Repeated Stress
Mostrando 25-36 de 125 artigos, teses e dissertações.
-
25. Effects of simultaneous exposure to stress and nicotine on nicotine-induced locomotor activation in adolescent and adult rats
Preclinical studies have shown that repeated stress experiences can result in an increase in the locomotor response to the subsequent administration of drugs of abuse, a phenomenon that has been termed behavioral cross-sensitization. Behavioral sensitization reflects neuroadaptive processes associated with drug addiction and drug-induced psychosis. Although
Brazilian Journal of Medical and Biological Research. Publicado em: 2012-01
-
26. INTERAÇÕES ENTRE O ESTRESSE REPETIDO E CLOMIPRAMINA: DIFERENNTES RESPOSTAS EM RATOS MACHOS E FÊMEAS / INTERACTION BETWEEN REPEATED STRESS AND CLOMIPRAMINE: DIFERENCE RESPONSE IN MALE AND FEMALE RATS
O estresse pode ser definido como uma variedade de estímulos fisiológicos e psicológicos que podem ter efeitos diretos ou indiretos sobre a função corporal. Neste contexto o estresse repetido ou situações estressantes podem induzir ansiedade e depressão. Diferentes respostas quanto ao estresse repetido e tratamento antidepressivo são observadas em m
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 14/10/2011
-
27. Efeito da presença de um coespecifico no alojamento de ovelhas em novo ambiente, após estresse agudo causado pelo transporte / Effect of the presence of a conspecific in the housing of sheep in the new environment, following acute stress caused by transportation
Background: Sheep are social and gregarious animals. They feel at ease when free and clustered rather than isolated. In some situations, as in experimental procedures, they need to be separated from the flock and kept without social company. Both instances, separation from the flock and isolation are considered stressful and may impact their well being. As s
Publicado em: 2011
-
28. Comportamento social de cabras em lactação após reagrupamento =Social behaviour in lactating dairy goats after regrouping / Social behaviour in lactating dairy goats after regrouping
Background: Like other farm animals, domestic goats may react adversely to unfamiliar individuals, and aggression can be minimized by avoiding the introduction of new individuals into established groups. In modern dairy herds, regrouping according to age, nutrient requirements, lactation period and milk yield level is a common management practice to enhance
Publicado em: 2011
-
29. Prior exposure to stress delays extinction but does not modify reinstatement of nicotine-induced conditioned place preference
Studies in humans suggest that exposure to stress is related to relapse to tobacco use. The reinstatement of conditioned place preference (CPP) provides a simple, noninvasive and easy approach to investigate the mechanisms for drug relapse. The present study investigated whether repeated exposure to stress could change the extinction and reinstatement of nic
Psychology & Neuroscience. Publicado em: 2010-06
-
30. Effect of repeated restraint stress on memory in different tasks
The present study investigated the effect of repeated stress applied to female rats on memory evaluated by three behavioral tasks: two-way shuttle avoidance, inhibitory avoidance and habituation to an open field. Repeated stress had different effects on rat behavior when different tasks were considered. In the two-way active avoidance test the stressed anima
Publicado em: 2010
-
31. Effect of acute and repeated restraint stress on glucose oxidation to CO2 in hippocampal and cerebral cortex slices
It has been suggested that glucocorticoids released during stress might impair neuronal function by decreasing glucose uptake by hippocampal neurons. Previous work has demonstrated that glucose uptake is reduced in hippocampal and cerebral cortex slices 24 h after exposure to acute stress, while no effect was observed after repeated stress. Here, we report t
Publicado em: 2010
-
32. Effect of repeated stress on novelty-induced antinociception in rats
There is extensive evidence that acute stress induces an analgesic response in rats. On the other hand, repeatedly stressed animals may present the opposite effect, i.e., hyperalgesia. Furthermore, exposure to novelty is known to induce antinociception. The effects of repeated restraint stress on nociception after exposure to novelty, as measured by the tail
Publicado em: 2010
-
33. Interaction between repeated restraint stress and concomitant midazolam administration on sweet food ingestion in rats
Emotional changes can influence feeding behavior. Previous studies have shown that chronically stressed animals present increased ingestion of sweet food, an effect reversed by a single dose of diazepam administered before testing the animals. The aim of the present study was to evaluate the response of animals chronically treated with midazolam and/or submi
Publicado em: 2010
-
34. Lipid peroxidation and total radical-trapping potential of the lungs of rats submitted to chronic and sub-chronic stress
Exposure to stress induces a cluster of physiological and behavioral changes in an effort to maintain the homeostasis of the organism. Long-term exposure to stress, however, has detrimental effects on several cell functions such as the impairment of antioxidant defenses leading to oxidative damage. Oxidative stress is a central feature of many diseases. The
Publicado em: 2010
-
35. Efeito da solução hipertônica (NaCI 7,5%) no estresse oxidativo e nos processos de morte celular e remodelamento tecidual hepático em pancreatite aguda experimental / Effect of hypertonic saline solution (NaCl 7.5%) on oxidative stress, apoptosis and hepatic tissue remodeling during acute pancreatitis
It has been shown an hepatic injury following pancreatitis and a positive correlation with severity of the disease. Hypertonic Solution (HS) reduced morbidity and mortality in experimental pancreatitis. We hypothesize that hypertonic solution resuscitation of acute pancreatitis (AP) may exert antiinflammatory effects by modulating hepatic oxidative stress, a
Publicado em: 2010
-
36. O estresse físico modula a mecânica de tecido pulmonar periférico, a expressão de citocinas e o estresse oxidativo em cobaias com inflamação alérgica crônica / Physical stress modulates lung tissue mechanics, cytokines and oxidative stress activation in guinea pigs with chronic allergic inflammation
There are evidences showing that stress can worsen asthma symptoms, but the exact mechanisms that link them are not clarified, especially in the distal lung parenchyma. Recently, the importance of the lung parenchyma has been emphasized in the modulations of the functional alterations, inflammatory and remodeling that characterizes asthma. These alterations
Publicado em: 2009