Medicine and Health Sciences Commons^™

Data-Driven Neuroanatomical Subtypes In Various Stages Of Schizophrenia: Linking Cortical Thickness, Glutamate, And Language Functioning, Liangbing Liang

Electronic Thesis and Dissertation Repository

The considerable variation in the spatial distribution of cortical thickness changes has been used to parse heterogeneity in schizophrenia. We aimed to recover a ‘cortical impoverishment’ subgroup with widespread cortical thinning. We applied hierarchical cluster analysis to cortical thickness data of three datasets in different stages of psychosis and studied the cognitive, functional, neurochemical, language and symptom profiles of the observed subgroups. Our consensus-based clustering procedure consistently produced a subgroup characterized by significantly lower cortical thickness. This ‘cortical impoverishment’ subgroup was associated with a higher symptom burden in a clinically stable sample and higher glutamate levels with language impairments in …

A Life Lived With Schizophrenia: When Mother’S Love Is Kept In The Dark Exploring Maternal Communication And Attachment Organization In Families With Schizophrenia, Myrsini Stefanidou Marini

Electronic Theses and Dissertations

In recent years, research into the transgenerational transmission of attachment styles has shown that a mother’sattachment style often predicts the attachment style of her infant. Fearsome parental behavior has been found to predict disorganized attachment in infants, which is further associated with a range of mental health disturbances in adolescence. Furthermore, regular patterns of disturbed communication between mother and child have also been found to lead to ‘schizophrenic’ thinking and behavior in the child’s life. While acknowledging that genetic and other biological factors contribute to the emergence of schizophrenia, this study focused on disorganized attachment and disturbed communication between mother …

A Comparison Of Stigma Levels For Individuals With Psychological Disorders And Individuals With Intellectual Disabilities, Isabella E. Wood

Honors Theses

This study compared nine aspects of stigmatization (blame, anger, pity, help, dangerousness, fear, avoidance, segregation, coercion) amongst schizophrenia, binge eating, and intellectual disabilities. The overall MANOVA was significant, F(18, 183) = 89.95, p < .001, Wilks’ Lambda = .10. When the results for the dependent variables were considered separately, all nine dependent variables reached significance (p < .001). Schizophrenia scored highest in all categories except blame and pity. Blame was the highest for binge eating and pity was the highest for intellectual disabilities. Efforts to reduce stigmatization must be tailored to each disorder.

Examination Of Common And Rare Variant Genetic Architecture Of Psychiatric Disorders, Mohammad Ahangari

Theses and Dissertations

Psychiatric disorders are often heterogenous in their manifestation and genome-wide association studies have identified many common risk variants involved in their polygenic architectures with varying degrees of pleiotropy. In recent years, large-scale biobanks have also begun sequencing the genome of their participants to elucidate the role of rare risk variation in the genetic architecture of complex phenotypes, including psychiatric traits. This dissertation sought to better understand the role of both common and rare risk variation in the genetic architecture of psychiatric disorders with a particular focus on schizophrenia and alcohol problems. In the first three analyses, we focused on characterizing …

Schizophrenia And Genomics, Tiffini Lasch

Nursing Student Class Projects (Formerly MSN)

There are several advancements in genomics under specific categories, such as cancer and autism. Mental health is one of the leading diseases to cause a significant debt burden in today's society. However, genomics has not translated well into mental health treatment. One area of focus is schizophrenia. Those with schizophrenia suffer from severe and devastating symptoms. The symptoms can lead to harsh complications. Which can make it impossible to function in everyday life. Many believe it is not just genetics alone, but also environmental factors that contribute to schizophrenia. Through large genome-wide associated studies, discoveries are being made. There have …

Exploring The Heteromeric Interface Of The 5-Ht2a-Mglu2 Receptor Complex, Mohamed Aarif Abdul Kareem

Theses and Dissertations

Schizophrenia is a serious mental disorder characteristic of several neurotransmitters including dopamine, serotonin, and glutamate being in imbalance. Early therapies focused solely on dopamine antagonism and second-generation antipsychotics focused on the dopamine and serotonin systems and their respective G protein coupled receptor (GPCR) proteins. Although debate for dimerization of certain classes of GPCR exist, the establishment of an mGlu2-5-HT_2A heterocomplex, which is implicated in schizophrenia is of interest. Previous studies have used a mutation-based approach to identify transmembrane domain 4 (TM4) as the domain responsible in mGlu2 for mediating heteromerization before narrowing down the individual amino acids responsible for …

Ontrack: A Program Evaluation, Justin Mynatt

Doctoral Projects

OnTrack is a program that provides coordinated specialty care (CSC) services for patients who have experienced their first episode of psychosis (FEP). Appropriately identifying and aggressively treating this vulnerable population, while providing support to both them and their families is critical for improved outcomes. Appropriate treatment of FEP patients can improve their quality of life, preserve brain matter, improve overall functioning, and lessen the burden of the clients’ family who may be involved in their care, such as caregiver strain or financial hardship. The purpose of this project is to evaluate the success of OnTrack, a FEP program, at improving …

Do Not Miss Your Shot: Improving Follow-Up In Patients Receiving Long-Acting Injectable Medications, Mary O'Hara

Doctor of Nursing Practice Final Manuscripts

Background: Serious mental illness including schizophrenia and bipolar disorder affects 1 in 24 adults in California. These chronic disorders are difficult to treat and often sabotaged by medication nonadherence. Long-acting injectable (LAI) medications are one strategy to combat medication nonadherence. Effectively providing treatment with LAI medications can be challenging at the clinic level.

Objectives: Reduce the number of days without medication by reducing the number of days between injection due date and injection administration for patients receiving LAI medications.

Design: Establish appointments for all injection visits. Standardize visit protocol for injection encounters to optimize provider time. Arrange immediate follow-up and …

A Meta-Analytic Review Of Cognitive Functioning In Negative And Positive Symptoms Of Schizophrenia, Tiffany Forsythe

Electronic Theses and Dissertations

The purpose of the study was to conduct two meta-analytic reviews examining cognitive functioning and schizophrenia. The first review examined the literature comparing the cognitive functioning of schizophrenic patients to healthy controls. A second review examined the cognitive functioning within schizophrenic patients, examining the differences between individuals with primarily positive symptomatology and those with primarily negative symptomatology. The first meta-analysis included 19 studies which assessed 861 schizophrenic patients and 858 healthy volunteers overall. The second meta-analysis included 10 studies comparing the cognitive functioning of 1,263 schizophrenics across positive and negative symptoms. Results of the first review indicated that healthy controls …

The Effects Of Two Novel Anti-Inflammatory Compounds On Prepulse Inhibition And Neural Microglia Cell Activation In A Rodent Model Of Schizophrenia, Heath W. Shelton

Electronic Theses and Dissertations

Recent studies have shown elevated neuroinflammation in a large subset of individuals diagnosed with schizophrenia. A pro-inflammatory cytokine, tumor necrosis factor-alpha (TNFα), has been directly linked to this neuroinflammation. This study examined the effects of two TNFα modulators (PD2024 and PD340) produced by our collaborators at P2D Bioscience, Inc., to alleviate auditory sensorimotor gating deficits and reduce microglial cell activation present in the polyinosinic:polycytidylic (Poly I:C) rodent model of schizophrenia. Auditory sensorimotor gating was assessed using prepulse inhibition and microglial activation was examined and quantified using immunohistochemistry and confocal microscopy, respectively. Both PD2024 and PD340 alleviated auditory sensorimotor gating deficits …

Does Metacognitive Training Improve The Quality Of Life In Patients With Schizophrenia?, Amy Wei

PCOM Physician Assistant Studies Student Scholarship

Objective: The objective of this selective EBM review is to determine whether or not “Does metacognitive training (MCT) improve the quality of life in patients with schizophrenia?”

Study Design: Systematic review of three randomized controlled trials (RCTs) published in peer-reviewed journals between 2010-2014, all in the English language; two of which were published in 2014 and one in 2010.

Data Sources: Three randomized controlled trials found using PubMed.

Outcomes Measured: Quality of life with a focus on social relationships was assessed using the Brief Quality of Life Questionnaire of the World Health Organization (WHOQOL-BREF) or Quality of Life Scale (QLS). …

Is The Use Of Omega-3 Polyunsaturated Fatty Acids As Adjunctive Therapy Effective In Reducing Symptom Severity In Adult Schizophrenia Patients?, Desiree Goenaga

PCOM Physician Assistant Studies Student Scholarship

OBJECTIVE: The objective of this selective EBM review is to determine whether or not the use of omega-3 polyunsaturated fatty acids (PUFA) as adjunctive therapy is effective in reducing symptom severity in adult schizophrenia patients.

STUDY DESIGN: A selective review of three peer-reviewed, double-blind, randomized, placebo-controlled trials published between the years of 2008 and 2016.

DATA SOURCES: All three randomized control trials were published in English and were selected from peer-reviewed journals via EmBase and PubMed based on relevance to the clinical question posed above and that the outcomes measured in the studies mattered to patients, or were “patient oriented.” …

Inviting Hallucinatory Percepts During Speech-Listening To Detect Cognitive Changes In Early Psychosis, Ana-Bianca Popa

Electronic Thesis and Dissertation Repository

Treatment outcomes for people with schizophrenia are more favourable if treatment starts early in the course of the disorder. Current detection methods lack specificity and do not make use of cognitive markers. We presented individuals experiencing a first episode of psychosis (FEP) and matched control participants with acoustically degraded meaningful and matched nonsense sentences to examine the degree to which people reported words that were not actually presented. Intrusion errors were counted when reported words were unrelated to words in the original sentence. Intelligibility (measured as words reported correctly) did not differ between groups but intrusion errors were more frequent …

Schizophrenia And Its Effects On An American Family: A Call To Action For The 21st Century, Cynthia Newton Captain

Senior Theses

Our country’s healthcare system is at a moral crossroads. The way we treat those whom we call “the homeless” is deplorable. The majority of the homeless are mentally ill and need treatment. Our country needs to treat those with the severe brain diseases of schizophrenia, schizo-affective disorder, and bi-polar disorder just as we would Alzheimer’s disease and Parkinson’s disease. Those with severe mental illness, who have no insight into their illness, should not be allowed to dictate their own treatment. If a homeless person is brought to San Francisco General Hospital and is found to be a schizophrenic in psychiatric …

The Effects Of Abilify On Memory, Coordination, And Stereotypy In Cd-1 Mice, Jostein Andersen

Undergraduate Honors College Theses 2016-

The atypical antipsychotic Abilify is the second most popular treatment for schizophrenia and other related disorders. Its popularity and wide use is due to its unique pharmacological profile, working differently at dopamine and serotonin receptors compared to other antipsychotics. Schizophrenia is an infamous mental dysfunction involving cognitive impairment, positive symptoms, and negative symptoms. The current study investigated Abilify’s effect in a dose-dependent manner on memory, coordination and stereotypic movement. The sample consisted of 15 male and 15 female CD-1 mice. Memory was tested in a cognitive maze, the Rota-Rod series 8 model measured coordination, and the Coulbourn Tru-Scan Activity Box …

Target Validation And Pharmacological Characterization Of Novel Nmdar Modulators, Kiran Sapkota

Theses & Dissertations

The N-methyl-D aspartate receptors (NMDARs) are ligand-gated ion channels, which play important roles in learning and memory. Excessive activity of NMDARs is implicated in damage due to stroke and neurodegenerative diseases, whereas hypoactivity of NMDARs contributes to schizophrenia. The initial goal of my dissertation is to evaluate the potential role of the GluN2D-containing NMDARs in neuropathological, behavioral and cognitive alterations associated with schizophrenia and characterize the pharmacology and mechanisms of action of NMDAR modulators which could potentially be used to modulate these receptors in schizophrenia.

A subanesthetic dose of the NMDAR antagonist ketamine elicits symptoms of schizophrenia. This property led …

Measuring Brain Serine With Proton Magnetic Resonance Spectroscopy At 3.0 Tesla, Homa Javadzadeh

Electronic Thesis and Dissertation Repository

Proton magnetic resonance spectroscopy (MRS) non-invasively measures regional human brain chemistry in vivo, providing concentration estimates for several metabolites in a pre-selected region of interest. MRS has been applied to investigations of disease-related metabolic and neurochemical alterations in schizophrenia since the early 90’s.

The objective of this research is to implement a metabolite-selective MRS method to quantify endogenous concentrations of human brain serine. Serine is a naturally-occurring amino acid and an important co-modulator of the N-Methyl D-aspartic Acid (NMDA) glutamate receptor. Glutamate abnormalities have been implicated in the pathophysiology of schizophrenia, especially its so-called negative and cognitive symptoms, which can …

The Method Of Madness: A Brief Biography Of Schizophrenia, Riley Hawkins

Honor Scholar Theses

No abstract provided.

Neurologists Look At Causes Of Baffling Brain Condition, Maggie Freleng

Capstones

It can be hard getting help for someone with mental illness, but almost impossible when that person doesn't think they are sick. At at least half of people with schizophrenia, for example, insist that the voices they hear are real. People who do not know they are ill often refuse therapy and medication -- and their symptoms can spiral out of control. Doctors call this lack of awareness anosognosia. Neurologists are trying to discover what causes this baffling condition--and how to treat it.

Addressing Very Short Stimulus Encoding Times In Modeling Schizophrenia Cognitive Deficit, Colleen D. Cutler

Electronic Thesis and Dissertation Repository

It is well known that encoding times in persons with schizophrenia are longer than those of normal controls. Neufeld and others have argued that this is the consequence of additional subprocesses being executed during the encoding process in the case of schizophrenia. In general they expressed an encoding time as the sum of $k^{\prime}$ independent exponentially-distributed subprocesses, each executed with rate $v$. A troubling consequence of their application of this model to real data was that under some circumstances some individuals appeared to encode instantaneously. This was accommodated in Neufeld et al. by placing a Poisson distribution on …

Does The Addition Of Piracetam Safely And Effectively Improve Behavioral And Or Cognitive Functions In Schizophrenia?, Dieu Linh Nguyen

PCOM Physician Assistant Studies Student Scholarship

OBJECTIVE: The objective of this selective evidence based medicine (EBM) review is to determine whether or not the addition of piracetam safely and effectively improve behavioral and or cognitive functions in schizophrenia.

STUDY DESIGN: The selected review from all English language, primary literature sources that were published between 1979 and 1999.

DATA SOURCES: Three double blind randomized controlled trials (RCT) and one case controlled clinical study that compared piracetam to a visually matched placebo was selected and found using Medline, PubMed, Ebscohost, and Cochrane databases.

OUTCOMES MEASURED: Each of the trials assessed the effect of Piracetam on behavioral and …

Is Animal Assisted Therapy Using Dogs An Effective Treatment For Positive And Negative Symptoms For Adult Inpatient Schizophrenics?, Brian Davidson

PCOM Physician Assistant Studies Student Scholarship

OBJECTIVE: The objective of this selective EBM review is to determine whether or not Animal Assisted Therapy (AAT) using dogs is an effective treatment for positive and negative symptoms for adult inpatient schizophrenics.

STUDY DESIGN: Systematic review of 3 articles published in English in peer reviewed journals between 2005-2009

DATA SOURCES: Two randomized controlled trials and one allocation by minimization controlled trial comparing the effects of AAT using dogs on positive and negative symptoms of schizophrenia to control groups. All articles were found using PubMed and PROQuest

OUTCOMES MEASURED: Focused questionnaires were given before and after …

Identifying Functional Variation In Schizophrenia Gwas Loci By Pooled Sequencing, Erik Loken

Theses and Dissertations

Schizophrenia demonstrates high heritability in part accounted for by common simple nucleotide variants (SNV), rare copy number variants (CNV) and, most recently, rare SNVs Although heritability explained by rare SNVs and CNVs is small compared to that explained by common SNVs, rare SNVs in functional sequences may identify specific disease mechanisms. However, current exome methods do not capture a large proportion of potentially functional bases where rare variation may impact disease risk: as much as two-thirds of conserved sequences lie outside the exome in non-coding regions of cross-species evolutionary constraint. We reasoned that the candidate loci from the Psychiatric Genomics …

Affect Identification And Interpersonal Skills: An In-Depth Evaluation Of Social Cognition In Schizophrenia, Griffin Pollock Sutton

UNLV Theses, Dissertations, Professional Papers, and Capstones

The presence of deficits in various sub-domains of social cognition has been investigated to a degree in individuals with schizophrenia. Some of the most commonly researched and documented deficits have included impairments in the identification of affect portrayed in faces. Research has indicated that the performance of individuals with schizophrenia on such tasks is generally impaired as compared to normal controls. However, some have questioned the generalizability of such findings to real-world situations, as day-to-day interactions generally necessitate a constant, fluid assessment of the thoughts and feelings of others and are rarely, if ever, limited to still images of others. …

Using Negative Feedback To Guide Behavior: Impairments On The Wisconsin Card Sorting Test Relates To Psychosis, Sally Barney

UNLV Theses, Dissertations, Professional Papers, and Capstones

There is increasing controversy regarding the distinction between schizophrenia and bipolar disorder as separate diagnostic categories because these disorders share many features in common. These and other findings suggest that bipolar disorder and schizophrenia may be better conceptualized along a continuum or within more homogeneous subsets of affective, psychotic, and mixed symptomatology.

Dopamine dysregulation has been found in schizophrenia and bipolar disorder, particularly those that experience psychosis during the acute phases of their bipolar illness. Dopamine has been found to play a role in reward and reward learning. Recently, research has found that individuals with schizophrenia experience deficits in reward …

The Neuropsychological Effects Of Combined Physical And Mental Exercise In Schizophrenia, Maggie M. Manning

Honors Theses

People suffering from severe mental disorders encounter many debilitating side effects. Those diagnosed with schizophrenia face a large number of challenges each day. Not only must they endure symptoms, like hallucinations and delusions, commonly associated with the illness, but their higher-level cognitive functioning is further impaired in numerous ways. People with schizophrenia, suffering from thought disorder, battle with a pattern of disorganized thinking in which seemingly simple tasks, i.e attention and memory, are difficult. Negative symptoms include the inability to establish social relationships, and hinder their everyday experiences, including work. Their extremely sedentary lifestyle also negatively impacts engagement in other …

Public Opinions Of Schizophrenia, Amy Guiomard

Honors Theses

Schizophrenia is a psychotic disorder characterized by disturbances in thought, behavior, and communication that last longer than 6 months (American Psychiatric Association, 2000). The symptoms of schizophrenia are often so severe that the individual is unable to function normally in society. The resulting erratic behavior, combined with misinformation about the disorder in general, leads to the negative stigma now associated with the disorder. The research presented here evaluates public stigmatization towards schizophrenics; it also explores the similarities between behavior due to racial stereotyping and behavior based on stigmatization of schizophrenics.

Elucidating The Role Of The Α7 Nicotinic Receptor In The Etiology Of Schizophrenia., Michelle Johnson Chandley

Electronic Theses and Dissertations

The α7 subunit of the nicotinic receptor, a ligand gated ion channel with an affinity for nicotine, has long been implicated in the pathophysiology of schizophrenia due to the extremely high rate of smoking within the patient population. However, the exact role of the receptor has never fully been determined. In the following studies, various functions the receptor may assume in disease state are evaluated. There is a strong relationship between the immune system and schizophrenia, with the α7 subunit possibly serving as the link between the two. One of the following studies looks at the possibility of the receptor …

The Effects Of Nicotine Conditioned Place Preference In D2 Primed Adolescent Rats: Age-Related And Gender Effects., Yoko Emily Ogawa

Electronic Theses and Dissertations

This study investigated nicotine conditioned place preference (CPP) in two different ages of adolescence using a rodent model of schizophrenia. Both 2- and 3-chambered CPP apparatuses were used to test whether the CPP was due to an aversion to the white chamber. Animals were neontally treated with the dopamine D₂/D₃ agonist, quinpirole, or saline and raised to either early postweanling age (P 22) or adolescence (P 29). Rats were conditioned to prefer the white chamber using nicotine. Results showed that nicotine induced CPP and appeared to alleviate an increased stress response in D₂ primed animals, which …

Nicotine Sensitization In A Rodent Model Of Schizophrenia: A Comparison Of Adolescents, Adults, And Neurotrophic Factors., Marla Kay Perna

Electronic Theses and Dissertations

The behavioral effects of nicotine on locomotor activity in a rodent model of psychosis were analyzed. This model is based on neonatal quinpriole treatment (a dopamine D2/D3 agonist) which causes increased D2 receptor sensitivity, a phenomenon known as D2 priming that is common in schizophrenia. D2-primed adolescent rats did not demonstrate nicotine-induced hypoactivity early in training, and males demonstrated more rapid sensitization to nicotine as compared to controls administered nicotine. D2-primed females administered nicotine demonstrated increased stereotypic behavior. D2-primed adult rats given nicotine demonstrated significantly more robust sensitization to nicotine than controls given nicotine. Brain-derived neurotrophic factor (BDNF) was analyzed …