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2022

Cognition

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Full-Text Articles in Medicine and Health Sciences

Lecanemab In Patients With Early Alzheimer's Disease: Detailed Results On Biomarker, Cognitive, And Clinical Effects From The Randomized And Open-Label Extension Of The Phase 2 Proof-Of-Concept Study, Eric Mcdade, Jeffrey L Cummings, Shobha Dhadda, Chad J Swanson, Larisa Reyderman, Michio Kanekiyo, Akihiko Koyama, Michael Irizarry, Lynn D Kramer, Randall J Bateman Dec 2022

Lecanemab In Patients With Early Alzheimer's Disease: Detailed Results On Biomarker, Cognitive, And Clinical Effects From The Randomized And Open-Label Extension Of The Phase 2 Proof-Of-Concept Study, Eric Mcdade, Jeffrey L Cummings, Shobha Dhadda, Chad J Swanson, Larisa Reyderman, Michio Kanekiyo, Akihiko Koyama, Michael Irizarry, Lynn D Kramer, Randall J Bateman

2020-Current year OA Pubs

BACKGROUND: Lecanemab, a humanized IgG1 monoclonal antibody that targets soluble aggregated Aβ species (protofibrils), has demonstrated robust brain fibrillar amyloid reduction and slowing of clinical decline in early AD. The objective of this analysis is to report results from study 201 blinded period (core), the open-label extension (OLE), and gap period (between core and OLE) supporting the effectiveness of lecanemab.

METHODS: The lecanemab study 201 core was a double-blind, randomized, placebo-controlled study of 856 patients randomized to one of five dose regimens or placebo. An OLE of study 201 was initiated to allow patients to receive open-label lecanemab 10mg/kg biweekly …


Relationship Of Cognition And Alzheimer’S Disease With Gastrointestinal Tract Disorders: A Large-Scale Genetic Overlap And Mendelian Randomisation Analysis, Emmanuel O. Adewuyi, Eleanor K. O’Brien, Tenielle Porter, Simon M. Laws Dec 2022

Relationship Of Cognition And Alzheimer’S Disease With Gastrointestinal Tract Disorders: A Large-Scale Genetic Overlap And Mendelian Randomisation Analysis, Emmanuel O. Adewuyi, Eleanor K. O’Brien, Tenielle Porter, Simon M. Laws

Research outputs 2022 to 2026

Emerging observational evidence suggests links between cognitive impairment and a range of gastrointestinal tract (GIT) disorders; however, the mechanisms underlying their relationships remain unclear. Leveraging large-scale genome-wide association studies’ summary statistics, we comprehensively assessed genetic overlap and potential causality of cognitive traits and Alzheimer’s disease (AD) with several GIT disorders. We demonstrate a strong and highly significant inverse global genetic correlation between cognitive traits and GIT disorders — peptic ulcer disease (PUD), gastritis-duodenitis, diverticulosis, irritable bowel syndrome, and gastroesophageal reflux disease (GERD), but not inflammatory bowel disease (IBD). Further analysis detects 35 significant (p < 4.37 × 10 − 5) bivariate local genetic …


Social Attention During Object Engagement: Toward A Cross-Species Measure Of Preferential Social Orienting, Claire Weichselbaum, Nicole Hendrix, Jordan Albright, Joseph D Dougherty, Kelly N Botteron, John N Constantino, Natasha Marrus Dec 2022

Social Attention During Object Engagement: Toward A Cross-Species Measure Of Preferential Social Orienting, Claire Weichselbaum, Nicole Hendrix, Jordan Albright, Joseph D Dougherty, Kelly N Botteron, John N Constantino, Natasha Marrus

2020-Current year OA Pubs

BACKGROUND: A central challenge in preclinical research investigating the biology of autism spectrum disorder (ASD) is the translation of ASD-related social phenotypes across humans and animal models. Social orienting, an observable, evolutionarily conserved behavior, represents a promising cross-species ASD phenotype given that disrupted social orienting is an early-emerging ASD feature with evidence for predicting familial recurrence. Here, we adapt a competing-stimulus social orienting task from domesticated dogs to naturalistic play behavior in human toddlers and test whether this approach indexes decreased social orienting in ASD.

METHODS: Play behavior was coded from the Autism Diagnostic Observation Schedule (ADOS) in two samples …


The Impact Of Alzheimer Disease On Semantic Knowledge, Maileen G. Ulep Dec 2022

The Impact Of Alzheimer Disease On Semantic Knowledge, Maileen G. Ulep

UNLV Theses, Dissertations, Professional Papers, and Capstones

The research furthers the understanding of the impact of Alzheimer disease (AD) on cognition and the organization of semantic knowledge in the brain, which might contribute to the development of diagnostic and staging tools, and interventions to palliate cognitive deficits. The disruption of semantic knowledge in AD is well documented in the literature. Much of the existing research focuses on the general impact AD has on semantic knowledge. This study explores the impact of AD on specific domains of knowledge, chiefly, living kinds and artifacts, critical to ordinary functioning. The content, organization and structure of the investigated domains of knowledge …


Effects Of Home-Based High-Intensity Interval Training Versus Continuous Walking On Cognition In Overweight And Obese Women, Kelsey C. Bourbeau Dec 2022

Effects Of Home-Based High-Intensity Interval Training Versus Continuous Walking On Cognition In Overweight And Obese Women, Kelsey C. Bourbeau

Health, Exercise, and Sports Sciences ETDs

Objective: The purpose of the present study was to determine whether six weeks of home-based high-intensity interval training versus six weeks of moderate-intensity walking improves cognition, depression, and anxiety in women that are overweight or obese. Design: A randomized control trial design. Subjects: Twelve sedentary women characterized as overweight or obese were randomized into either a six-week home-based high-intensity interval training (HIIT, n = 6, 26.6 ± 8.9 years, 37.4 ± 4.9% body fat) group or a six-week moderate-intensity walking (Walk, n = 6, 22.5 ± 3.7 years, 40.2 ± 4.1% body fat) group. Main Measures: Pre- and post-intervention, participants …


Cognition And The Single Neuron: How Cell Types Construct The Dynamic Computations Of Frontal Cortex, Amelia J Christensen, Torben Ott, Adam Kepecs Dec 2022

Cognition And The Single Neuron: How Cell Types Construct The Dynamic Computations Of Frontal Cortex, Amelia J Christensen, Torben Ott, Adam Kepecs

2020-Current year OA Pubs

Frontal cortex is thought to underlie many advanced cognitive capacities, from self-control to long term planning. Reflecting these diverse demands, frontal neural activity is notoriously idiosyncratic, with tuning properties that are correlated with endless numbers of behavioral and task features. This menagerie of tuning has made it difficult to extract organizing principles that govern frontal neural activity. Here, we contrast two successful yet seemingly incompatible approaches that have begun to address this challenge. Inspired by the indecipherability of single-neuron tuning, the first approach casts frontal computations as dynamical trajectories traversed by arbitrary mixtures of neurons. The second approach, by contrast, …


The Role Of Leisure Engagement In Fostering Cognition In Aging, Karen Wenzel Dec 2022

The Role Of Leisure Engagement In Fostering Cognition In Aging, Karen Wenzel

All Dissertations

Leisure activities are a major component of healthy aging, associated with reduced risk of cognitive decline and enhanced cognitive function. However, there is wide variation in the conceptualization and measurement of leisure. Specific leisure activities or domains have been studied in association with cognition in aging. More recently, researchers have noted that attributes of the activity, rather than the activity itself, may be significant. This study explored the current state of knowledge regarding attributes of leisure activities that foster cognition in aging. A literature review using PRISMA Scoping Review guidelines identified objectively and subjectively measured attributes of leisure engagement in …


Aerobic Fitness Levels Relate To Cognitive Function In People With Parkinson’S Disease As Assessed By The 6 Minute Walk Test, John Wallace, Kaylie Zapanta, E Todd Schroeder, Beth Fisher Nov 2022

Aerobic Fitness Levels Relate To Cognitive Function In People With Parkinson’S Disease As Assessed By The 6 Minute Walk Test, John Wallace, Kaylie Zapanta, E Todd Schroeder, Beth Fisher

International Journal of Exercise Science: Conference Proceedings

While individuals with Parkinson’s disease (PD) present with impaired motor control, 26% demonstrate cognitive impairment independent of dementia1. In fact, cognitive dysfunction often predates motor impairments and can diminish quality of life2 as well as life expectancy3. Fortunately, aerobic exercise has been shown to improve cognition in older adults4 as well as PD patients5-7. However, only a limited number of studies have determined a clear relationship between aerobic fitness levels and cognition in people with PD. Determining whether cognitive status and aerobic fitness levels are associated in people with PD would provide …


Can Cerebral Hemodynamics Explain The Changes In Cognition Associated With Wearing A Facemask During Exercise?, Axel Munoz, Stefan Keslacy, Viviana Garcia, Ceren Acik Nov 2022

Can Cerebral Hemodynamics Explain The Changes In Cognition Associated With Wearing A Facemask During Exercise?, Axel Munoz, Stefan Keslacy, Viviana Garcia, Ceren Acik

International Journal of Exercise Science: Conference Proceedings

The use of facemasks while exercising raises concerns about oxygen supply. Recent studies have found a decrease in exercise performance. An increased HR, RPE, and laborious breathing were reported when exercising with a mask. However, there is a knowledge gap on exercising with a mask on brain function. PURPOSE: to evaluate the effect of wearing a KN95 mask on cerebral hemodynamics and cognitive function. METHODS: 4 subjects participated in this preliminary study. They visited the lab twice and we randomized wearing a mask. Subjects completed a computerized Wisconsin Card Sorting Test (WCST, Psychtoolkit.org) before, during, and 2’ after an …


Effects Of Physical Activity On The Cognitive Performance Of Older Adults With Cognitive Impairment: A Critically Appraised Topic, Amaiah N. Young Nov 2022

Effects Of Physical Activity On The Cognitive Performance Of Older Adults With Cognitive Impairment: A Critically Appraised Topic, Amaiah N. Young

Honors College Theses

The aging population is the fastest growing population currently. Older adults are most susceptible to cognitive impairment, because of the natural cognitive decline with age. Physical activity changes the body physically by increasing strength and endurance of muscles, and aids quality of life by decreasing the negative impact of cognitive impairment. This study investigated the influence of physical activity on cognitive performance of cognitively impaired older adults. This study found that physical activity had a beneficial effect on cognition when physical activity plans were done for at least 6 months and of moderate to high intensity. While, all areas of …


Examining The Effects Of Formal Education Level On The Montreal Cognitive Assessment, Renee S. White, Justin M. Barber, Jordan P. Harp, Gregory A. Jicha Nov 2022

Examining The Effects Of Formal Education Level On The Montreal Cognitive Assessment, Renee S. White, Justin M. Barber, Jordan P. Harp, Gregory A. Jicha

Sanders-Brown Center on Aging Faculty Publications

Background: Brief, global assessments such as the Montreal Cognitive Assessment (MoCA) are widely used in primary care for assessing cognition in older adults. Like other neuropsychological instruments, lower formal education can influence MoCA interpretation.

Methods: Data from 2 large studies of cognitive aging were used—Alzheimer’s Disease Neuroimaging Initiative (ADNI) and National Alzheimer’s Coordinating Center (NACC). Both use comprehensive examinations to determine cognitive status and have brain amyloid status for many participants. Mixed models were used to account for random variation due to data source.

Results: Cognitively intact participants with lower education (≤12 years) were more likely than …


Home E-Cigarette Rules And Youth's Vulnerability To Initiate And Sustain E-Cigarette Use, Anne Buu, Joon Kyung Nam, Meng Yang, Wei-Chung Su, Hsien-Chang Lin Nov 2022

Home E-Cigarette Rules And Youth's Vulnerability To Initiate And Sustain E-Cigarette Use, Anne Buu, Joon Kyung Nam, Meng Yang, Wei-Chung Su, Hsien-Chang Lin

Journal Articles

Existing studies of the impact of home rules on youth's vulnerability to e-cigarette use were based on cross-sectional data, youth or parent reports alone, as well as youth's perceptions and susceptibility. This study capitalizes on the restricted-use data of the Population Assessment of Tobacco and Health (PATH) Study to examine the longitudinal association between home rules for e-cigarette use and youth's vulnerability including initiation of use and regular use two years later. Secondary analysis was conducted on 1203 parent-youth pairs who participated in both Wave 4 (2016-2018) and Wave 5 (2018-2019) assessment of the PATH Study and while the youth …


Amyloid-Β And Tau Deposition Influences Cognitive And Functional Decline In Down Syndrome, Monika Grigorova, Beau Ances, Et Al. Nov 2022

Amyloid-Β And Tau Deposition Influences Cognitive And Functional Decline In Down Syndrome, Monika Grigorova, Beau Ances, Et Al.

2020-Current year OA Pubs

This study investigates whether tau has (i) an independent effect from amyloid-β on changes in cognitive and functional performance and (ii) a synergistic relationship with amyloid-β in the exacerbation of decline in aging Down syndrome (DS). 105 participants with DS underwent baseline PET [


The Potent And Selective Histamine H3 Receptor Antagonist E169 Alleviates Cognitive Deficits And Mitigates Disturbed Pi3k/Akt/Gsk-3Β Signaling Pathway In Mk801-Induced Amnesia In Mice, Sabna Tagelsir Hassan Abdalla Nov 2022

The Potent And Selective Histamine H3 Receptor Antagonist E169 Alleviates Cognitive Deficits And Mitigates Disturbed Pi3k/Akt/Gsk-3Β Signaling Pathway In Mk801-Induced Amnesia In Mice, Sabna Tagelsir Hassan Abdalla

Theses

The role of Histamine H3 Receptors (H3Rs) in memory and the prospective of H3R antagonists in pharmacological control of neurodegenerative disorders, e.g., Alzheimer’s Disease (AD) is well-accepted. Therefore, the procognitive effects of acute systemic administration of H3R antagonist E169 (2.5-10 mg/kg, i.p.) on MK801- induced amnesia using the Novel Object Recognition Test (NORT) paradigm in C57BL/6J mice were evaluated. E169 (5 mg) provided a significant memory-improving effect on MK801-induced short- and long-term memory impairments in NORT. The E169 (5 mg) provided effects were comparable to those observed with the Phosphatidyl Inositol 3-Kinase (PI3K) inhibitor LY294002 and were abrogated with the …


Home E-Cigarette Rules And Youth's Vulnerability To Initiate And Sustain E-Cigarette Use, Anne Buu, Joon Kyung Nam, Meng Yang, Wei-Chung Su, Hsien-Chang Lin Nov 2022

Home E-Cigarette Rules And Youth's Vulnerability To Initiate And Sustain E-Cigarette Use, Anne Buu, Joon Kyung Nam, Meng Yang, Wei-Chung Su, Hsien-Chang Lin

Journal Articles

Existing studies of the impact of home rules on youth's vulnerability to e-cigarette use were based on cross-sectional data, youth or parent reports alone, as well as youth's perceptions and susceptibility. This study capitalizes on the restricted-use data of the Population Assessment of tobacco and Health (PATH) Study to examine the longitudinal association between home rules for e-cigarette use and youth's vulnerability including initiation of use and regular use two years later. Secondary analysis was conducted on 1203 parent-youth pairs who participated in both Wave 4 (2016-2018) and Wave 5 (2018-2019) assessment of the PATH Study and while the youth …


Early Life Exposure To Unpredictable Parental Sensory Signals Shapes Cognitive Development Across Three Species, Elyssia Poggi Davis, Kari Mccormack, Hina Arora, Desiree Sharpe, Annabel K. Short, Jocelyne Bachevalier, Laura M. Glynn, Curt A. Sandman, Hal S. Stern, Mar Sanchez, Tallie Z. Baram Oct 2022

Early Life Exposure To Unpredictable Parental Sensory Signals Shapes Cognitive Development Across Three Species, Elyssia Poggi Davis, Kari Mccormack, Hina Arora, Desiree Sharpe, Annabel K. Short, Jocelyne Bachevalier, Laura M. Glynn, Curt A. Sandman, Hal S. Stern, Mar Sanchez, Tallie Z. Baram

Psychology Faculty Articles and Research

Exposure to early life adversity has long term consequences on cognitive function. Most research has focused on understanding components of early life adversities that contribute to later risk, including poverty, trauma, maltreatment, and neglect. Whereas these factors, in the aggregate, explain a significant proportion of emotional and cognitive problems, there are serious gaps in our ability to identify potential mechanisms by which early life adversities might promote vulnerability or resilience. Here we discuss early life exposure to unpredictable signals from the caretaker as an understudied type of adversity that is amenable to prevention and intervention. We employ a translational approach …


Longitudinal Effects Of Combination Antiretroviral Therapy On Cognition And Neuroimaging Biomarkers In Treatment-Naive People With Hiv, Miriam T Weber, Alan Finkelstein, Md Nasir Uddin, Elizabeth Asiago Reddy, Roberto C Arduino, Lu Wang, Madalina E Tivarus, Jianhui Zhong, Xing Qiu, Giovanni Schifitto Sep 2022

Longitudinal Effects Of Combination Antiretroviral Therapy On Cognition And Neuroimaging Biomarkers In Treatment-Naive People With Hiv, Miriam T Weber, Alan Finkelstein, Md Nasir Uddin, Elizabeth Asiago Reddy, Roberto C Arduino, Lu Wang, Madalina E Tivarus, Jianhui Zhong, Xing Qiu, Giovanni Schifitto

Journal Articles

BACKGROUND AND OBJECTIVES: While combination antiretroviral therapy (cART) has dramatically increased the life expectancy of people with HIV (PWH), nearly 50% develop HIV-associated neurocognitive disorders. This may be due to previously uncontrolled HIV viral replication, immune activation maintained by residual viral replication or activation from other sources, or cART-associated neurotoxicity. The aim of this study was to determine the effect of cART on cognition and neuroimaging biomarkers in PWH before and after initiation of cART compared with that in HIV-negative controls (HCs) and HIV elite controllers (ECs) who remain untreated.

METHODS: We recruited 3 groups of participants from the University …


Does Social Intolerance Vary According To Cognitive Styles, Genetic Cognitive Capacity, Or Education?, Aino Saarinen, Liisa Keltikangas-Järvinen, Henrik Dobewall, C Robert Cloninger, Ari Ahola-Olli, Terho Lehtimäki, Nina Hutri-Kähönen, Olli Raitakari, Suvi Rovio, Niklas Ravaja Sep 2022

Does Social Intolerance Vary According To Cognitive Styles, Genetic Cognitive Capacity, Or Education?, Aino Saarinen, Liisa Keltikangas-Järvinen, Henrik Dobewall, C Robert Cloninger, Ari Ahola-Olli, Terho Lehtimäki, Nina Hutri-Kähönen, Olli Raitakari, Suvi Rovio, Niklas Ravaja

2020-Current year OA Pubs

BACKGROUND: Low education, low cognitive abilities, and certain cognitive styles are suggested to predispose to social intolerance and prejudices. Evidence is, however, restricted by comparatively small samples, neglect of confounding variables and genetic factors, and a narrow focus on a single sort of prejudice. We investigated the relationships of education, polygenic cognitive potential, cognitive performance, and cognitive styles with social intolerance in adulthood over a 15-year follow-up.

METHODS: We used data from the prospective population-based Young Finns Study (n = 960-1679). Social intolerance was evaluated with the Social Intolerance Scale in 1997, 2001, and 2011; cognitive performance with the Cambridge …


Neuroanatomy In Mild Cognitive Impairment: Relationship To Functional Skills, Treatment Expectancy, And Comorbid Depression, Sara Rushia Sep 2022

Neuroanatomy In Mild Cognitive Impairment: Relationship To Functional Skills, Treatment Expectancy, And Comorbid Depression, Sara Rushia

Dissertations, Theses, and Capstone Projects

Mild cognitive impairment (MCI) is a neurocognitive disorder defined by cognitive decline in older adults. Although MCI has been studied for decades, there remain important areas to be explored in order to adequately characterize aspects of this disorder that provide information valuable for possible interventions and disease progression to dementia, including a better understanding of the neuroanatomical variables relevant to this disorder. Such neuroanatomical variables include cortical thickness, hippocampal volume, and white matter hyperintensities (WMHs). This dissertation consists of three separate studies aimed at addressing gaps in the literature on MCI in relation to brain morphometrics and under-studied characteristics involved …


A Pilot Randomized Trial To Examine Effects Of A Hybrid Closed-Loop Insulin Delivery System On Neurodevelopmental And Cognitive Outcomes In Adolescents With Type 1 Diabetes, Allan L Reiss, Ana Maria Arbelaez, Et Al Aug 2022

A Pilot Randomized Trial To Examine Effects Of A Hybrid Closed-Loop Insulin Delivery System On Neurodevelopmental And Cognitive Outcomes In Adolescents With Type 1 Diabetes, Allan L Reiss, Ana Maria Arbelaez, Et Al

2020-Current year OA Pubs

Type 1 diabetes (T1D) is associated with lower scores on tests of cognitive and neuropsychological function and alterations in brain structure and function in children. This proof-of-concept pilot study (ClinicalTrials.gov Identifier NCT03428932) examined whether MRI-derived indices of brain development and function and standardized IQ scores in adolescents with T1D could be improved with better diabetes control using a hybrid closed-loop insulin delivery system. Eligibility criteria for participation in the study included age between 14 and 17 years and a diagnosis of T1D before 8 years of age. Randomization to either a hybrid closed-loop or standard diabetes care group was performed …


Exploring The Inter-Relationship Between Cognitive And Motor Function In People With Lower Limb Amputations, Humberto Adolfo Omaña Moreno Aug 2022

Exploring The Inter-Relationship Between Cognitive And Motor Function In People With Lower Limb Amputations, Humberto Adolfo Omaña Moreno

Electronic Thesis and Dissertation Repository

The main objective of the present dissertation was to expand our understanding of the inter-relationship between cognition and mobility in people with lower limb amputations (PLLA). Study 1 systematically reviewed the literature to assess the effects of dual-task testing on the balance and gait of PLLA. A total of twenty-two studies were included. Overall, PLLA demonstrated a disproportionately greater dual-task effect than controls, characterized by increased sway velocity and reduced pace and rhythm, and increased asymmetry when balance or walking was paired with a secondary task. Additionally, the dual-task effect was not influenced by differences in etiology, level of amputation, …


Functional Neuroimaging Techniques To Examine Falls And Cognition In Older Adults: A Systematic Review, Tia M. Seleem, Raphael Gabiazon Aug 2022

Functional Neuroimaging Techniques To Examine Falls And Cognition In Older Adults: A Systematic Review, Tia M. Seleem, Raphael Gabiazon

Undergraduate Student Research Internships Conference

Falls in older adults have been attributed to impaired cognition. There is potential for neuroimaging techniques to understand the biological components that are involved in the cognitive processes pertaining to falls. Therefore, the purpose of this systematic review was to analyze how functional neuroimaging can be used to examine the relationship between falls and cognition among older adults. The following five electronic databases were selected to identify peer-reviewed articles in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses: 1) Medline (via OVID), 2) PsycINFO (via OVID), 3) CINAHL (via EBSCO), 4) EMBASE (via OVID), and 5) Pubmed. …


Assessing Cognitive Health Outcomes In Anca-Associated Vasculitis Patients, Ruo Yan Chen Aug 2022

Assessing Cognitive Health Outcomes In Anca-Associated Vasculitis Patients, Ruo Yan Chen

Undergraduate Student Research Internships Conference

Anti-neutrophilic cytoplasmic antibody (ANCA)-associated vasculitis (AAV) is a rare and life-threatening autoimmune disease with severe complications. Central nervous system (CNS) involvement is thought to be rare, however, the prevalence of neuropsychiatric complications have been reported in 30-60% of AAV cases. Studies looking at the cognitive health outcomes of AAV patients with CNS involvement have noted cognitive impairment as a significant contributor to reduced quality of life with unique challenges in care and treatment. The data collected from this primary output could be combined with global assessments of cognitive function as well as the application of advanced imaging tools to study …


Visually Identified Tau 18f-Mk6240 Pet Patterns In Symptomatic Alzheimer's Disease, Natasha Krishnadas, Kun Huang, Stephanie A. Schultz, Vincent Doré, Pierrick Bourgeat, Anita M. Y. Goh, Fiona Lamb, Svetlana Bozinovski, Samantha C. Burnham, Joanne S. Robertson, Simon M. Laws, Paul Maruff, Colin L. Masters, Victor L. Villemagne, Christopher C. Rowe Aug 2022

Visually Identified Tau 18f-Mk6240 Pet Patterns In Symptomatic Alzheimer's Disease, Natasha Krishnadas, Kun Huang, Stephanie A. Schultz, Vincent Doré, Pierrick Bourgeat, Anita M. Y. Goh, Fiona Lamb, Svetlana Bozinovski, Samantha C. Burnham, Joanne S. Robertson, Simon M. Laws, Paul Maruff, Colin L. Masters, Victor L. Villemagne, Christopher C. Rowe

Research outputs 2022 to 2026

Background: In Alzheimer's disease, heterogeneity has been observed in the postmortem distribution of tau neurofibrillary tangles. Visualizing the topography of tau in vivo may facilitate clinical trials and clinical practice. Objective: This study aimed to investigate whether tau distribution patterns that are limited to mesial temporal lobe (MTL)/limbic regions, and those that spare MTL regions, can be visually identified using 18F-MK6240, and whether these patterns are associated with different demographic and cognitive profiles. Methods : Tau 18F-MK6240 PET images of 151 amyloid-β positive participants with mild cognitive impairment (MCI) and dementia were visually rated as: tau negative, limbic predominant (LP), …


Normal Aging In Mice Is Associated With A Global Reduction In Cortical Spectral Power And Network-Specific Declines In Functional Connectivity, Asher J Albertson, Eric C Landsness, Michelle J Tang, Ping Yan, Hanyang Miao, Zachary P Rosenthal, Byungchan Kim, Joseph C Culver, Adam Q Bauer, Jin-Moo Lee Aug 2022

Normal Aging In Mice Is Associated With A Global Reduction In Cortical Spectral Power And Network-Specific Declines In Functional Connectivity, Asher J Albertson, Eric C Landsness, Michelle J Tang, Ping Yan, Hanyang Miao, Zachary P Rosenthal, Byungchan Kim, Joseph C Culver, Adam Q Bauer, Jin-Moo Lee

2020-Current year OA Pubs

Normal aging is associated with a variety of neurologic changes including declines in cognition, memory, and motor activity. These declines correlate with neuronal changes in synaptic structure and function. Degradation of brain network activity and connectivity represents a likely mediator of age-related functional deterioration resulting from these neuronal changes. Human studies have demonstrated both general decreases in spontaneous cortical activity and disruption of cortical networks with aging. Current techniques used to study cerebral network activity are hampered either by limited spatial resolution (e.g. electroencephalography, EEG) or limited temporal resolution (e.g., functional magnetic resonance imaging, fMRI). Here we utilize mesoscale imaging …


Delay Of Gratification Dissociates Cognitive Control And Valuation Brain Regions In Healthy Young Adults, Bidhan Lamichhane, Elisa Di Rosa, Todd S Braver Aug 2022

Delay Of Gratification Dissociates Cognitive Control And Valuation Brain Regions In Healthy Young Adults, Bidhan Lamichhane, Elisa Di Rosa, Todd S Braver

2020-Current year OA Pubs

Delay of gratification (DofG) refers to an inter-temporal choice phenomenon that is of great interest in many domains, including animal learning, cognitive development, economic decision-making, and executive control. Yet experimental tools for investigating DofG in human adults are almost non-existent, and as a consequence, very little is known regarding the brain basis of core DofG behaviors. Here, we utilize a novel DofG paradigm, adapted for use in neuroimaging contexts, to examine event-related changes in neural activity as healthy young adult participants made repeated choices to continue waiting for a delayed reward, rather than take an immediately available one of lesser …


Corpora Amylacea Are Associated With Tau Burden And Cognitive Status In Alzheimer's Disease, Connor M Wander, Tamy Harumy Moraes Tsujimoto, John F Ervin, Chanung Wang, Spencer M Maranto, Vanya Bhat, Julian D Dallmeier, Shih-Hsiu Jerry Wang, Feng-Chang Lin, William K Scott, David M Holtzman, Todd J Cohen Aug 2022

Corpora Amylacea Are Associated With Tau Burden And Cognitive Status In Alzheimer's Disease, Connor M Wander, Tamy Harumy Moraes Tsujimoto, John F Ervin, Chanung Wang, Spencer M Maranto, Vanya Bhat, Julian D Dallmeier, Shih-Hsiu Jerry Wang, Feng-Chang Lin, William K Scott, David M Holtzman, Todd J Cohen

2020-Current year OA Pubs

Corpora amylacea (CA) and their murine analogs, periodic acid Schiff (PAS) granules, are age-related, carbohydrate-rich structures that serve as waste repositories for aggregated proteins, damaged cellular organelles, and other cellular debris. The structure, morphology, and suspected functions of CA in the brain imply disease relevance. Despite this, the link between CA and age-related neurodegenerative diseases, particularly Alzheimer's disease (AD), remains poorly defined. We performed a neuropathological analysis of mouse PAS granules and human CA and correlated these findings with AD progression. Increased PAS granule density was observed in symptomatic tau transgenic mice and APOE knock-in mice. Using a cohort of …


The Effects Of Physical Function And Genetics On Cognition And Blood Biomarkers In Individuals At-Risk For Alzheimer’S Disease And Related Dementias, Joshua Louis Gills Aug 2022

The Effects Of Physical Function And Genetics On Cognition And Blood Biomarkers In Individuals At-Risk For Alzheimer’S Disease And Related Dementias, Joshua Louis Gills

Graduate Theses and Dissertations

Alzheimer’s disease and related dementia (ADRD) rates are expected to triple by the year 2050. Early detection and specific mitigation efforts are warranted to blunt the alarming rate. Physical function (PF) declines with age, but higher physical function is associated with better cognitive functioning in middle-to- older age individuals. Moreover, greater physical activity (PA) is associated with better global cognition; however, Apoliporotein e4 carriers may not gain the same benefits with exercise. Additionally, plasma phosphorylated tau 217 (p-tau217) has been identified as a novel diagnostic ADRD biomarker which needs further research to examine associations with risk factors. Therefore, the aims …


Sex Differences In The Genetic Architecture Of Cognitive Resilience To Alzheimer's Disease., Jaclyn M Eissman, Logan Dumitrescu, Emily R Mahoney, Alexandra N Smith, Shubhabrata Mukherjee, Michael L Lee, Phoebe Scollard, Seo Eun Choi, William S Bush, Corinne D Engelman, Qiongshi Lu, David W Fardo, Emily H Trittschuh, Jesse Mez, Catherine C Kaczorowski, Hector Hernandez Saucedo, Keith F Widaman, Rachel F Buckley, Michael J Properzi, Elizabeth C Mormino, Hyun Sik Yang, Theresa M Harrison, Trey Hedden, Kwangsik Nho, Shea J Andrews, Douglas Tommet, Niran Hadad, R Elizabeth Sanders, Douglas M Ruderfer, Katherine A Gifford, Xiaoyuan Zhong, Neha S Raghavan, Badri N Vardarajan, Margaret A Pericak-Vance, Lindsay A Farrer, Li San Wang, Carlos Cruchaga, Gerard D Schellenberg, Nancy J Cox, Jonathan L Haines, C Dirk Keene, Andrew J Saykin, Eric B Larson, Reisa A Sperling, Richard Mayeux, Michael L Cuccaro, David A Bennett, Julie A Schneider, Paul K Crane, Angela L Jefferson, Timothy J Hohman Jul 2022

Sex Differences In The Genetic Architecture Of Cognitive Resilience To Alzheimer's Disease., Jaclyn M Eissman, Logan Dumitrescu, Emily R Mahoney, Alexandra N Smith, Shubhabrata Mukherjee, Michael L Lee, Phoebe Scollard, Seo Eun Choi, William S Bush, Corinne D Engelman, Qiongshi Lu, David W Fardo, Emily H Trittschuh, Jesse Mez, Catherine C Kaczorowski, Hector Hernandez Saucedo, Keith F Widaman, Rachel F Buckley, Michael J Properzi, Elizabeth C Mormino, Hyun Sik Yang, Theresa M Harrison, Trey Hedden, Kwangsik Nho, Shea J Andrews, Douglas Tommet, Niran Hadad, R Elizabeth Sanders, Douglas M Ruderfer, Katherine A Gifford, Xiaoyuan Zhong, Neha S Raghavan, Badri N Vardarajan, Margaret A Pericak-Vance, Lindsay A Farrer, Li San Wang, Carlos Cruchaga, Gerard D Schellenberg, Nancy J Cox, Jonathan L Haines, C Dirk Keene, Andrew J Saykin, Eric B Larson, Reisa A Sperling, Richard Mayeux, Michael L Cuccaro, David A Bennett, Julie A Schneider, Paul K Crane, Angela L Jefferson, Timothy J Hohman

Faculty Research 2022

Approximately 30% of elderly adults are cognitively unimpaired at time of death despite the presence of Alzheimer's disease neuropathology at autopsy. Studying individuals who are resilient to the cognitive consequences of Alzheimer's disease neuropathology may uncover novel therapeutic targets to treat Alzheimer's disease. It is well established that there are sex differences in response to Alzheimer's disease pathology, and growing evidence suggests that genetic factors may contribute to these differences. Taken together, we sought to elucidate sex-specific genetic drivers of resilience. We extended our recent large scale genomic analysis of resilience in which we harmonized cognitive data across four cohorts …


Sex Differences In The Genetic Architecture Of Cognitive Resilience To Alzheimer's Disease, Jaclyn M Eissman, Carlos Cruchaga, Et Al. Jul 2022

Sex Differences In The Genetic Architecture Of Cognitive Resilience To Alzheimer's Disease, Jaclyn M Eissman, Carlos Cruchaga, Et Al.

2020-Current year OA Pubs

Approximately 30% of elderly adults are cognitively unimpaired at time of death despite the presence of Alzheimer's disease neuropathology at autopsy. Studying individuals who are resilient to the cognitive consequences of Alzheimer's disease neuropathology may uncover novel therapeutic targets to treat Alzheimer's disease. It is well established that there are sex differences in response to Alzheimer's disease pathology, and growing evidence suggests that genetic factors may contribute to these differences. Taken together, we sought to elucidate sex-specific genetic drivers of resilience. We extended our recent large scale genomic analysis of resilience in which we harmonized cognitive data across four cohorts …