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Articles 1 - 30 of 63
Full-Text Articles in Behavioral Neurobiology
Ketamine Pre-Exposure Does Not Influence Later-Life Responses To Reward-Related Stimuli In Female C57bl/6 Mice, Israel Garcia
Ketamine Pre-Exposure Does Not Influence Later-Life Responses To Reward-Related Stimuli In Female C57bl/6 Mice, Israel Garcia
Open Access Theses & Dissertations
Preclinical work indicates that exposure to traditional antidepressant medications, in adolescent and adult female subjects, alters reward-related behavior later in life. In recent years, the anesthetic ketamine (KET), now used as a fast-acting antidepressant, has shown promising therapeutic efficacy for the management of depression. However, the potential long-term behavioral consequences of KET exposure across development have not been thoroughly assessed. Thus, to address this issue, we examined if KET exposure, during adolescence or early adulthood, results in enduring alterations in responsivity to the rewarding properties of sucrose and cocaine later in life. Specifically, female C57BL/6 mice were randomly assigned to …
Behavioral Ecology Of A Desert Ambush Predator: Assessing Movement Patterns, Habitat And Microhabitat Use, And The Innate Feeding Response Of Eastern Black-Tailed Rattlesnakes (Crotalus Ornatus) In The Northern Chihuahuan Desert, James Emerson
Open Access Theses & Dissertations
Research on the ecology and evolution of rattlesnakes has been sporadic over the past 80 years, but has seen recent expansion into the diverse fields of physiology, physiological ecology, life history, behavioral ecology, ethology, reproductive biology, chemical ecology, venom biochemistry and medicine, conservation, and many other subdisciplines. The development of small, implantable VHF radiotransmitters in the 1980s revolutionized research in the field of behavioral ecology for rattlesnakes, which are uniquely suited for radiotelemetry studies because they possess several morphological, physiological, and behavioral characteristics that are unique among terrestrial vertebrates. The widespread application of radiotelemetry by the mid-1980s advanced the model …
U.S. Perceptions Of Economic Mobility Since The Enactment Of Nafta And Their Impact On American Politics And Society, Jairemy Quinton Edwards
U.S. Perceptions Of Economic Mobility Since The Enactment Of Nafta And Their Impact On American Politics And Society, Jairemy Quinton Edwards
Open Access Theses & Dissertations
In this study, I examine how perceptions of NAFTA developed over 20 years since its enactment, measured as perceived economic mobility in 2016, have affected more recent public perceptions leading to increased, controversial tendencies towards nationalism, protectionism, and pessimism about the future of the U.S. economy. I then assess whether and how such perceptions in turn may have affected voter perceptions about Donald Trump, setting the stage for his 2016 election victory. Therein, I have found that among U.S. voters in 2016, those with perceptions of reduced economic mobility since the enactment of NAFTA were significantly more likely to have …
The Language Content Of Computer-Mediated Versus Face-To-Face Motivational-Type Interviews, Karla Deyanira Llanes
The Language Content Of Computer-Mediated Versus Face-To-Face Motivational-Type Interviews, Karla Deyanira Llanes
Open Access Theses & Dissertations
Motivational Interviewing (MI) is an extensively used technique to facilitate behavior change by increasing a person's own motivation and commitment toward change. Recently, several innovative and effective ways to conduct motivational interviews have emerged. However, one potential option has not been investigated: the utility of conducting a motivational interview via computer. The current study begins to address this gap in knowledge by comparing the language content of computer-mediated motivational-type interviews and face-to-face motivational-type interviews. The motivational-type interviews were conducted with young adults who reported ambivalence about their level of recreational marijuana use. Specifically, non-marijuana users, occasional marijuana users, and frequent …
Functional Investigation Of A Brainstem Excitatory Connection Relevant To Sensorimotor Gating, Luis Enrique Martinetti
Functional Investigation Of A Brainstem Excitatory Connection Relevant To Sensorimotor Gating, Luis Enrique Martinetti
Open Access Theses & Dissertations
To focus attention, our brain has to "gate" or block irrelevant sensory information that could lead to brain overload. This is done by way of a neuronal pre-attentive mechanism termed sensorimotor gating (SG). Therefore, deficits in the SG mechanism prevent patients from focusing attention. SG deficits have been observed in patients suffering from various neurological disorders, and it is a hallmark of schizophrenia. Previous work has identified key brain areas, such as the pedunculopontine tegmental nucleus (PPTg), that send inputs to the brainstem to regulate SG. However, there is still a knowledge gap concerning what cell types are involved and …
Insulin Modulates The Strong Reinforcing Effects Of Nicotine And Changes In Insulin Biomarkers In A Rodent Model Of Diabetes, Bryan Cruz
Open Access Theses & Dissertations
This study examined whether the strong reinforcing effects of nicotine and changes in insulin biomarkers observed in diabetic rats are modulated via insulin. A model of diabetes was employed involving administration of streptozotocin (STZ), which produces hypoinsulinemia in rats. The present study included vehicle- or STZ-treated rats that received sham surgery or an insulin pellet. Two-weeks later, the rats were given extended access to intravenous self-administration (IVSA) of saline or nicotine. Concomitant changes in food intake, water responses, and body weight were assessed during 12 days of IVSA. After the last session, plasma levels of insulin, leptin, amylin, and glucagon-like …
A Behavioral And Neuroimmune System Model Of The Effects Of Chronic Low-Level Lead Exposure In Young Male C57bl/6j Mice, Mayra Gisel Flores-Montoya
A Behavioral And Neuroimmune System Model Of The Effects Of Chronic Low-Level Lead Exposure In Young Male C57bl/6j Mice, Mayra Gisel Flores-Montoya
Open Access Theses & Dissertations
Chronic low-level lead exposure reduces memory in children however the brain mechanisms mediating these effects are not known. In previous studies we showed that early lead exposure reduced olfactory memory and exploratory behavior in young mice, and reduced microglia cell density in hippocampus/dentate gyrus. The present studies aimed to identify additional behavioral tests that were sensitive to early low-level lead exposure in young mice; and to examine whether microglia upregulated factors known to promote cell migration. Seventy-two C57BL/6J male mice were exposed to 0 ppm (controls), 30 ppm (low-dose), or 430 ppm (high-dose) of lead acetate via dams' milk from …
Predatory Behavior And Neuroanatomy Of The Sessile Rotifer, Cupelopagis Vorax , Elizabeth Preza
Predatory Behavior And Neuroanatomy Of The Sessile Rotifer, Cupelopagis Vorax , Elizabeth Preza
Open Access Theses & Dissertations
Predator-prey interactions contribute to the evolution of behavioral and morphological characteristics of species. However, research on zooplankton has mainly focused on planktonic species such Mesocyclops edax (Arthropoda, Cyclopoida) and Asplanchna spp. (Rotifera, Ploima). Cupelopagis vorax (Rotifera, Collothecaceae) provides a unique model for studying the predatory behavior of a sessile species. Cupelopagis was chosen because it is the only rotifer known to exhibit rheotaxic behaviors in the presence of prey and because it undergoes indirect development where non-feeding, free-swimming larvae mature into feeding adults. The integration of behavioral techniques, immunohistochemistry, and confocal microscopy were used to provide insight as to how …
Octopamine In Sexual Behavior, Ana Isabel Fernandez
Octopamine In Sexual Behavior, Ana Isabel Fernandez
Open Access Theses & Dissertations
Octopamine is a biogenic amine neuromodulator present in neuronal and non-neuronal tissues in invertebrates (Roeder, 1999). It modulates numerous physiological processes such as motivation, pheromone response, olfaction, ovulation, learning and memory. Octopamine together with its precursor tyramine have roles restricted only to invertebrates (Roeder, 1999). It is believed that octopamine is the invertebrate homolog of norepinephrine, a catecholamine present in mammals that acts as a neuromodulator in the sympathetic and central nervous systems. Both octopamine and norepinephrine are derived from the same amino acid tyrosine and are monoamine neurotransmitters. The main objective of this study is to understand the role …
Characterization Of Sex Differences In The Reinforcing Effects Of Nicotine, Rodolfo Jesus Flores Garcia
Characterization Of Sex Differences In The Reinforcing Effects Of Nicotine, Rodolfo Jesus Flores Garcia
Open Access Theses & Dissertations
It is presently unclear whether ovarian hormones, such as estradiol (E2) promote the reinforcing effects of nicotine in females. Thus, we compared extended access to nicotine intravenous self-administration (IVSA) in intact male, intact female, and OVX female rats (Study 1) as well as OVX females that received vehicle or E2 supplementation (Study 2). The E2 supplementation procedure involved a 4-day procedure involving 2 days of vehicle administration and 2 days of E2 administration. Two doses of E2 (25 or 250 ug) were assessed in separate groups of OVX females in order to examine the dose-dependent effects of this hormone on …
Mental Health Help-Seeking Intention And Organizational Climate In A Population Of Military Service Members, Mishaw Tyron Cuyler
Mental Health Help-Seeking Intention And Organizational Climate In A Population Of Military Service Members, Mishaw Tyron Cuyler
Open Access Theses & Dissertations
Historically, psychological effects of war such as Post Traumatic Stress Disorder (PTSD) have been understated and misdiagnosed throughout the world. Military members that displayed symptoms of PTSD such as anxiety, depression, and sadness were thought to lack the strength and courage necessary to be a soldier. As a result, many soldiers suffering from symptoms of PTSD would suffer in silence and not seek the requisite help for mental health care. This Dissertation examines the mental health help-seeking intention of U.S. military service members using the Theory of Planned Behavior (TPB). Additionally, this Dissertation considers the effects that leadership support climate …
The Role Of The Dopamine/Ecdysteroid Receptor Dopecr In Ethanol Induced Behavioral Disinhibition, Gissel Pryscilla Aranda
The Role Of The Dopamine/Ecdysteroid Receptor Dopecr In Ethanol Induced Behavioral Disinhibition, Gissel Pryscilla Aranda
Open Access Theses & Dissertations
Ethanol, a main active ingredient of alcoholic beverages, exerts numerous effects on behavior through its interaction with diverse membrane and signaling molecules and effector cells. The effects include lack of motor control, behavioral disinhibition, tolerance, sensitization and addiction. In particular, behavioral disinhibition is typically associated with heavy drinking and can lead to detrimental consequences such as car accidents, violent rages, risky sexual behavior and illegal substance abuse. This research aimed to clarify the neural elements and cellular mechanisms underlying behavioral disinhibition induced by ethanol. The neurotransmitter dopamine (DA) is implicated in ethanol-induced behavioral disinhibition (Van Gaalen et al., 2006). To …
Rare Pride Campaigns: Evaluating Participatory Communication In Conservation Efforts Throughout Indonesia, Lauren Elizabeth Perez
Rare Pride Campaigns: Evaluating Participatory Communication In Conservation Efforts Throughout Indonesia, Lauren Elizabeth Perez
Open Access Theses & Dissertations
Communication scholars who study international development and social change have found that if facilitators of social change hope to find positive, lasting solutions to complex social and environmental issues, they must incorporate more participatory approaches. However, even the practitioners with the most noble intentions oftentimes fall short of facilitating truly participatory practices because their strategies are the product of linear processes for evaluating the change context. In this study, I apply Lennie and Tacchi's (2014) approach to evaluating communication for development in a case study of Pride Campaigns implemented by managers throughout Indonesia who partnered with the conservation non-governmental organization …
Differences In Stress Biomarkers In Women With High And Low Stress Appraisal, Clarissa Sara Gomez
Differences In Stress Biomarkers In Women With High And Low Stress Appraisal, Clarissa Sara Gomez
Open Access Theses & Dissertations
Measures of physiological biomarkers have been widely used in the field of stress research to explain how stress negatively impacts health outcomes. Women in particular have been shown to be more at risk for developing physiological and psychological stress-induced conditions (e.g., hypertension, depression) due to hormonal differences (Kirschbaum et al., 1992), but more importantly, because of their appraisal of stressful events (Schamus et al., 2008). Few studies however have examined whether womenâ??s stress appraisal is predictive of stress reactivity, as measured by stress biomarkers, during stressful events. The goal of this study was to examine whether stress appraisal predicted stress …
Influences Of Ecological Light Pollution On Advertisement Calls Of Spea Multiplicata (Amphibia: Anura: Scaphiopodidae) In Rural And Urban Populations In The Northern Chihuahuan Desert And An Evaluation Of Hybrid S. Bombifrons X S. Multiplicata Calls, Katie Anderson
Open Access Theses & Dissertations
Spea is a genus of toad-like, arid adapted frogs distributed throughout much of the western U.S. and northern Mexico. Two species, (S. Bombifrons and S. Multiplicata) are syntopic throughout most of the northern Chihuahuan Desert, a region that is experiencing rapid urbanization. For this study, I examined 936 male advertisement calls from urban and rural populations of S. multiplicata, and a rural population of S. bombifrons in west Texas and south-central New Mexico. Advertisement calls from urban and rural S. multiplicata were compared against light level to assess the potential influence ecological light pollution plays in sexual …
The Effects Of Extended Access To Methamphetamine Self-Administration On Dopaminergic Markers In The Striatum, Joe Luevano
The Effects Of Extended Access To Methamphetamine Self-Administration On Dopaminergic Markers In The Striatum, Joe Luevano
Open Access Theses & Dissertations
Methamphetamine (METH) abuse is a persistent problem in the U.S. and abroad. Escalation of METH use among independent users occurs for a variety of physiological and psychological reasons. Methamphetamine dependence may be attributed to the rewarding effect of this drug via the dopaminergic systems of the central nervous system (CNS). The presence of METH in the CNS increases synaptic release of dopamine. This increase in dopaminergic neurotransmission is thought to be directly attributed to the rewarding effects of METH. Following METH use, compensatory changes have been found to occur in the dopaminergic system during various periods of abstinence. It is …
The Influence Of Schwartz's Values On Teachers' Internet Usage: A Quantitative Study Of Cross Cultural Differences Between European Nations, Meghana Aleti
Open Access Theses & Dissertations
This study investigated the Impact of human values on teacher Internet usage at individual levels across various nations. Schwartz's higher order values: Openness to Change, Conservation, Self-Enhancement, and Self-Transcendence are used as value variables. Teachers' are categorized as primary education, secondary education or college level. College teachers showed heavy Internet use when compared to secondary and primary teachers. Conservation higher order value was most significant among college teachers. Openness to Change and Self-Enhancement values are positively correlated with heavy Internet use among various nations. This study should be of interest to education and policy makers interested in comparison of Internet …
The Role Of Dopamine In Operant Learning And Memory, Jennifer Leigh Johnson
The Role Of Dopamine In Operant Learning And Memory, Jennifer Leigh Johnson
Open Access Theses & Dissertations
Dopamine is a neurotransmitter that regulates many physiological processes including reward, motivation, movement, learning and memory, and reinforcement. The cognitive processes in which one associates a specific action or behavior with a positive or negative consequence is referred to as operant learning, and is a robust occurrence in everyday life. It is also believed to play a significant role in the development of drug addiction and has been shown that increased levels of dopamine are associated with the intake of addictive drugs such as cocaine and alcohol; however, the underlying cellular mechanisms of this learned behavior are not well understood. …
Safe Medication Use Among Hispanic College Students: Knowledge, Attitudes And Behaviors, Tania Guadalupe Quiroz
Safe Medication Use Among Hispanic College Students: Knowledge, Attitudes And Behaviors, Tania Guadalupe Quiroz
Open Access Theses & Dissertations
College students are at increased risk of medication errors. Research suggests that young adults are active users of over-the- counter (OTC) medications and other products that may increase the risk for negative health outcomes. Therefore, it is very important to analyze young adults' attitudes, beliefs, and behaviors about medication use among college students in order to provide them with the necessary information. Due to language and cultural factors, the issue is particularly relevant in U.S.-Mexico border communities. This casual-comparative study examined knowledge, attitudes, and behaviors regarding medication use among Hispanic college students. Data was collected through a survey developed by …
Preliminary Archaeological Investigations At The Sierra Diablo Cave Site: Paleoindian And Archaic Occupations In Hudspeth County, Texas, Jose Javier Vasquez
Preliminary Archaeological Investigations At The Sierra Diablo Cave Site: Paleoindian And Archaic Occupations In Hudspeth County, Texas, Jose Javier Vasquez
Open Access Theses & Dissertations
It is generally rare to find archaeological sites in the Southwest that retain the type of contextual integrity that the Sierra Diablo Cave exhibits. Often times, cave sites such as the one currently studied offer excellent preservation of cultural materials due to the general lack of moisture and isolation from wind and water erosion. The research aimed to determine when the site was occupied as well as the types of activities that were occurring during those occupations. It exhibits an extensive stratigraphic sequence that contains a well pronounced Late Archaic Period assemblage (Strata A and B) and a Late Pleistocene/Early …
Does Type Of Stimulus Influence Task-Irrelevant Evaluative Categorization Processes?, Guadalupe Corral
Does Type Of Stimulus Influence Task-Irrelevant Evaluative Categorization Processes?, Guadalupe Corral
Open Access Theses & Dissertations
The effect of stimulus type on task-irrelevant evaluative categorization was examined in two separate studies by using the P3 component from event-related brain potentials. The first study presented idiosyncratic stimuli consisting of individuals that were rated by participants as either positive or negative within sequences of pictorial and verbal stimuli. The second study presented sequences of novel and familiar stimuli consisting of previously normed unattractive and neutral individuals. It was hypothesized that pictures would elicit task-irrelevant evaluative categorization processes and so would novel stimuli (relative to words and familiar stimuli, respectively). Task-irrelevance was examined by assessing P3 peak amplitude to …
Characterization Of The Behavioral And Neurochemical Effects Of Nicotine Withdrawal In Adolescent And Adult Rats., Luis Alberto Natividad
Characterization Of The Behavioral And Neurochemical Effects Of Nicotine Withdrawal In Adolescent And Adult Rats., Luis Alberto Natividad
Open Access Theses & Dissertations
Previous studies have demonstrated that the behavioral effects of nicotine withdrawal are lower in adolescent versus adult rats. However, the neurochemical mechanisms that mediate these developmental differences are presently unclear. Much work has shown that nicotine reward is mediated via enhanced dopamine neurotransmission in the mesolimbic pathway which originates in the ventral tegmental area (VTA) and terminates in several forebrain structures including the nucleus accumbens (NAcc). More recently, studies have shown that nicotine withdrawal produces a decrease in NAcc dopamine transmission, an effect that is believed to serve as a neurochemical marker of withdrawal in adult rodents. The goal of …
Impact Of Serotonin 2c Receptor Null Mutation On Physiology And Behavior Associated With Nigrostriatal Dopamine Pathway Function., Laura O'Dell
Laura Elena O'Dell
No abstract provided.
Alcohol Self-Administration Acutely Stimulates The Hypothalamic-Pituitary-Adrenal (Hpa) Axis, But Alcohol Dependence Leads To A Dampened Neuroendocrine State, Laura O'Dell
Laura Elena O'Dell
No abstract provided.
Female Rats Display Dose-Dependent Differences To The Rewarding And Aversive Effects Of Nicotine In An Age-, Hormone-, And Sex-Dependent Manner., Laura O'Dell
Laura Elena O'Dell
No abstract provided.
Rodent Models Of Nicotine Reward: What Do They Tell Us About Tobacco Abuse In Humans?, Laura O'Dell
Rodent Models Of Nicotine Reward: What Do They Tell Us About Tobacco Abuse In Humans?, Laura O'Dell
Laura Elena O'Dell
No abstract provided.
Nicotine Withdrawal Produces Fewer Decreases In Extracellular Levels Of Dopamine In The Nucleus Accumbens Of Adolescent Versus Adult Rats., Laura O'Dell
Laura Elena O'Dell
No abstract provided.
A Psychobiological Framework Of The Substrates That Mediate Nicotine Use During Adolescence, Laura O'Dell
A Psychobiological Framework Of The Substrates That Mediate Nicotine Use During Adolescence, Laura O'Dell
Laura Elena O'Dell
No abstract provided.
A Study Of Possible Pre-Cognitive Advantages Of Bilingualism, Marisela Gutierrez
A Study Of Possible Pre-Cognitive Advantages Of Bilingualism, Marisela Gutierrez
Open Access Theses & Dissertations
Past research has suggested that second language acquisition has a beneficial effect on the development of inhibitory control processes in children and adults. This has been referred to as the "bilingual advantage" and is most commonly quantified using the Simon task. Whether the bilingual advantage extends to precognitive mechanisms has not yet been examined. The goals of this study were to examine the bilingual advantage in university students; and to examine whether the bilingual advantage extends to the precognitive filtering mechanism of sensorimotor gating. It was predicted that, as compared to monolinguals, bilingual university students would have greater inhibitory control, …
Crf1 Receptor Antagonists Attenuate Escalated Cocaine Self-Administration In Rats, Laura O'Dell
Crf1 Receptor Antagonists Attenuate Escalated Cocaine Self-Administration In Rats, Laura O'Dell
Laura Elena O'Dell
No abstract provided.