Learned Helplessness
Mostrando 1-12 de 14 artigos, teses e dissertações.
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1. Potential antidepressant effect of amantadine: a review of preclinical studies and clinical trials
Objective: Amantadine blocks N-methyl-D-aspartate (NMDA) receptors and has dopaminergic and noradrenergic action, a neurochemical profile that suggests its potential as an antidepressant drug. We conducted a systematic review of preclinical and clinical studies addressing the effects of amantadine in animal models of depression and in patients with depressi
Rev. Bras. Psiquiatr.. Publicado em: 11/06/2018
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2. Animal models as tools to study the pathophysiology of depression
The incidence of depressive illness is high worldwide, and the inadequacy of currently available drug treatments contributes to the significant health burden associated with depression. A basic understanding of the underlying disease processes in depression is lacking; therefore, recreating the disease in animal models is not possible. Popular current models
Rev. Bras. Psiquiatr.. Publicado em: 2013
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3. Desamparo aprendido e imunização em humanos: avaliação metodológica/conceitual e uma proposta experimental / Learned helplessness and immunization in humans: methodological/conceptual evaluation and an experimental proposal
The results of learned helplessness studies with humans have been inconsistent. This is probably due to the systematic contiguity between the end of the aversive stimulus and the immediately preceding response during the uncontrollability session, which mimics an accidental control condition. Three experiments were conducted to establish a procedure with ade
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 03/09/2012
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4. Uso da robótica para exploração e descoberta do ambiente para crianças com deficiência física severa
Severe-physically disabled children have little chance of environmental and social exploration and discovery, and due this lack of interaction and independency, this fact may lead to an idea that they are unable to do anything by themselves. This idea is called learned helplessness and is very negative for the childs cognitive development and social developm
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 25/03/2011
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5. Towards a translational model of panic attack
About 20 years ago, Deakin and Graeff proposed that whereas generalized anxiety disorder is produced by the overactivity of 5-HT excitatory projections from dorsal raphe nucleus to the areas of prefrontal cortex and amygdala which process distal threat, panic attacks are a dysfunction of 5-HT inhibitory projections from dorsal raphe nucleus to the dorsal per
Psychology & Neuroscience. Publicado em: 2010-06
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6. Differential response to gepirone but not to chlordiazepoxide in malnourished rats subjected to learned helplessness
The learned helplessness (LH) paradigm is characterized by learning deficits resulting from inescapable events. The aims of the present study were to determine if protein-calorie malnutrition (PCM) alters learning deficits induced by LH and if the neurochemical changes induced by malnutrition alter the reactivity to treatment with GABA-ergic and serotonergic
Brazilian Journal of Medical and Biological Research. Publicado em: 17/12/2007
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7. Investigação longitudinal dos efeitos de diferentes contingências com estímulos apetitivos e aversivos sobre o desamparo aprendido / Longitudinal research on the effects of different contingencies with appetitive and aversive stimuli upon learned helplessness
The learned helplessness hypothesis was put forward by Seligman &Maier in 1976 under the assumption of generality among all stimulus conditions, aversive or otherwise, and as an explanatory model of human depression. This proposition allowed for some experimental manipulations aimed at reversing the effect, using, among others things, positive reinforcement
Publicado em: 2007
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8. Efeito do hypericum perforatum, em preparação homeopática e fitoterápica, sobre o desamparo aprendido em ratos / Effect of hypericum perforatum, in homeopathic and phytotherapic preparation, upon learned helplessness in rats
Alternative treatments for the human depression have been conducted in the homeopathy and phytoterapy, through Hypericum perforatum (Hp), dynamized or extract, respectively. Experimentally, learned helplessness is proposed as an animal model of depression, which permits its use to test the effects of potential antidepressants. Two experiments were conducted
Publicado em: 2006
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9. A study of response independent environmental changes: learned helplessness, superstitious behavior and the role of verbal report. / Um estudo sobre alterações ambientais independentes da reposta: desamparo aprendido, comportamento supersticioso e o papel do relato verbal
The present study investigated the effects of exposure to aversive events- controllable and incontrollable on the performance of young adults on an escape/avoidance task that followed such exposure. A second goal of the present study was to evaluate the possible effects of requests of verbal reports over the participants performances. Participants were 40 ad
Publicado em: 2006
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10. Response dependent and response independent environmental changes: a study on the effects of contiguity versus contingency / Alterações ambientais dependentes e independentes da resposta: uma investigação dos efeitos de contigüidade versus contingência
The effects of presenting stimuli that are well established as reinforcers independently of responding have been studied under two different perspectives. On the first perspective, through a procedure called accidentally reinforcement, stimuli are presented non-contingently, resulting in the accidental selection of a response, an effect called superstition.
Publicado em: 2006
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11. Alterações ambientais independentes da resposta: um estudo sobre desamparo aprendido, comportamento supersticioso e o papel do relato verbal / Response independent environmental changes: a study on learned helplessness, superstitious behavior, and the role of verbal report
O presente trabalho foi uma tentativa de produzir desamparo aprendido com sujeitos humanos e, também, de proporcionar uma descrição acurada das contingências em vigor para os grupos submetidos tanto à controlabilidade quanto à incontrolabilidade. Para tanto, dois experimentos foram realizados. No primeiro experimento, o objetivo foi: investigar os efei
Publicado em: 2006
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12. Alterações ambientais independentes da resposta: um estudo sobre desamparo aprendido, comportamento supersticioso e o papel do relato verbal / Response independent environmental changes: a study on learned helplessness, superstitious behavior, and the role of verbal report
O presente trabalho foi uma tentativa de produzir desamparo aprendido com sujeitos humanos e, também, de proporcionar uma descrição acurada das contingências em vigor para os grupos submetidos tanto à controlabilidade quanto à incontrolabilidade. Para tanto, dois experimentos foram realizados. No primeiro experimento, o objetivo foi: investigar os efei
Publicado em: 2006