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	Provedor de dados 56 (3) Autor Romero,S.M.B. (3) Hoffmann,A. (2) Rizzatti,A.C.S. (1) Palavra-chave Heart rate (3) Snail (3) Cardiac nerve (2) Megalobulimus mogianensis (2) Aversive stimulus (1) Dehydration (1) Dormancy (1) Innocuous stimulus (1) Megalobulimus sanctipauli (1) Starvation (1) Mais... Tipo do documento Info:eu-repo/semantics/other (2) Info:eu-repo/semantics/article (1) Ano 2008 (1) 2006 (1) 2001 (1) País Brazil (3) Idioma Inglês (3)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 3 Primeira ... 1 ... Última Heart rate and body weight alterations in juvenile specimens of the tropical land snail Megalobulimus sanctipauli during dormancy 56 Rizzatti,A.C.S.; Romero,S.M.B.. The time course of heart rate and body weight alterations during the natural period of dormancy were determined in active feeding and dormant juvenile specimens of Megalobulimus sanctipauli. In both groups, heart rate markedly decreased during the first 40 days of dormancy, tending to stabilize thereafter. This time period coincided with the decrease in environmental temperature during autumn-winter. At the end of the dormancy period, surviving active feeding and dormant snails showed a significant decrease in heart rate which, however, was significantly greater in the latter group. Total body weight decreased concomitantly with heart rate in dormant snails but remained constant in active feeding snails. Body hydration induced significant increases in... Tipo: Info:eu-repo/semantics/article Palavras-chave: Dehydration; Dormancy; Heart rate; Snail; Starvation; Megalobulimus sanctipauli. Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2001000700015 Role of the cardiac nerve in the adaptive changes of heart rate in response to an aversive stimulus in Megalobulimus mogianensis 56 Romero,S.M.B.; Hoffmann,A.. The effect of an aversive stimulus represented by contact with a hot plate on the heart rate of Megalobulimus mogianensis was evaluated with electrocardiogram recording in intact snails (N = 8). All stimulated animals showed an increase in heart rate, with mean values ranging from 35.6 ± 1.2 (basal heart rate) to 43.8 ± 0.9 bpm (post-stimulation heart rate). The cardioacceleration was followed by gradual recovery of the basal heart rate, with mean recovery times varying from 4.3 ± 0.3 to 5.8 ± 0.6 min. Repetition of the stimulus did not affect the magnitude of variation nor did it influence the basal heart rate recovery time. To investigate the role of the cardiac nerve in mediating the heart rate alterations induced by the aversive stimulus, denervated (N... Tipo: Info:eu-repo/semantics/other Palavras-chave: Aversive stimulus; Cardiac nerve; Heart rate; Snail; Megalobulimus mogianensis. Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2008000500013 Role of the cardiac nerve in the effect of a novel innocuous stimulus on the heart rate of Megalobulimus mogianensis 56 Romero,S.M.B.; Hoffmann,A.. The effects of a brief jet of water delivered to the anterior portion of body-head on the heart rate of Megalobulimus mogianensis were determined in a group of intact snails (N = 8), previously prepared for electrocardiogram recording. The heart rate was significantly increased following stimulation. Nevertheless, with repetition of the stimulus there was a significant decrease in the magnitude of the heart rate variation and in the time for the basal heart rate to recover (first stimulus, 7.4 ± 1.2 bpm and 15.5 ± 1.8 min; second stimulus, 4.8 ± 1.0 bpm and 10.6 ± 1.5 min; third stimulus, 5.0 ± 0.3 bpm and 11.1 ± 1.8 min), indicating that this behavioral response undergoes early habituation. To determine the role of the cardiac nerve in mediating the heart... Tipo: Info:eu-repo/semantics/other Palavras-chave: Innocuous stimulus; Cardiac nerve; Heart rate; Snail; Megalobulimus mogianensis. Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2006000600018 Registros recuperados: 3 Primeira ... 1 ... Última

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