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	Provedor de dados 56 (4) Autor Baldo,M.V.C. (4) Carreiro,L.R.R. (2) Haddad Jr.,H. (2) Brum,P.C. (1) Mattos,K.C. (1) Middlekauff,H.R. (1) Namba,J. (1) Negrão,C.E. (1) Rolim,N.P.L. (1) Mais... Palavra-chave Attention (3) Psychophysics (2) Vision (2) Cardiac index (1) Coronary ligation (1) Flash-lag effect (1) Heart failure (1) Ischemia (1) Oxygen uptake rate (1) Simple reaction time (1) Spatial probability (1) Temporal order judgment (1) Visual perception (1) Mais... Tipo do documento Info:eu-repo/semantics/other (3) Info:eu-repo/semantics/article (1) Ano 2006 (1) 2003 (1) 2002 (2) País Brazil (4) Idioma Inglês (4)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 4 Primeira ... 1 ... Última The attentional modulation of the flash-lag effect 56 Baldo,M.V.C.; Namba,J.. If a dot is flashed in perfect alignment with a pair of dots rotating around the visual fixation point, most observers perceive the rotating dots as being ahead of the flashing dot (flash-lag effect). This perceptual effect has been interpreted to result from the perceptual extrapolation of the moving dots, the differential visual latencies between flashing and moving stimuli, as well as the modulation of attentional mechanisms. Here we attempted to uncouple the attentional effects brought about by the spatial predictability of the flashing dot from the sensory effects dependent on its visual eccentricity. The stimulus was a pair of dots rotating clockwise around the fixation point. Another dot was flashed at either the upper right or the lower left of the... Tipo: Info:eu-repo/semantics/other Palavras-chave: Attention; Flash-lag effect; Vision; Psychophysics. Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2002000800014 The modulation of simple reaction time by the spatial probability of a visual stimulus 56 Carreiro,L.R.R.; Haddad Jr.,H.; Baldo,M.V.C.. Simple reaction time (SRT) in response to visual stimuli can be influenced by many stimulus features. The speed and accuracy with which observers respond to a visual stimulus may be improved by prior knowledge about the stimulus location, which can be obtained by manipulating the spatial probability of the stimulus. However, when higher spatial probability is achieved by holding constant the stimulus location throughout successive trials, the resulting improvement in performance can also be due to local sensory facilitation caused by the recurrent spatial location of a visual target (position priming). The main objective of the present investigation was to quantitatively evaluate the modulation of SRT by the spatial probability structure of a visual... Tipo: Info:eu-repo/semantics/other Palavras-chave: Simple reaction time; Spatial probability; Vision; Attention. Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2003000700011 The decreased oxygen uptake during progressive exercise in ischemia-induced heart failure is due to reduced cardiac output rate 56 Rolim,N.P.L.; Mattos,K.C.; Brum,P.C.; Baldo,M.V.C.; Middlekauff,H.R.; Negrão,C.E.. We tested the hypothesis that the inability to increase cardiac output during exercise would explain the decreased rate of oxygen uptake (VO2) in recent onset, ischemia-induced heart failure rats. Nine normal control rats and 6 rats with ischemic heart failure were studied. Myocardial infarction was induced by coronary ligation. VO2 was measured during a ramp protocol test on a treadmill using a metabolic mask. Cardiac output was measured with a flow probe placed around the ascending aorta. Left ventricular end-diastolic pressure was higher in ischemic heart failure rats compared with normal control rats (17 ± 0.4 vs 8 ± 0.8 mmHg, P = 0.0001). Resting cardiac index (CI) tended to be lower in ischemic heart failure rats (P = 0.07). Resting heart rate (HR)... Tipo: Info:eu-repo/semantics/article Palavras-chave: Heart failure; Oxygen uptake rate; Cardiac index; Coronary ligation; Ischemia. Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2006000200018 Modulation of the perception of temporal order by attentional and pre-attentional factors 56 Haddad Jr.,H.; Carreiro,L.R.R.; Baldo,M.V.C.. When two stimuli are presented simultaneously to an observer, the perceived temporal order does not always correspond to the actual one. In three experiments we examined how the location and spatial predictability of visual stimuli modulate the perception of temporal order. Thirty-two participants had to report the temporal order of appearance of two visual stimuli. In Experiment 1, both stimuli were presented at the same eccentricity and no perceptual asynchrony between them was found. In Experiment 2, one stimulus was presented close to the fixation point and the other, peripheral, stimulus was presented in separate blocks in two eccentricities (4.8º and 9.6º). We found that the peripheral stimulus was perceived to be delayed in relation to the central... Tipo: Info:eu-repo/semantics/other Palavras-chave: Temporal order judgment; Attention; Visual perception; Psychophysics. Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2002000800016 Registros recuperados: 4 Primeira ... 1 ... Última

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