Conditioned Stimulus
Mostrando 1-12 de 134 artigos, teses e dissertações.
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1. Oxygen consumption and heart rate obtained in a ramp protocol are equivalent during exercise session of rectangular loading at ventilatory thresholds for athletes
Resumo O treinamento no limiar ventilatório (LV) é um estímulo adequado para melhorar os limiares em indivíduos sedentários, entretanto uma maior intensidade é necessária para indivíduos condicionados. A escolha do protocolo de teste de exercício cardiopulmonar (CPx) tem influência na identificação dos LV e pode reduzir sua confiabilidade na pres
Rev. bras. cineantropom. desempenho hum.. Publicado em: 17/10/2019
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2. Subchronic effects of fluoxetine on conditioned suppression produced by a hot air blast
Conditioned suppression is an animal model of anxiety disorders that has been broadly used to investigate the behavioral effects of different drugs. However, various methodological variables (e.g., the type of aversive stimulus) that supposedly interfere with the acquisition of conditioned suppression may also contribute to conflicting results among the stud
Psychol. Neurosci.. Publicado em: 2012-06
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3. Discriminated conditioned suppression in rats
This experiment evaluated the effects of superimposing the Estes-Skinner Conditioned Emotional Response (CER) procedure on one of two components of a multiple schedule. The question was whether CER conditioning occurred under contextual control. The procedure had four experimental phases: (1) baseline of operant responding under a two-component multiple sche
Psychol. Neurosci.. Publicado em: 2012-06
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4. Gabaergic mechanisms of anterior and ventromedial hypothalamic nuclei in the expression of freezing in response to a light-conditioned stimulus
The amygdala, dorsal periaqueductal gray (dPAG), and medial hypothalamus have long been recognized to comprise a neural system responsible for the generation and elaboration of unconditioned fear in the brain. This neural substrate is well known to be under tonic inhibitory control exerted by γ-aminobutyric acid (GABA) mechanisms. Some evidence also suggest
Psychology & Neuroscience. Publicado em: 2011
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5. Learning processes and the neural analysis of conditioning
Classical and operant conditioning principles, such as the behavioral discrepancy-derived assumption that reinforcement always selects antecedent stimulus and response relations, have been studied at the neural level, mainly by observing the strengthening of neuronal responses or synaptic connections. A review of the literature on the neural basis of behavio
Psychology & Neuroscience. Publicado em: 2010-12
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6. Strain and sex differences in fear conditioning: 22 kHz ultrasonic vocalizations and freezing in rats
Strain and sex differences in fear conditioning were investigated in two commonly used laboratory rats: Sprague Dawleys and Long-Evans. Twenty-two kHz ultrasonic vocalization (USV) distress calls and freezing behavior were used to measure fear responses to contextual and auditory conditioned stimuli (CSs), which were previously paired with a footshock uncond
Psychology & Neuroscience. Publicado em: 2009-12
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7. Efeito do pentilenotetrazol e do midazolam na aquisição e na expressão da resposta defensiva de ratos submetidos ao condicionamento olfatório de medo
Pavlovian fear conditioning or first-order fear conditioning has been widely used to study the neuroanatomical, cellular and molecular basis of fear. This paradigm occurs when an emotionally neutral stimulus is presented in conjunction with an aversive unconditioned stimulus (US). After one or several pairings the stimulus, previously neutral, acquires the a
Publicado em: 2009
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8. Behavior analysis of the cue-induced animal model of relapse / Análise comportamental do modelo animal de recaída cue-induced
A recaída ao uso de drogas é um dos principais obstáculos para o tratamento do adicto. Um dos modelos animais mais utilizados para estudar a recaída no laboratório é o chamado de cue-induced. Embora esse modelo tenha se mostrado útil para o estudo de processos neurofisiológicos envolvidos na recaída, seu valor para a análise do controle de estímul
Publicado em: 2009
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9. Neural changes in the spinal cord rights for different types of physical training / Adaptações neurais na medula espinhal de humanos para diferentes tipos de treinamento físico
Introduction: Neural adaptations with physical training have been widely studied. The spinal cord is a possible locus of adaptation. However, longitudinal studies that evaluate directly the spinal cord pathways have not been found in the literature. Therefore, all reports from the literature justify changes found in measured responses to exercise by hypothes
Publicado em: 2009
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10. Oviposition behavior in wild Anastrepha obliqua (Macquart, 1835) (Diptera: Tephritidae): initial study of associative learning related to a protein source
In associative learning, experience enables an animal to associate a conditioned stimulus with some other meaningful stimulus producing either positive or negative effects. In this way, on a subsequent encounter, the response that was previously elicited only by the meaningful stimulus is then elicited by the conditioned stimulus as well. The aim of the pres
Psychology & Neuroscience. Publicado em: 2008-12
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11. Effect of conditioned medium of mesenchymal stem cells on the in vitro maturation and subsequent development of mouse oocyte
Mesenchymal stem cells (MSCs) secrete a variety of cytokines and growth factors in addition to self-renewal and multiple forms of differentiation. Some of these secreted bioactive factors could improve meiotic maturation in vitro and subsequent embryo developmental potential. The aim of the present study was to determine whether in vitro maturation (IVM) of
Brazilian Journal of Medical and Biological Research. Publicado em: 31/10/2008
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12. The time course of ethanol tolerance: associative learning
The effect of different contextual stimuli on different ethanol-induced internal states was investigated during the time course of both the hypothermic effect of the drug and of drug tolerance. Minimitters were surgically implanted in 16 Wistar rats to assess changes in their body temperature under the effect of ethanol. Rat groups were submitted to ethanol
Brazilian Journal of Medical and Biological Research. Publicado em: 22/10/2007