Navegando por Autor "CARVALHO NETO, Marcus Bentes de"

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O jato de ar quente como estímulo punidor em rattus norvegicus
(2005-12) CARVALHO NETO, Marcus Bentes de; MAESTRI, Thrissy Collares; TOBIAS, Gracy Kelly da Silva; RIBEIRO, Thalita Coutinho; COUTINHO, Eduarda Cristina Notargiacomo Novaes; MICCIONE, Mariana Morais; OLIVEIRA, Rita de Cássia Valente; FERREIRA, Fabiane Soraia da Silva; FARIAS, Danielle Chaves de; MOREIRA, Daniele
In experimental research on aversive control, electric shock has been predominantly used as a punisher stimulus. The present work describes the use of an apparatus that produces a hot air blast which can be an alternative stimulus to be used in research on aversive contingencies. The punishing function of the hot air blast was evaluated in both continuous (CRF) and intermittent (FR3) schedules and, in both cases, a partial suppression (98,4% and 71,15%, respectively) of the lever press responding was found, after a history of the continuous reinforcement. Suppression was bigger when the punishing stimulus was applied continuously and these data corroborate the data obtained with electric shock, described in the literature. Both the apparatus and the stimulus seemed to be appropriate from a technical and scientific perspective and the apparatus may become an attractive alternative from a financial standpoint.
Acesso aberto (Open Access)
A Psicologia como campo de conhecimento e como profissão de ajuda
(2004-04) TOURINHO, Emmanuel Zagury; CARVALHO NETO, Marcus Bentes de; SILVA, Simone Maria Neno
The present article focuses an interpretation of psychology according to which philosophical/reflexive, empirical, and applied contents account for an original configuration of the discipline. The paper considers some historical facts that ground such configuration, which should be considered in order to achieve a better understanding of the heterogeneity of objects, methods, goals and philosophical commitments of the diverse psychological approaches. Some implications of the model to an appreciation of (academic and non academic) doings in contemporary psychology are then discussed. It is argued that the success of each psychological approach depends, to a certain extent, on its recognition of the multifold character of the psychological field and its capacity to give consistent and integrated responses to the different social demands that give rise to the field.
Acesso aberto (Open Access)
Subchronic effects of fluoxetine on conditioned suppression produced by a hot air blast
(2012-06) NASCIMENTO, Gabriela Souza do; MONTEIRO, Patrícia Caroline Madeira; GOUVEIA JUNIOR, Amauri; CARVALHO NETO, Marcus Bentes de
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 studied drugs. Additionally, few studies have sought to investigate the effects of selective serotonin reuptake inhibitors (SSRIs). The present study investigated the effect of subchronic 5-day administration of 5 mg/kg fluoxetine in the retention of conditioned suppression produced by a hot air blast (HAB). The subjects were 12 albino Wistar rats distributed into an Experimental Group (EG) and Control Group (CG). After sessions were conducted to pair two stimuli, a sound and HAB, fluoxetine (EG) or saline (CG) was administered. Twentyfour hours after the last injection, a test session was conducted. The results showed no difference between groups. Fluoxetine (5 mg/kg) did not exert anxiolytic effects in this model of conditioned suppression produced by a HAB. Keywords: conditioned suppression; fluoxetine; subchronic; hot air blast.