Janaína da silva rocha-lopes, ricardo borges machado and deborah suchecki, chronic rem sleep restriction in juvenile male rats induces anxiety-like behavior and alters monoamine systems in the amygdala and hippocampus, molecular neurobiology, (2017. The amygdala is also strongly implicated in social behaviors, especially play behavior and playing fight (eg, pinning), which are the earliest forms of nonmother-directed social behaviors and associated with prepubertal rats. Studies in female rats using the amygdala-kindling model have demonstrated that seizures may affect secretion of reproductive hormones the medial and ventral basolateral amygdala modulate and have a suppressive effect, respectively, on gonadotropin secretion. The first test's results showed that the adolescent hamsters treated with aas had higher reproductive behavior and an increased number of mounts, intromissions, and ejaculations in comparison to the vehicle-treated adolescent hamsters, whereas the adult hamsters treated with aas showed a significant decrease in reproductive behavior along.
Stress is how the brain and body respond to any demand every type of demand or stressor—such as exercise, work, school, major life changes, or traumatic events—can be stressful. Polymorphisms in the maternal sex steroid pathway are associated with behavior problems in male offspring disruption of endocrine pathways at critical stages in development may differentially affect non-reproductive behaviors in male and female offspring. Wistar rats were adapted to normal feeding 6 h/day, with continuous computer monitoring of feeding patterns one of five solutions (10 ml of 1 kcal/ml at 045 ml/min 0, 20, 50, 80, or 100% of energy from fat) or saline (control) was infused 10 min after initiation of eating.
Moreover, oxytocin, but not vasopressin, administration into the central amygdala reversed the social incompetence of the prenatally stressed rats without increasing behavior in non-stressed control animals. Endocrine and reproductive alterations are frequently reported to occur in women with temporal lobe epilepsy as well as in female rats in different experimental models of limbic seizures as previously reported, women with epilepsy have lower fertility rates than women without epilepsy (tanganelli, p, regesta, g, 1992. The controls of food intake differ in male and female rats daily food intake is typically greater in male rats, relative to female rats, and a decrease in food intake, coincident with the estrous stage of the ovarian reproductive cycle, is well documented in female rats. Pregnant rats were ip injected with a solution of 17α-ethinylestradiol (15 μg kg −1) every day between day 9 and day 14 of pregnancy and the behavior of the offspring was compared to that of rats born from dams injected with the vehicle only during the same gestational period. The authors review our understanding of the biological basis of resilience to stress the review examines findings from both humans and animals and also discusses how this knowledge can help guide.
Alterations to continue to change the brain and resultant behavior of the mother rat recently, behaviors not traditionally associated with maternal behavior, specifically learning and memory, have been found to be enriched following reproductive experience. The corticosterone eia kit is a colorimetric competitive enzyme immunoassay kit with results in 3 hours absorbance is read at 405 nm the corticosterone eia kit has low cross-reactivity with related steroids. Abstract the introduction of the fetal programming hypothesis, first in epidemiology, subsequently in a broad range of disciplines concerned with developmental biology, has generated new interest in phenotypic plasticity, the mechanisms that govern it, and its place in evolutionary biology.
They fight over territories females inadvertently choose males with genes to win b/c they are looking for best territories to raise young only about 1/3 of male elephant seals win and get to procreate. In 1999, edwards et al reported that kindling of the basolateral amygdala in female rats suppresses estrous cyclicity, leaving animals in a state of persistent estrus that is accompanied by elevated levels of the sex steroid hormone estradiol. Postweaning isolation protocols in female rats result in increased adult anxiety, as measured by deficits in si behavior, of exploration, and novelty-suppressed feeding , and increased vigilance and arousal upon injection of an anxiogenic pharmacological compound.
Estrogen administered to aged rats also restored endocrine alterations associated with natural reproduction (eg, hippocampal nmda nr2b receptor levels to those of young rats pregnancy and lactation) on brain structure and behavior, however, (adams et al, 2004. Phthalate exposure has recently been associated with behavioral actions that are linked to its endocrine-disrupting properties the purpose of this study was to investigate the molecular, anatomical, and behavioral effects of indirect perinatal benzyl butyl phthalate (bbp) exposure in offspring of bbp-treated pregnant dams. In the central amygdala, crf mrna levels were increased in both groups of subordinates compared with con rats, whereas responsive subordinates exhibited higher levels than the dom rats as well avp mrna levels did not vary with behavioral rank in any subdivision of the paraventricular hypothalamic nucleus.