Temporal Stimuli
Mostrando 13-24 de 242 artigos, teses e dissertações.
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13. Responder por exclusão em treinos de discriminação condicional com estímulos temporais por universitários / Choose by exclusion among university students during training of conditional discrimination with temporal stimuli.
O responder por exclusão vem sendo amplamente investigado e documentado com diferentes populações humanas. O padrão de escolher um estímulo indefinido condicionalmente a um modelo também indefinido, quando existem possibilidades de escolha definidas experimentalmente tem chamado a atenção de estudiosos interessados em processos simbólicos como a aqu
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/03/2012
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14. Hippocampal-cerebellar involvement in enhancement of performance in word-based BRT with the presence of background noise: an initial fMRI study
Background noise may impose deleterious effects on cognitive processing. However, noise below the threshold level may increase the ability to detect stimuli via stochastic resonance mechanisms (SR). The present study investigates whether task performance is deteriorated or enhanced by 5-dB SNR and, if the task performance is enhanced, whether this facilitati
Psychol. Neurosci.. Publicado em: 2012-12
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15. Contribuições para a análise de sinais neuronais e biomédicos
Following the new tendency of interdisciplinarity of modern science, a new field called neuroengineering has come to light in the last decades. After 2000, scientific journals and conferences all around the world have been created on this theme. The present work comprises three different subareas related to neuroengineering and electrical engineering: neural
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 03/03/2011
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16. Crianças prematuras: estudo da supressão das emissões otoacústicas e da resolução temporal. / Premature children: study of suppression effect of otoacoustic emissions and temporal resolution
Objective: Determine the occurrence of the suppression of otoacoustic emissions, the temporal resolution hearing skill and the association between the results of these assessments and premature birth as well as the presence of signs suggestive of an alteration in auditory processing during development, in premature, below 2000g at birth. Methods: Forty low-i
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/01/2011
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17. Bases cognitivas da expectativa temporal. / The cognitive basis of temporal expectations.
The ability to anticipate future events is essential for behavior. On the present work, we investigated how different forms of temporal expectations can modulate stimuli processing. In four psychophysical experiments (two of them with EEG) we studied how voluntary action and temporal attention can influence processing at different stages. Our results suggest
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/01/2011
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18. Psychophysical measurements of luminance and chromatic spatial and temporal contrast sensitivity in Duchenne muscular dystrophy
In children with Duchenne muscular dystrophy, color vision losses have been related to dystrophin deletions downstream of exon 30, which affect a dystrophin isoform, Dp260, present in the retina. To further evaluate visual function in DMD children, we measured spatial, temporal, and chromatic red-green and blue-yellow contrast sensitivity in two groups of DM
Psychology & Neuroscience. Publicado em: 2011-06
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19. Lateral interactions in visual perception of temporal signals: cortical and subcortical components
The aim of this work was to isolate and investigate subcortical and cortical lateral interactions involved in flicker perception. We quantified the perceived flicker strength (PFS) in the center of a test stimulus which was simultaneously modulated with a surround stimulus (50% Michelson contrast in both stimuli). Subjects were requested to adjust the modula
Psychology & Neuroscience. Publicado em: 2011-06
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20. Visual contrast sensitivity in tonic-clonic epileptic patients
We measured the effects of epilepsy on visual contrast sensitivity to linear and vertical sine-wave gratings. Sixteen female adults, aged 21 to 50 years, comprised the sample in this study, including eight adults with generalized tonic-clonic seizure-type epilepsy and eight age-matched controls without epilepsy. Contrast threshold was measured using a tempor
Psychology & Neuroscience. Publicado em: 2011-06
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21. Avaliação de parâmetros bioquímicos e comportamentais em peixe-zebra (Danio rerio) : uma abordagem sobre o sistema purinérgico, colinérgico e efeitos promovidos pela taurina no modelo de exposição aguda ao etanol
The zebrafish (Danio rerio) is a small teleost fish that belongs to the Cyprinidae family, which has been studied in different scientific areas. This species has evolutively conserved genes, several neurotransmitter systems characterized, and a wide behavioral repertoire, which may be modulated by distinct drugs. Thus, this thesis aims to study biochemical p
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2011
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22. Contribuição sensorial na facilitação do estímulo precedente. / Facilitation by automatic temporal expectation.
A ocorrência de um estímulo auditivo imediatamente antes de um estímulo alvo visual reduz o tempo de reação em dezenas de milisegundos, um efeito atribuído a atenção temporal automática. O presente estudo investigou se este efeito é resultante de uma facilitação de mecanismos sensoriais. Dois experimentos foram realizados. No primeiro, foi realiz
Publicado em: 2010
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23. Truques sensoriais em diferentes tipos de distonia e no espasmo hemifacial
Introduction: The dystonia is a syndrome of sustained involuntary muscle contractions always producing twisting and repetitive movements or abnormal postures. Of all movement disorders associated with basal ganglia dysfunction, dystonia is the least understood in terms of underlying pathophysiology. Recent works revealed that basal ganglia cortico-striatal-t
Publicado em: 2010
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24. How auditory temporal processing deficits relate to dyslexia
Studies have shown that dyslexic children present a deficiency in the temporal processing of auditory stimuli applied in rapid succession. However, discussion continues concerning the way this deficiency can be influenced by temporal variables of auditory processing tests. Therefore, the purpose of the present study was to analyze by auditory temporal proces
Brazilian Journal of Medical and Biological Research. Publicado em: 2009-07