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	Provedor de dados BJMBR (5) Autor Gawryszewski,L.G. (5) Lameira,A.P. (2) Machado-Pinheiro,W. (2) Ribeiro-do-Valle,L.E. (2) Conde,E. (1) Faria Jr.,A.J.P. (1) Guimarães-Silva,S. (1) Klausner-de-Oliveira,L. (1) Pereira Jr,A. (1) Pereira,A. (1) Portugal,T.S. (1) Santos-Silva,J.C. (1) Silva-dos-Santos,C.F. (1) Mais... Palavra-chave Attention (2) Gap effect (2) Handedness recognition (2) Manual reaction time (2) Mirror neurons (2) Motor imagery (2) Affordance (1) Covert orienting (1) Distractor (1) Expectancy (1) Express responses (1) Imitation (1) Inhibition of return (1) Mental rotation (1) Preparation (1) Reaction time (1) Reaction times (1) Saccadic reaction time (1) Vision (1) Visual attention (1) Mais... Tipo do documento Info:eu-repo/semantics/other (4) Info:eu-repo/semantics/article (1) Ano 2015 (1) 2007 (1) 2004 (2) 1998 (1) País Brazil (5) Idioma Inglês (5)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 5 Primeira ... 1 ... Última Experimental context modulates warning signal effects BJMBR Machado-Pinheiro,W.; Faria Jr.,A.J.P.; Gawryszewski,L.G.; Ribeiro-do-Valle,L.E.. Previous studies have shown that saccadic eye responses but not manual responses were sensitive to the kind of warning signal used, with visual onsets producing longer saccadic latencies compared to visual offsets. The aim of the present study was to determine the effects of distinct warning signals on manual latencies and to test the premise that the onset interference, in fact, does not occur for manual responses. A second objective was to determine if the magnitude of the warning effects could be modulated by contextual procedures. Three experimental conditions based on the kind of warning signal used (visual onset, visual offset and auditory warning) were run in two different contexts (blocked and non-blocked). Eighteen participants were asked to... Tipo: Info:eu-repo/semantics/other Palavras-chave: Reaction times; Attention; Distractor; Preparation; Expectancy. Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2004000700016 Gap effect and reaction time distribution: simple vs choice manual responses BJMBR Machado-Pinheiro,W.; Gawryszewski,L.G.; Ribeiro-do-Valle,L.E.. It is well known that saccadic reaction times (SRT) are reduced when the target is preceded by the offset of the fixation point (FP) - the gap effect. Some authors have proposed that the FP offset also allows the saccadic system to generate a separate population of SRT, the express saccades. Nevertheless, there is no agreement as to whether the gap effect and express responses are also present for manual reaction times (MRT). We tested the gap effect and the MRT distribution in two different conditions, i.e., simple and choice MRT. In the choice MRT condition, subjects need to identify the side of the stimulus and to select the appropriate response, while in the simple MRT these stages are not necessary. We report that the gap effect was present in both... Tipo: Info:eu-repo/semantics/other Palavras-chave: Attention; Reaction time; Gap effect; Vision; Express responses. Ano: 1998 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1998001000012 Inhibition of return, gap effect and saccadic reaction time to a visual target BJMBR Guimarães-Silva,S.; Gawryszewski,L.G.; Portugal,T.S.; Klausner-de-Oliveira,L.. Simple manual reaction time (MRT) to a visual target (S2) is shortened when a non-informative cue (S1) is flashed at the S2 location shortly before the onset of S2 (early facilitation). Afterwards, MRT to S2 appearing at the S1 location is lengthened (inhibition of return - IOR). Similar results have been obtained for saccadic reaction time (SRT). Moreover, when there is a temporal gap between offset of the fixation point (FP) and onset of a target (gap paradigm), SRT is shorter than SRT in an overlap paradigm (FP remains on). In the present study, we determined SRT to S2 (10º) after presenting S1 at the same eccentricity (10º) or at a parafoveal position (2º) in the same or in the opposite hemifield. In addition, we employed both gap and overlap... Tipo: Info:eu-repo/semantics/other Palavras-chave: Visual attention; Saccadic reaction time; Inhibition of return; Covert orienting; Gap effect. Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2004000400010 Interaction between affordance and handedness recognition: a chronometric study BJMBR Lameira,A.P.; Pereira,A.; Conde,E.; Gawryszewski,L.G.. The visualization of tools and manipulable objects activates motor-related areas in the cortex, facilitating possible actions toward them. This pattern of activity may underlie the phenomenon of object affordance. Some cortical motor neurons are also covertly activated during the recognition of body parts such as hands. One hypothesis is that different subpopulations of motor neurons in the frontal cortex are activated in each motor program; for example, canonical neurons in the premotor cortex are responsible for the affordance of visual objects, while mirror neurons support motor imagery triggered during handedness recognition. However, the question remains whether these subpopulations work independently. This hypothesis can be tested with a manual... Tipo: Info:eu-repo/semantics/article Palavras-chave: Affordance; Handedness recognition; Manual reaction time; Motor imagery; Mirror neurons. Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2015000400316 Mental rotation of anthropoid hands: a chronometric study BJMBR Gawryszewski,L.G.; Silva-dos-Santos,C.F.; Santos-Silva,J.C.; Lameira,A.P.; Pereira Jr,A.. It has been shown that mental rotation of objects and human body parts is processed differently in the human brain. But what about body parts belonging to other primates? Does our brain process this information like any other object or does it instead maximize the structural similarities with our homologous body parts? We tried to answer this question by measuring the manual reaction time (MRT) of human participants discriminating the handedness of drawings representing the hands of four anthropoid primates (orangutan, chimpanzee, gorilla, and human). Twenty-four right-handed volunteers (13 males and 11 females) were instructed to judge the handedness of a hand drawing in palm view by pressing a left/right key. The orientation of hand drawings varied from... Tipo: Info:eu-repo/semantics/other Palavras-chave: Handedness recognition; Mental rotation; Manual reaction time; Motor imagery; Mirror neurons; Imitation. Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2007000300013 Registros recuperados: 5 Primeira ... 1 ... Última

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