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Social and Behavioral Sciences Commons™
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Full-Text Articles in Social and Behavioral Sciences
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 …
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 …
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 …