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Articles 31 - 60 of 420

Full-Text Articles in Medical Sciences

Towards A Multimodal Approach For Assessing Adhd Hyperactivity Behaviors, Franceli L. Cibrian, Lauren Min, Vitica Arnold Dec 2024

Towards A Multimodal Approach For Assessing Adhd Hyperactivity Behaviors, Franceli L. Cibrian, Lauren Min, Vitica Arnold

Engineering Faculty Articles and Research

Attention Deficit Hyperactivity Disorder (ADHD) is the most prevalent childhood psychiatric condition that needs an assessment of inattention, hyperactivity, and impulsiveness symptoms. Particularly in young children, hyperactivity-impulsivity stands out as a primary concern. However, those behaviors may or may not be evidenced when a child is in a small room, one-on-one with a single adult. Therefore, Ambient Intelligence technology that supports data collection in a natural setting, paired with expert human decision-making can potentially improve the quality of assessments. In this paper, we conduct a literature review and analysis to align ADHD assessment criteria with potential sensor technologies to collect …


Multimodal Assessment Battery And Heart Rate Variability Enhance Clinical Utility Of Buffalo Concussion Treadmill Test, Daniel Miner, Michael Shiraishi, Pamela Gibbons, Rahul Soangra, Brent Harper Dec 2024

Multimodal Assessment Battery And Heart Rate Variability Enhance Clinical Utility Of Buffalo Concussion Treadmill Test, Daniel Miner, Michael Shiraishi, Pamela Gibbons, Rahul Soangra, Brent Harper

Physical Therapy Faculty Articles and Research

Context: The Buffalo Concussion Treadmill Test (BCTT) for exercise intolerance following concussion may highlight underlying autonomic dysfunction. Autonomic function at rest and with exertion may be predictive of neurocognitive performance for individuals with sports-related concussion. The purpose of this study is to explore the feasibility and utility of combining multimodal assessments with heart rate variability (HRV) measures during the BCTT for individuals with a remote history of concussion. Design: Prospective cohort study design, pretest/posttest. Methods: Participants included 5 males and 5 females (N = 10, age: 25.2 [3.3] y old, height: 173.2 [11.2] cm, mass: 73.4 [13.7] …


Early Host Defense Against Virus Infections, Søren R. Paludan, Thomas Pradeu, Andreas Pichlmair, K. Brad Wray, Jacob Giehm Mikkelsen, David Olagnier, Trine H. Mogensen Dec 2024

Early Host Defense Against Virus Infections, Søren R. Paludan, Thomas Pradeu, Andreas Pichlmair, K. Brad Wray, Jacob Giehm Mikkelsen, David Olagnier, Trine H. Mogensen

Presidential Fellows Articles and Research

Early host defense eliminates many viruses before infections are established while clearing others so they remain subclinical or cause only mild disease. The field of immunology has been shaped by broad concepts, including the pattern recognition theory that currently dominates innate immunology. Focusing on early host responses to virus infections, we analyze the literature to build a working hypothesis for the principles that govern the early line of cellular antiviral defense. Aiming to ultimately arrive at a criteria-based theory with strong explanatory power, we propose that both controlling infection and limiting inflammation are key drivers for the early cellular antiviral …


Etherealbreathing: A Holographic Biofeedback Game To Support Relaxation In Autistic Children, Arturo Morales Téllez, Isabel López Hurtado, Franceli L. Cibrian, Monica Tentori Dec 2024

Etherealbreathing: A Holographic Biofeedback Game To Support Relaxation In Autistic Children, Arturo Morales Téllez, Isabel López Hurtado, Franceli L. Cibrian, Monica Tentori

Engineering Faculty Articles and Research

Biofeedback training for box breathing is becoming increasingly accessible due to advancements in consumer-grade breathing sensors. However, there is limited research on their design and applications for specialized populations. This study evaluates a novel biofeedback holographic game, EtherealBreathing, designed to support autistic children. In EtherealBreathing, children practice box breathing to collect virtual elements to maintain the Earth's balance, using a wearable sensor to measure chest expansion for breath detection. A deployment study with 20 autistic children revealed that EtherealBreathing effectively promotes box breathing, leading to better health-related outcomes, such as lowering participants’ heart and respiratory rates than traditional practices. Biofeedback …


Verbal Working Memory And Syntactic Comprehension Segregate Into The Dorsal And Ventral Streams, Respectively, William Matchin, Zeinab K. Mollasaraei, Leonardo Bonilha, Christopher Rorden, Gregory Hickok, Dirk B. Den Ouden, Julius Fridriksson Dec 2024

Verbal Working Memory And Syntactic Comprehension Segregate Into The Dorsal And Ventral Streams, Respectively, William Matchin, Zeinab K. Mollasaraei, Leonardo Bonilha, Christopher Rorden, Gregory Hickok, Dirk B. Den Ouden, Julius Fridriksson

Communication Sciences and Disorders Faculty Articles and Research

Syntactic processing and verbal working memory are both essential components to sentence comprehension. Nonetheless, the separability of these systems in the brain remains unclear. To address this issue, we performed causal-inference analyses based on lesion and connectome network mapping using MRI and behavioural testing in two groups of individuals with chronic post-stroke aphasia. We employed a rhyme judgement task with heavy working memory load without articulatory confounds, controlling for the overall ability to match auditory words to pictures and to perform a metalinguistic rhyme judgement, isolating the effect of working memory load (103 individuals). We assessed non-canonical sentence comprehension, isolating …


Smartphone Haptics Can Uncover Differences In Touch Interactions Between Asd And Neurotypicals, Ivonne Monarca, Franceli L. Cibrian, Isabel López Hurtado, Monica Tentori Nov 2024

Smartphone Haptics Can Uncover Differences In Touch Interactions Between Asd And Neurotypicals, Ivonne Monarca, Franceli L. Cibrian, Isabel López Hurtado, Monica Tentori

Engineering Faculty Articles and Research

Utilizing touch interactions from smartphones for gathering data and identifying digital markers for screening and monitoring neurological disorders, such as Autism Spectrum Disorder (ASD), is an emerging area of research. Smartphones provide multiple benefits for this kind of study, including unobtrusive data collection via built-in sensors, integrated haptic feedback systems, and the capability to create specialized applications. Acknowledging the significant yet understudied presence of tactile processing differences in individuals with ASD, we designed and developed Feel and Touch, a mobile game that leverages the haptic capabilities of smartphones. This game provides vibrotactile feedback in response to touch interactions and collects …


Ancds Diversity Writing Group Discussion: The Evidence Base For Neuro-Rehabilitation Of Acquired And Degenerative Communication Disorders In Diverse Populations: What Is Available, What Is Needed, And Reasons Why, Gloriajean Wallace, Ivan Portillo, Latoya Roberts, Whitney Postman, Gerald Imaezue, Anthony Pak-Hin Kong, Taryn Malcolm Nov 2024

Ancds Diversity Writing Group Discussion: The Evidence Base For Neuro-Rehabilitation Of Acquired And Degenerative Communication Disorders In Diverse Populations: What Is Available, What Is Needed, And Reasons Why, Gloriajean Wallace, Ivan Portillo, Latoya Roberts, Whitney Postman, Gerald Imaezue, Anthony Pak-Hin Kong, Taryn Malcolm

Library Presentations, Posters, and Audiovisual Materials

This presentation will discuss evidence-based practice (EBP), with a focus on available research that supports the neurorehabilitation care of people with neurogenic disorders, including the increasingly large number of people from culturally and linguistically diverse communities.  Presenters will provide the audience with preliminary findings of the ANCDS Diversity Writing group.  Presenters will then provide the audience with thoughts about topics related to neurorehabilitation care of people from diverse communities, including topics relating to academic and clinical training, professional training, current practices, and conversation focused on cultural and linguistic considerations including the use of interpreters and translators.  The presentation will pinnacle …


Predisposing, Enabling, And Need Factors Influencing Health-Related Quality Of Life Among People With Metabolic Syndrome, Olajide Adekunle, Yun Wang, Ismaeel Yunusa, Marc L. Fleming, Enrique Seoane-Vazquez, Lawrence M. Brown Oct 2024

Predisposing, Enabling, And Need Factors Influencing Health-Related Quality Of Life Among People With Metabolic Syndrome, Olajide Adekunle, Yun Wang, Ismaeel Yunusa, Marc L. Fleming, Enrique Seoane-Vazquez, Lawrence M. Brown

Pharmacy Faculty Articles and Research

Background

Metabolic syndrome (MetS) continues to impact the health-related quality of life (HRQoL) of patients despite various available therapeutic interventions. There is a dearth of information on how patient-centered factors holistically predict HRQoL to provide more insights on addressing MetS.

Objective

To predict the HRQoL of patients with MetS in the Southern states, using the predisposing, enabling, and need factors.

Methods

The study adopted a cross-sectional approach in collecting 706 complete surveys on HRQoL assessment using the EQ-5D-5L survey and demographic characteristics based on the predisposing, enabling, and need factors of Andersen’s Behavioral model. The study focused on people with …


A Rose By Any Other Name: Mapping Taxonomic And Thematic Naming Errors Poststroke, Nicholas Riccardi, Deena Schwen Blackett, Abigail Broadhead, Dirk B. Den Ouden, Chris Rorden, Julius Fridriksson, Leonardo Bonilha, Rutvik H. Desai Oct 2024

A Rose By Any Other Name: Mapping Taxonomic And Thematic Naming Errors Poststroke, Nicholas Riccardi, Deena Schwen Blackett, Abigail Broadhead, Dirk B. Den Ouden, Chris Rorden, Julius Fridriksson, Leonardo Bonilha, Rutvik H. Desai

Communication Sciences and Disorders Faculty Articles and Research

Understanding the neurobiology of semantic knowledge is a major goal of cognitive neuroscience. Taxonomic and thematic semantic knowledge are represented differently within the brain's conceptual networks, but the specific neural mechanisms remain unclear. Some neurobiological models propose that the anterior temporal lobe is an important hub for taxonomic knowledge, whereas the TPJ is especially involved in the representation of thematic knowledge. However, recent studies have provided divergent evidence. In this context, we investigated the neural correlates of taxonomic and thematic confrontation naming errors in 79 people with aphasia. We used three complementary lesion-symptom mapping (LSM) methods to investigate how structure …


The Aphasia Recovery Cohort, An Open-Source Chronic Stroke Repository, Makayla Gibson, Roger Newman-Norlund, Leonardo Bonilha, Julius Fridriksson, Gregory Hickok, Argye E. Hillis, Dirk B. Den Ouden, Chris Rorden Sep 2024

The Aphasia Recovery Cohort, An Open-Source Chronic Stroke Repository, Makayla Gibson, Roger Newman-Norlund, Leonardo Bonilha, Julius Fridriksson, Gregory Hickok, Argye E. Hillis, Dirk B. Den Ouden, Chris Rorden

Communication Sciences and Disorders Faculty Articles and Research

Sharing neuroimaging datasets enables reproducibility, education, tool development, and new discoveries. Neuroimaging from many studies are publicly available, providing a glimpse into progressive disorders and human development. In contrast, few stroke studies are shared, and these datasets lack longitudinal sampling of functional imaging, diffusion imaging, as well as the behavioral and demographic data that encourage novel applications. This is surprising, as stroke is a leading cause of disability, and acquiring brain imaging is considered standard of care. The first release of the Aphasia Recovery Cohort includes imaging data, demographics and behavioral measures from 230 chronic stroke survivors who experienced aphasia. …


Multimodal Mixing Convolutional Neural Network And Transformer For Alzheimer’S Disease Recognition, Junde Chen, Yun Wang, Adnan Zeb, M. D. Suzauddola, Yuxin Wen Sep 2024

Multimodal Mixing Convolutional Neural Network And Transformer For Alzheimer’S Disease Recognition, Junde Chen, Yun Wang, Adnan Zeb, M. D. Suzauddola, Yuxin Wen

Engineering Faculty Articles and Research

Early recognition of Alzheimer’s disease (AD) and its precursor state, mild cognitive impairment (MCI), is pivotal in interrupting the progression of the disease and providing suitable treatment. Recent development in deep learning techniques has drawn great research attention for improving the efficacy of AD recognition. However, numerous current methods solely utilize data from a single auxiliary domain, limiting their ability to harness valuable intrinsic insights from multiple domains. To cope with the challenge, this paper is devoted to establishing an innovative multimodal medical data fusion model, termed as MMDF, to perform Alzheimer’s disease recognition. Multimodal data including clinical records and …


Leveraging The Science Of Early Life Predictability To Inform Policies Promoting Child Health, Laura M. Glynn, Sabrina R. Liu, Candice Taylor Lucas, Elysia Poggi Davis Aug 2024

Leveraging The Science Of Early Life Predictability To Inform Policies Promoting Child Health, Laura M. Glynn, Sabrina R. Liu, Candice Taylor Lucas, Elysia Poggi Davis

Psychology Faculty Articles and Research

Addressing the tremendous burden of early-life adversity requires constructive dialogues between scientists and policy makers to improve population health. Whereas dialogues focused on several aspects of early-life adversity have been initiated, discussion of an underrecognized form of adversity that has been observed across multiple contexts and cultures is only now emerging. Here we provide evidence for “why unpredictability?”, including: 1. Evidence that exposures to unpredictability affect child neurodevelopment, with influences that persist into adulthood. 2. The existence of a translational non-human animal model of exposure to early life unpredictability that can be capitalized upon to causally probe neurobiological mechanisms. 3. …


Slow Ramping Emerges From Spontaneous Fluctuations In Spiking Neural Networks, Jake Gavenas, Ueli Rutishauer, Aaron Schurger, Uri Maoz Aug 2024

Slow Ramping Emerges From Spontaneous Fluctuations In Spiking Neural Networks, Jake Gavenas, Ueli Rutishauer, Aaron Schurger, Uri Maoz

Psychology Faculty Articles and Research

The capacity to initiate actions endogenously is critical for goal-directed behavior. Spontaneous voluntary actions are typically preceded by slow-ramping activity in medial frontal cortex that begins around two seconds before movement, which may reflect spontaneous fluctuations that influence action timing. However, the mechanisms by which these slow ramping signals emerge from single-neuron and network dynamics remain poorly understood. Here, we developed a spiking neural-network model that produces spontaneous slow ramping activity in single neurons and population activity with onsets ~2 s before threshold crossings. A key prediction of our model is that neurons that ramp together have correlated firing patterns …


Towards An Interdisciplinary “Science Of The Mind”: A Call For Enhanced Collaboration Between Philosophy And Neuroscience, Alessandra Buccella, Uri Maoz, Liad Mudrik Jul 2024

Towards An Interdisciplinary “Science Of The Mind”: A Call For Enhanced Collaboration Between Philosophy And Neuroscience, Alessandra Buccella, Uri Maoz, Liad Mudrik

Psychology Faculty Articles and Research

In recent decades, the neuroscientific community has moved from describing the neural underpinnings of mental phenomena—as characterized by experimental psychology and philosophy of mind—to attempting to redefine those mental phenomena based on neural findings. Nowadays, many are intrigued by the idea that neuroscience might provide the “missing piece” that would allow philosophers (and, to an extent, psychologists, too) to make important advances, generating new means that these disciplines lack to close knowledge gaps and answer questions like “What is Free Will?” and “Do humans have it?.” In this paper, we argue that instead of striving for neuroscience to replace philosophy …


Antidepressant Effect Of Enzymatic Porcine Placenta Hydrolysate In Repeated Immobilization Stress-Induced Ovariectomized Female Mice, Minsook Ye, Sharon Nguyen, Min Ju Kim, Jee Sun Hwang, Gun Won Bae, Keun-Hang Susan Yang, Insop Shim Jun 2024

Antidepressant Effect Of Enzymatic Porcine Placenta Hydrolysate In Repeated Immobilization Stress-Induced Ovariectomized Female Mice, Minsook Ye, Sharon Nguyen, Min Ju Kim, Jee Sun Hwang, Gun Won Bae, Keun-Hang Susan Yang, Insop Shim

Biology, Chemistry, and Environmental Sciences Faculty Articles and Research

When postmenopausal women are under stress conditions, this exacerbates mood disorders and issues with neuroimmune systems. The porcine placenta is known to relieve menopausal depression in clinical trials, but its underlying mechanisms for depression and anti-inflammatory functions remain poorly defined. The present study was designed to examine the anti-inflammatory effects of enzymatic porcine placenta hydrolysate (EPPH) on LPS-induced levels of nitric oxide (NO), prostaglandin E2 (PGE2), corticosterone (CORT), and pro-inflammatory cytokine interleukin-1 beta (IL-1β) in RAW 264.7 macrophage cells. In addition, the neurite outgrowth of PC12 cells was evaluated to examine the effects of EPPH on neurite growth. To mimic …


A Single-Center, Assessor-Blinded, Randomized Controlled Clinical Trial To Test The Safety And Efficacy Of A Novel Brain-Computer Interface Controlled Functional Electrical Stimulation (Bci-Fes) Intervention For Gait Rehabilitation In The Chronic Stroke Population, Piyashi Biswas, Lucy Dodakian, Po T. Wang, Christopher A. Johnson, Jill See, Vicky Chan, Cathy Chou, Wendy Lazouras, Alison L. Mckenzie, David J. Reinkensmeyer, Danh V. Nguyen, Steven C. Cramer, An H. Do, Zoran Nenadic Jun 2024

A Single-Center, Assessor-Blinded, Randomized Controlled Clinical Trial To Test The Safety And Efficacy Of A Novel Brain-Computer Interface Controlled Functional Electrical Stimulation (Bci-Fes) Intervention For Gait Rehabilitation In The Chronic Stroke Population, Piyashi Biswas, Lucy Dodakian, Po T. Wang, Christopher A. Johnson, Jill See, Vicky Chan, Cathy Chou, Wendy Lazouras, Alison L. Mckenzie, David J. Reinkensmeyer, Danh V. Nguyen, Steven C. Cramer, An H. Do, Zoran Nenadic

Physical Therapy Faculty Articles and Research

Background

In the United States, there are over seven million stroke survivors, with many facing gait impairments due to foot drop. This restricts their community ambulation and hinders functional independence, leading to several long-term health complications. Despite the best available physical therapy, gait function is incompletely recovered, and this occurs mainly during the acute phase post-stroke. Therapeutic options are limited currently. Novel therapies based on neurobiological principles have the potential to lead to long-term functional improvements. The Brain-Computer Interface (BCI) controlled Functional Electrical Stimulation (FES) system is one such strategy. It is based on Hebbian principles and has shown promise …


Individual Longitudinal Changes In Dna-Methylome Identify Signatures Of Early-Life Adversity And Correlate With Later Outcome, Annabel K. Short, Ryan Weber, Noriko Kamei, Christina Wilcox Thai, Hina Arora, Ali Mortazavi, Hal S. Stern, Laura M. Glynn, Tallie Z. Baram May 2024

Individual Longitudinal Changes In Dna-Methylome Identify Signatures Of Early-Life Adversity And Correlate With Later Outcome, Annabel K. Short, Ryan Weber, Noriko Kamei, Christina Wilcox Thai, Hina Arora, Ali Mortazavi, Hal S. Stern, Laura M. Glynn, Tallie Z. Baram

Psychology Faculty Articles and Research

Adverse early-life experiences (ELA) affect a majority of the world's children. Whereas the enduring impact of ELA on cognitive and emotional health is established, there are no tools to predict vulnerability to ELA consequences in an individual child. Epigenetic markers including peripheral-cell DNA-methylation profiles may encode ELA and provide predictive outcome markers, yet the interindividual variance of the human genome and rapid changes in DNA methylation in childhood pose significant challenges. Hoping to mitigate these challenges we examined the relation of several ELA dimensions to DNA methylation changes and outcome using a within-subject longitudinal design and a high methylation-change threshold. …


Augmenting Hand And Arm Function For Persons With Hemiparesis, Brooke Stein, Susan Duff, Alison Mckenzie, Bailey Advincula, Isaac An, Annie Jeon, Casey Mcwilliam, Will Potter, Virginia Ruano, Paulina Vokulich, Audrey Howell, Rahul Soangra May 2024

Augmenting Hand And Arm Function For Persons With Hemiparesis, Brooke Stein, Susan Duff, Alison Mckenzie, Bailey Advincula, Isaac An, Annie Jeon, Casey Mcwilliam, Will Potter, Virginia Ruano, Paulina Vokulich, Audrey Howell, Rahul Soangra

Student Scholar Symposium Abstracts and Posters

Background. Hand and arm dysfunction due to neural disorders significantly influences quality of life. Activity-based training has been found to improve function. These improvements could be augmented with transcutaneous spinal cord stimulation (tSCS) due to the modulatory effect it has on spinal and supraspinal networks. Objective. The primary aim is to determine if a 4-week training program will improve hand and arm function. The secondary aim is to determine if the addition of tSCS to a second 4-week training session will further improve function. Design. This is a pre-posttest, controlled trial for persons 10-75 years of age, >6 months post …


Assessing Brain Processing Deficits Using Neuropsychological And Vision-Specific Tests For Concussion, Brent A. Harper, Rahul Soangra Apr 2024

Assessing Brain Processing Deficits Using Neuropsychological And Vision-Specific Tests For Concussion, Brent A. Harper, Rahul Soangra

Physical Therapy Faculty Articles and Research

Introduction: Since verbal memory and visual processing transpire within analogous cerebral regions, this study assessed (i) if a visual function can predict verbal memory performance. It also hypothesized whether neurocognitive (e.g., ImPACT) tests focusing on the Visual Memory and Cognitive Efficacy Index will predict Verbal Memory scores and (ii) if vision metrics and age can identify individuals with a history of concussion. Finally, it also hypothesized that King–Devick and near point of convergence scores alongside age considerations will identify candidates with a prior reported history of concussion. Materials and methods: This observational cohort assessed 25 collegiate ice hockey players prior …


Advancing Brain Tumor Segmentation With Spectral–Spatial Graph Neural Networks, Sina Mohammadi, Mohamed Allali Apr 2024

Advancing Brain Tumor Segmentation With Spectral–Spatial Graph Neural Networks, Sina Mohammadi, Mohamed Allali

Engineering Faculty Articles and Research

In the field of brain tumor segmentation, accurately capturing the complexities of tumor sub-regions poses significant challenges. Traditional segmentation methods usually fail to accurately segment tumor subregions. This research introduces a novel solution employing Graph Neural Networks (GNNs), enriched with spectral and spatial insight. In the supervoxel creation phase, we explored methods like VCCS, SLIC, Watershed, Meanshift, and Felzenszwalb–Huttenlocher, evaluating their performance based on homogeneity, moment of inertia, and uniformity in shape and size. After creating supervoxels, we represented 3D MRI images as a graph structure. In this study, we combined Spatial and Spectral GNNs to capture both local and …


Apigenin Alleviates Autistic-Like Stereotyped Repetitive Behaviors And Mitigates Brain Oxidative Stress In Mice, Petrilla Jayaprakash, Dmytro Isaev, Keun-Hang Susan Yang, Rami Beiram, Murat Oz, Bassem Sadek Apr 2024

Apigenin Alleviates Autistic-Like Stereotyped Repetitive Behaviors And Mitigates Brain Oxidative Stress In Mice, Petrilla Jayaprakash, Dmytro Isaev, Keun-Hang Susan Yang, Rami Beiram, Murat Oz, Bassem Sadek

Biology, Chemistry, and Environmental Sciences Faculty Articles and Research

Studying the involvement of nicotinic acetylcholine receptors (nAChRs), specifically α7-nAChRs, in neuropsychiatric brain disorders such as autism spectrum disorder (ASD) has gained a growing interest. The flavonoid apigenin (APG) has been confirmed in its pharmacological action as a positive allosteric modulator of α7-nAChRs. However, there is no research describing the pharmacological potential of APG in ASD. The aim of this study was to evaluate the effects of the subchronic systemic treatment of APG (10–30 mg/kg) on ASD-like repetitive and compulsive-like behaviors and oxidative stress status in the hippocampus and cerebellum in BTBR mice, utilizing the reference drug aripiprazole (ARP, 1 …


The Feigned Annoyance And Frustration Test To Activate The Sympathoadrenal Medullary System, Ted W. Gehrig Iii, Lee S. Berk, Robert I. Dudley, Jo A. Smith, Lida Gharibvand, Everett B. Lohman Iii Apr 2024

The Feigned Annoyance And Frustration Test To Activate The Sympathoadrenal Medullary System, Ted W. Gehrig Iii, Lee S. Berk, Robert I. Dudley, Jo A. Smith, Lida Gharibvand, Everett B. Lohman Iii

Physical Therapy Faculty Articles and Research

When perceived as threatening, social interactions have been shown to trigger the sympathoadrenal medullary system as well as the hypothalamic-pituitary-adrenal axis resulting in a physiologic stress response. The allostatic load placed on human health and physiology in the context of acute and chronic stress can have profound health consequences. The purpose of this study was to develop a protocol for a lab-based stress stimulus using social-evaluative threat. While several valid, stress-stimulating protocols exist, we sought to develop one that triggered a physiologic response, did not require significant lab resources, and could be completed in around 10 min. We included 53 …


Dissociating Reading And Auditory Comprehension In Persons With Aphasia, Rachael M. Harrington, Sigfus Kristinsson, Janina Wilmskoetter, Natalie Busby, Dirk B. Den Ouden, Chris Rorden, Julius Fridriksson, Leonardo Bonilha Mar 2024

Dissociating Reading And Auditory Comprehension In Persons With Aphasia, Rachael M. Harrington, Sigfus Kristinsson, Janina Wilmskoetter, Natalie Busby, Dirk B. Den Ouden, Chris Rorden, Julius Fridriksson, Leonardo Bonilha

Communication Sciences and Disorders Faculty Articles and Research

Language comprehension is often affected in individuals with post-stroke aphasia. However, deficits in auditory comprehension are not fully correlated with deficits in reading comprehension and the mechanisms underlying this dissociation remain unclear. This distinction is important for understanding language mechanisms, predicting long-term impairments and future development of treatment interventions. Using comprehensive auditory and reading measures from a large cohort of individuals with aphasia, we evaluated the relationship between aphasia type and reading comprehension impairments, the relationship between auditory versus reading comprehension deficits and the crucial neuroanatomy supporting the dissociation between post-stroke reading and auditory deficits. Scores from the Western Aphasia …


Modifying Peptide/Lipid-Associated Nucleic Acids (Planas) For Crispr/Cas9 Ribonucleoprotein Delivery, Abdulelah Alhazza, Parvin Mahdipoor, Ryley Hall, Arthur Manda, Sandeep Lohan, Keykavous Parang, Hamidreza Montazeri Aliabadi Jan 2024

Modifying Peptide/Lipid-Associated Nucleic Acids (Planas) For Crispr/Cas9 Ribonucleoprotein Delivery, Abdulelah Alhazza, Parvin Mahdipoor, Ryley Hall, Arthur Manda, Sandeep Lohan, Keykavous Parang, Hamidreza Montazeri Aliabadi

Pharmacy Faculty Articles and Research

With the first reports on the possibility of genome editing by Clustered Regularly Interspaced Short Palindromic Repeats (CRISPR) and CRISPR-associated protein (Cas)9 surfacing in 2005, the enthusiasm for protein silencing via nucleic acid delivery experienced a resurgence following a period of diminished enthusiasm due to challenges in delivering small interfering RNAs (siRNA), especially in vivo. However, delivering the components necessary for this approach into the nucleus is challenging, maybe even more than the cytoplasmic delivery of siRNA. We previously reported the birth of peptide/lipid-associated nucleic acids (PLANAs) for siRNA delivery. This project was designed to investigate the efficiency of …


Grammatical Parallelism In Aphasia: A Lesion-Symptom Mapping Study, William Matchin, Dirk B. Den Ouden, Alexandra Basilakos, Brielle Caserta Stark, Julius Fridriksson, Gregory Hickok Oct 2023

Grammatical Parallelism In Aphasia: A Lesion-Symptom Mapping Study, William Matchin, Dirk B. Den Ouden, Alexandra Basilakos, Brielle Caserta Stark, Julius Fridriksson, Gregory Hickok

Communication Sciences and Disorders Faculty Articles and Research

Sentence structure, or syntax, is potentially a uniquely creative aspect of the human mind. Neuropsychological experiments in the 1970s suggested parallel syntactic production and comprehension deficits in agrammatic Broca’s aphasia, thought to result from damage to syntactic mechanisms in Broca’s area in the left frontal lobe. This hypothesis was sometimes termed overarching agrammatism, converging with developments in linguistic theory concerning central syntactic mechanisms supporting language production and comprehension. However, the evidence supporting an association among receptive syntactic deficits, expressive agrammatism, and damage to frontal cortex is equivocal. In addition, the relationship among a distinct grammatical production deficit in aphasia, …


Tolfenamic Acid Derivatives: A New Class Of Transcriptional Modulators With Potential Therapeutic Applications For Alzheimer’S Disease And Related Disorders, Juanetta Hill, Karim E. Shalaby, Syed W. Bihaqi, Bothaina H. Alansi, Benjamin Barlock, Keykavous Parang, Richard Thompson, Khalid Ourarhni, Nasser H. Zawia Oct 2023

Tolfenamic Acid Derivatives: A New Class Of Transcriptional Modulators With Potential Therapeutic Applications For Alzheimer’S Disease And Related Disorders, Juanetta Hill, Karim E. Shalaby, Syed W. Bihaqi, Bothaina H. Alansi, Benjamin Barlock, Keykavous Parang, Richard Thompson, Khalid Ourarhni, Nasser H. Zawia

Pharmacy Faculty Articles and Research

The field of Alzheimer’s disease (AD) has witnessed recent breakthroughs in the development of disease-modifying biologics and diagnostic markers. While immunotherapeutic interventions have provided much-awaited solutions, nucleic acid-based tools represent other avenues of intervention; however, these approaches are costly and invasive, and they have serious side effects. Previously, we have shown in AD animal models that tolfenamic acid (TA) can lower the expression of AD-related genes and their products and subsequently reduce pathological burden and improve cognition. Using TA as a scaffold and the zinc finger domain of SP1 as a pharmacophore, we developed safer and more potent brain-penetrating analogs …


Purification And Biochemical Characterization Of The Dna Binding Domain Of The Nitrogenase Transcriptional Activator Nifa From Gluconacetobacter Diazotrophicus, Heidi G. Standke, Lois Kim, Cedric P. Owens Oct 2023

Purification And Biochemical Characterization Of The Dna Binding Domain Of The Nitrogenase Transcriptional Activator Nifa From Gluconacetobacter Diazotrophicus, Heidi G. Standke, Lois Kim, Cedric P. Owens

Biology, Chemistry, and Environmental Sciences Faculty Articles and Research

NifA is a σ54 activator that turns on bacterial nitrogen fixation under reducing conditions and when fixed cellular nitrogen levels are low. The redox sensing mechanism in NifA is poorly understood. In α- and β-proteobacteria, redox sensing involves two pairs of Cys residues within and immediately following the protein’s central AAA+ domain. In this work, we examine if an additional Cys pair that is part of a C(X)5 C motif and located immediately upstream of the DNA binding domain of NifA from the α-proteobacterium Gluconacetobacter diazotrophicus (Gd) is involved in redox sensing. We hypothesize that the …


Adaptive Octree Meshes For Simulation Of Extracellular Electrophysiology, Christopher Bc Girard, Dong Song Sep 2023

Adaptive Octree Meshes For Simulation Of Extracellular Electrophysiology, Christopher Bc Girard, Dong Song

Engineering Faculty Articles and Research

Objective. The interaction between neural tissues and artificial electrodes is crucial for understanding and advancing neuroscientific research and therapeutic applications. However, accurately modeling this space around the neurons rapidly increases the computational complexity of neural simulations. Approach. This study demonstrates a dynamically adaptive simulation method that greatly accelerates computation by adjusting spatial resolution of the simulation as needed. Use of an octree structure for the mesh, in combination with the admittance method for discretizing conductivity, provides both accurate approximation and ease of modification on-the-fly. Main results. In tests of both local field potential estimation and multi-electrode stimulation, dynamically adapted meshes …


Causal Inference Methods For Estimation Of Survival And General Health Status Measures Of Alzheimer’S Disease Patients, Ehsan Yaghmaei Aug 2023

Causal Inference Methods For Estimation Of Survival And General Health Status Measures Of Alzheimer’S Disease Patients, Ehsan Yaghmaei

Computational and Data Sciences (PhD) Dissertations

Identifying optimal treatment options with respect to survival of Alzheimer's disease patients is crucially important and previously uninvestigated research question. Our objective was to estimate the causal effects of the most prevalent classes of Alzheimer’s disease drugs, Donepezil and Memantine, and their combined use on Survival and General Health Status Measures of Alzheimer's disease patients for the first five years after initial diagnosis. We carried out a thorough causal inference study using doubly robust estimators, nonparametric bootstrap confidence intervals, Bonferroni corrections for multiple comparisons and analyzing one of the largest high-quality medical databases containing millions of de-identified electronic health records …


Lower Socioeconomic Status Is Associated With Premature Brain Aging, Natalie Busby, Sarah Newman-Norlund, Sara Sayers, Roger Newman-Norlund, Janina Wilmskoetter, Chris Rorden, Samaneh Nemati, Sarah Wilson, Nicholas Riccardi, Rebecca Roth, Lisa Johnson, Dirk B. Den Ouden, Julius Fridriksson, Leonardo Bonilha Jun 2023

Lower Socioeconomic Status Is Associated With Premature Brain Aging, Natalie Busby, Sarah Newman-Norlund, Sara Sayers, Roger Newman-Norlund, Janina Wilmskoetter, Chris Rorden, Samaneh Nemati, Sarah Wilson, Nicholas Riccardi, Rebecca Roth, Lisa Johnson, Dirk B. Den Ouden, Julius Fridriksson, Leonardo Bonilha

Communication Sciences and Disorders Faculty Articles and Research

Background

Premature age-related brain changes may be influenced by physical health factors. Lower socioeconomic status (SES) is often associated with poorer physical health. In this study, we aimed to investigate the relationship between SES and premature brain aging.

Methods

Brain age was estimated from T1-weighted images using BrainAgeR in 217 participants from the ABC@UofSC Repository. The difference between brain and chronological age (BrainGAP) was calculated. Multiple regression models were used to predict BrainGAP with age, SES, body mass index, diabetes, hypertension, sex, race, and education as predictors. SES was calculated from size-adjusted household income and the cost of living. …