscillatory Pattern In Asd, Mitra Assadi, Reza Koiler, Ryan Ally, Richard Fischer, Rod C. Scott

Farber Institute for Neuroscience Faculty Papers

BACKGROUND: Autism Spectrum Disorder (ASD) is a neurodevelopmental condition characterized by impairments in social communication, reciprocity, and adaptive behavior. Converging neurobiological evidence suggests that these clinical features arise from aberrant connectivity and dysregulated neuronal oscillations across distributed brain networks. In particular, dysfunction within the mirror neuron regions, concentrated in the inferior frontal gyrus (IFG) and inferior parietal lobule (IPL), has been implicated in deficits of imitation, empathy, and social cognition in ASD. Non-invasive neuromodulation using repetitive transcranial magnetic stimulation (rTMS) has shown modest behavioral benefits in ASD. However, most studies apply the conventional protocols targeting the dorsolateral prefrontal cortex. The …

Obesity Does Not Significantly Impact Clinical Outcomes Following Anterior Cervical Discectomy And Fusion, Ishan Shah, Alejandro Perez-Albela, Riya Shah, Charles Furlong, Puru Sadh, John Czerwein, Alan Daniels, Bryce A Basques

SKMC Student Presentations and Publications

BACKGROUND: With obesity rates rising among patients undergoing anterior cervical discectomy and fusion (ACDF) and more procedures shifting to outpatient settings, this study aimed to evaluate the impact of body mass index (BMI) on complications, sagittal alignment, and patient-reported outcomes (PROs).

METHODS: A prospectively maintained database of 302 patients who underwent ACDF for myelopathy or radiculopathy between 2020 and 2022 at a single academic center was analyzed. Patients were stratified into four BMI categories: normal (18.5-< 25), overweight (25-< 30), obese class I (30-< 35), and obese class II/III (≥35). Collected data included demographics, comorbidities, perioperative variables, radiographic measures (cSVA, Cobb angle, etc.), and PROs (VAS, NDI). Univariate regression compared demographics, alignment, and PROs, while multivariate analyses assessed complications and perioperative factors.

RESULTS: BMI was not independently associated with higher rates of postoperative complications, including adjacent segment disease, subsidence, reoperation, or other adverse events. Patients in …

Local Angiotensin Converting Enzyme 2 (Ace2) Enzymatic Activity Modulates Cholinergic Interneuron Function In The Dorsolateral Striatum, Aria R. Walls

Dissertations, Theses, and Capstone Projects

The renin angiotensin system (RAS) is an ancestrally ancient peptidergic signaling pathway best known for its role regulating blood pressure in the periphery. However, its presence and importance in the central nervous system has more recently been identified and is less well understood. Previous work shows RAS is expressed in the nigrostriatal pathway of the basal ganglia and has been implicated in basal ganglia disorders including Parkinson’s disease (PD) and levodopa-induced dyskinesia (LID). Interestingly, the canonical and noncanonical arms of the RAS pathway produce opposite effects on PD disease vulnerability and progression. The shift from the neurodegenerative canonical RAS to …

Somatosensory Cortex Responses To Illusory Touch In A Visual-Tactile Integration Task, Aditi Surendra Pawar

Dissertations, Theses, and Capstone Projects

Perceptual illusions arising from multisensory integration reveal how the brain constructs subjective experience from sensory input, and provide a powerful means of allowing the investigation of neural processes that track perceptual interpretation rather than physical stimulation alone. While visual illusions induced by auditory or tactile stimuli have been fairly well studied, the neural mechanisms underlying visually-induced illusory touch remain unclear. This study investigated whether illusory tactile perception engages the somatosensory cortex in a manner similar to veridical touch. Twenty healthy adults participated in an event-related functional magnetic resonance imaging (fMRI) study while performing a tactile numerosity judgment task. Each trial …

Less Self, Less Fear: Manipulation Of The Self Using Virtual Out-Of-Body Experiences To Alter The Conscious And Unconscious Experience Of Emotion, Dillon Freed

Dissertations, Theses, and Capstone Projects

This study investigated whether adopting an out-of-body perspective in virtual reality (VR) reduces subjective and physiological emotional responses to vicarious pain stimuli compared to inhabiting a first-person embodied avatar. Twenty-four participants experienced two counterbalanced VR conditions: (1) Avatar Embodiment (AV), in which they inhabited a photorealistic avatar from a first-person perspective, and (2) a Virtual Out-of-Body Experience (vOBE), in which they observed their avatar from a displaced third-person perspective. In both conditions, participants viewed a standardized series of vicarious pain images while electrodermal activity was recorded and self-report measures of embodiment (AV) and disembodiment (the vOBE state), emotional intensity (a …

How To Search For The Engram: Optogenetics And Network Dynamics, Claudia Garcia Jou

Dissertations, Theses, and Capstone Projects

Memories are thought to be encoded by ensembles of neurons called "engram cells", because their artificial activation with optogenetics leads to the behavioral expression of a memory. However, the physiological mechanisms that mediate this process remain unknown. In this thesis, I investigate how optogenetic stimulation of memory-tagged cells changes neuronal firing, spatial coding, and the geometry of neural manifolds. I used an active place avoidance task and a foraging task to label engram cells in the dorsal hippocampus with Channelrhodopsin2 (ChR2). I then recorded the hippocampal activity response to optogenetic stimulation in mice under anesthesia, head-fixed, or freely moving. I …

Humanity Is Evolving Its Consciousness: The Role Of Archetypal Energies As Guides During An Unfolding Weeding Out And Alignment Process, Carroy U. Ferguson

Psychology Faculty Publication Series

Humanity is evolving its consciousness at individual and collective levels.  Given these seemingly tumultuous times, as of this writing (January 2026), to make such a statement may sound like a strange thing to say.  However, I suggest that if you are alive today and if you are reading these words, these are the very times for which you were born—to assist Humanity as it evolves its consciousness with your unique gifts, whatever they may be.  That is, this period of our individual and collective human being-ness may be characterized as an unfolding period of weeding out and alignment with the …

An Impact Assessment Of The Effectiveness Of Utilizing Informal Health Communication Interventions To Spread Health Recommendations And Change Public Perception, Lina Mohamed Ezzat Ahmed Abdel Mawgoud

Theses and Dissertations

Brain health is an increasingly urgent but critically under-addressed public health priority in Egypt and the wider MENA region. Despite its centrality to aging, productivity, and overall quality of life, public understanding of brain health remains limited, and stigma continues to shape responses to dementia and cognitive decline. This study evaluates the effectiveness of informal, culturally adapted health communication as a tool to shift perception, increase awareness, and promote behavior change among non-medically trained adults in Egypt.

Grounded in global evidence on cognitive reserve, neuroplasticity, and the life-course approach to brain health, the intervention translated expert-informed brain health recommendations into …

Wavelet-Based Mechanomyographic Intensity Responses To Sustained Tasks Anchored To Low Versus High Ratings Of Perceived Exertion, Dolores G. Ortega, Robert W. Smith, Jocelyn E. Arnett, Tyler J. Neltner, Trevor D. Roberts, Justin S. Pioske, Richard J. Schmidt, Terry J. Housh

Journal for Sports Neuroscience

Purpose: This study examined the effects of sustained, isometric forearm flexion tasks anchored to ratings of perceived exertion of 2 (RPE2_FT) versus 8 (RPE8_FT) on the wavelet-based mechanomyographic (MMG) intensity responses from pretest and posttest maximal voluntary isometric contractions (MVICs) as well as the time course of changes in the MMG intensity responses throughout the sustained tasks. Methods: Eleven men (mean±SD: age=20.9±2.3 yrs) performed MVICs before and after the sustained tasks. The wavelet analyses decomposed the MMG signals onto a set of 11 wavelet bands (WBs). Repeated measures ANOVAs were used to analyze the MMG intensity …

Brain Gains: A Review Of Remediation Treatment Strategies Using Exercise Following Traumatic Brain Injury, Jessica Smith, Kristin Biggins, Loriann Helgeson

The Open Journal of Occupational Therapy

In this Opinions in the Profession article, we explore remediation treatment strategies using exercise for recovery from post-traumatic brain injury and aim to justify the use of such treatment in the occupational therapy profession to increase skills for functional gain. Common treatment strategies used by occupational therapists after brain injury are compensatory strategies, indicating the client learns a new way to perform the task. Though effective, it is also necessary to consider how remediation and neuroplasticity are essential. Teaching new approaches to complete tasks results in functional gains; however, focusing on foundational skills using exercises to relearn motor patterns to …

The Role Of Extracellular Vesicles As Diagnostic Tools In Gut-Brain Axis Disorders, Patricia Marçal Da Costa, Paulo Iury Gomes Nunes, Gabriella Cunha Vieira Ciurleo, José Wagner Leonel Tavares Junior, Pedro Braga Neto, Ludmila Belayev, Reinaldo Barreto Oriá

School of Graduate Studies Faculty Publications

The gut–brain axis represents a dynamic two-way signaling network whose dysregulation has been implicated in a wide range of neurogastrointestinal disorders. In this context, extracellular vesicles (EVs) have emerged as critical mediators of intercellular signaling and as promising non-invasive biomarkers. Derived from host and microbial cells, EVs carry bioactive cargo—including proteins, lipids, nucleic acids, and metabolites—that reflect the physiological or pathological state of their cells of origin. Their ability to cross biological barriers, such as the blood–brain barrier, underscores their potential for diagnosing and monitoring gut–brain axis dysfunctions. In this mini-review, we integrate microbial and brain-derived EVs within the framework …

Glial Cytokine Modulation Improves Sleep And Circadian Disruption In Female Saa Knock-In Mice Of Alzheimer’S-Related Pathology, Teresa Macheda, Margaret R. Hawkins, Carrie E. Johnson, Madison G. Lapid, Haleigh R. Whitlock, Savannah M. Shepard, Makayla F. Cox, Kelly N. Roberts, Leke Bytyqi, Heather M. Hash, Omar A. Abou El-Ezz, Mohammed Abou El-Ezz, Katharina Kohler, Sridhar Sunderam, Bruce F. O'Hara, Linda J. Van Eldik, Michael Paul Murphy, Marilyn J. Duncan, Adam D. Bachstetter

Neuroscience Faculty Publications

Introduction: Sleep and circadian disturbances are early Alzheimer's disease (AD) features, yet mechanisms linking amyloid pathology, neuroinflammation, and sex differences remain unclear.

Methods: We longitudinally assessed sleep, circadian rhythms, and cognition in female and male hAPP^SAA knock-in and control mice from 2 to 19 months using piezoelectric monitoring. Aged mice (15 months) received MW151, a glial cytokine inhibitor (2.5 mg/kg, every other day, 6 weeks).

Results: Only females exhibited midlife reductions in light-phase sleep, increased rhythm fragmentation, and reduced rhythm stability, coinciding with selective reversal learning deficits, effects independent of amyloid or cytokine burden. MW151 increased light-phase sleep and …

From Fog To Function: An Occupational Therapist's Guide To Evaluating And Treating Cancer-Related Cognitive Impairments, Lauren E. Toner

Entry-Level Occupational Therapy Doctorate - Doctoral Capstone Symposium

Cancer – related cognitive impairment (CRCI) is a common side effect of cancer treatment that interferes with cancer survivors’ occupational performance, independence, and quality of life. Despite its high prevalence, CRCI remains under recognized and inconsistently addressed within oncology care. About 70% of individuals diagnosed with cancer report cognitive changes during or after treatment, yet many do not receive treatment. Occupational therapists are clinically trained to evaluate and treat functional cognition, activities of daily activities, instrumental activities of daily living, and client centered goals, positioning them as key providers in addressing CRCI. However, limited occupational therapy specific resources have hindered …

Planaria Dugesia Japonica As A Model Organism For Measuring The Toxicity Of Environmental Contaminants Per- And Poly-Fluoroalkyl Substances (Pfas), Caitlyn Rodeo

Behavioral Neuroscience Honors Papers

A group of synthetic chemicals, per- and poly-fluoroalkyl substances (PFAS) are ubiquitous in the environment and have significant detrimental effects on physiology and behavior. Planaria have recently increased in popularity as a model for toxicology and regeneration research. These organisms possess a primitive centralized nervous system that is thought to be more similar to the vertebrate brain than to other invertebrate brains in terms of structure and function, and possesses the same neuronal subpopulations and neurotransmitters as the mammalian brain. While other studies have investigated the behavioral effects of perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS) on planaria, there is …

Music, Eeg And Stress: Connections Between Music And Electroencephalographic Patterns And The Mediation Of Physiological And Psychological Stress, Alexa Warren

Behavioral Neuroscience Honors Papers

The interrelation between music and the brain is an evolving interdisciplinary interest within neuroscience research. Relying on the capacity of music to elicit emotional and physical responses, as well as scientific principles like entrainment, this area of research explores the potential for utilizing targeted music as a holistic non-pharmacological therapeutic intervention. This is often executed via musical entrainment, which is the basis for this study. Utilizing a complex, yet elegant design, this research incorporates a cross disciplinary approach into a randomized controlled study bridging science and the arts. The purpose of this study is to expand this body of knowledge …

Expectancy Effects On Mental Fatigue, Ethan Li

Behavioral Neuroscience Honors Papers

This thesis explores mental fatigue as a state arising from sustained cognitive demand and explores the use of the gradual-onset performance task (gradCPT) for mental fatigue research. The study examines whether expectancy effects (placebo or nocebo conditions) influence mental fatigue-related outcomes. Expectancy effects were induced by asking participants to view an inert optical illusion after describing its benefits (placebo) or harms (nocebo) to mental fatigue. Out of 73 participants, results showed significant decreases in performance over time, along with significantly increased subjective fatigue as measured by the VAS-F subscale, supporting gradCPT as an effective fatigue inducer in short periods of …

Beyond Ssris: Omega-3 Fatty Acids And The Neurobiology Of Impulsivity In Borderline Personality Disorder, Sujean Doo

Scripps Senior Theses

Impulsivity is a central and clinically significant dimension of Borderline Personality Disorder (BPD), and is strongly associated with self-harm, aggression, and suicide risk. Despite its prognostic importance, pharmacologic management of impulsivity in BPD remains inconsistent. Selective serotonin reuptake inhibitors (SSRIs) are frequently prescribed; however, randomized controlled trials demonstrate limited efficacy for impulsive-aggression, and some patients experience a paradoxical behavioral activation. Meta-analytic and systematic reviews further suggest that mood stabilizers and second-generation antipsychotics may outperform antidepressants, yet no specific medication is indicated to target impulsive behavioral dyscontrol.

This thesis synthesizes findings from systematic reviews, randomized trials, and neuroimaging research to evaluate …

The Complexities Of The Bilingual Advantage, Melisa Sierra

Behavioral Neuroscience Honors Papers

The bilingual advantage hypothesis, which proposes an enhancement of executive functions in bilinguals, remains heavily debated with inconsistent findings across studies. This study investigated working memory performance in bilingual and monolingual young adults using a modified n-back task with an interruption while recording EEG activity. Participants completed 1-back, 2-back, and 3-back conditions across the pre-interruption phase and a post-break 2-back condition. Behavioral measures (accuracy and response times) were analyzed alongside ERP, focusing on P300 and sustained activity components, were analyzed. Results showed a decrease in accuracy as task difficulty increased from 1-back to 3-back, indicating the expected effects of higher …

Preserved Artificial Grammar Learning In Individuals With Parkinson’S Disease: A Systematic Review, Sarah I. Cranna

Honors Theses and Capstones

Abstract

            Implicit statistical learning is a crucial cognitive function that is highly involved in the learning and processing of language. Since both language and implicit statistical learning are supported by the basal ganglia through cortico-striatal networks, disruptions to this network could result in their impairment. Parkinson’s Disease (PD) can therefore be used to model disruptions to this system as it is primarily characterized by dysfunction in the basal ganglia. Thus, this review aims to examine the current literature studying the performance of individuals with PD on artificial grammar tasks in order to investigate the impact of impaired basal ganglia function …

Stress And Reward Interactions In Substance Use Disorder: An Evolutionary Mismatch Framework, Nicholas L. Castrucci

Honors Theses and Capstones

Substance use disorder (SUD) is a major public health concern characterized by compulsive substance use despite adverse consequences. While contemporary models emphasize biological, psychological, and environmental contributors, stress- and reward-related systems are often examined in isolation. This review integrates these systems within an evolutionary mismatch framework to examine how chronic stress exposure and repeated substance use increase vulnerability to addiction. Stress and reward systems are evolutionarily conserved but may become chronically dysregulated under modern conditions characterized by persistent psychosocial stressors and highly potent rewarding stimuli. This is associated with converging neuroadaptations across stress and reward circuitry, resulting in altered affective …

Silver Nanoparticle-Induced Disruption Of Astrocytic Morphology And Synaptic Microarchitecture In Rat Brain, Elli Williams

Theses, Dissertations and Capstones

Silver nanoparticles (AgNPs) are widely incorporated into consumer and medical products due to their antibacterial properties, increasing the potential for chronic exposure. AgNPs can be released into the environment, enter the body through ingestion or inhalation, cross the blood-brain barrier (BBB), and bioaccumulate in brain tissue. Previous in vitro studies demonstrate that AgNP exposure disrupts cytoskeletal organization and induces neurite collapse in neural cells, suggesting vulnerability of cytoskeleton-dependent structures in vivo. Astrocytes, through their perisynaptic astrocytic processes (PAPs) and perivascular endfeet, play critical roles in maintaining synaptic and neurovascular architecture, both of which rely heavily on cytoskeletal integrity. This …

Rna-Sequence-Driven Identification Of Differentially Expressed Genes In Α-Crystallin-Deficient Zebrafish, Kehlie Hopper

SPARK Symposium Presentations

Fetal Alcohol Syndrome (FAS) is a condition that develops in infants when exposed to alcohol in utero, leading to physical impairments such as reduced eye size and disrupted retinal function. Alpha-crystallin A is a key structural protein required for proper lens development and maintenance of transparency, while Alpha-crystallin B plays a protective role against cellular stress during eye development. In this study, I compared AB wild-type (ABWT), αA-crystallin knockout (cryaa), and αB-crystallin knockout (cryaba) zebrafish to investigate how the loss of these proteins influences eye development under ethanol exposure. The cryaa mutants exhibited reduced eye size even under control conditions, …

Perinatal Inflammation And Oxidative Stress Alter Adult Rat (Rattus Norvegicus) Motor Behavior, Alexander Young

Honors College Theses

Recent evidence in comparative animal models suggests that early life exposure to elevated inflammation (via LPS exposure) and oxidative stress (via acetaminophen exposure) may synergistically interact to alter typical neurodevelopmental trajectories, resulting in lasting effects on both behavior and gut-brain neurochemistry. The current study observed emotional and motor behaviors and collected fecal-boli to measure Tyrosine (TE) levels in male and female Long-Evans (Rattus norvegicus) rats. Subjects were either treated with [1] saline [2] lipopolysaccharide (LPS) to introduce an inflammatory state, [3] acetaminophen (APAP) to introduce oxidative stress, or [4] a dual-hit of both LPS + APAP on postnatal day (PD) …