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Doctoral Thesis
DOI
https://doi.org/10.11606/T.42.2011.tde-22072011-083628
Document
Author
Full name
André Mascioli Cravo
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2011
Supervisor
Committee
Baldo, Marcus Vinicius Chrysostomo (President)
Helene, André Frazão
Machado, Birajara Soares
Morya, Edgard
Valle, Luiz Eduardo Ribeiro do
Title in Portuguese
Bases cognitivas da expectativa temporal.
Keywords in Portuguese
Eletrofisiologia
Fisiologia sensorial
Neurofisiologia
Abstract in Portuguese
A habilidade de se preparar para futuros eventos é essencial para o comportamento. No presente trabalho, investigamos como diferentes formas de expectativa temporal podem modular o processamento de estímulos sensoriais. Por meio de 4 experimentos psicofísicos, sendo 2 com registro eletroencefalográfico (EEG) concomitante, nós estudamos o efeito da ação motora voluntária e da expectativa temporal em diferentes estágios do processamento sensorial. Nossos resultados sugerem que mecanismos ligados à preparação motora influenciam a percepção temporal das consequências desta ação. Além disso, nossos resultados mostraram que a atenção temporal pode modular estágios motores e sensoriais do processamento. Em conjunto, nossos resultados sugerem que expectativas temporais podem influenciar diferentes estágios do processamento principalmente por meio do controle de excitabilidade cortical de regiões do sistema nervoso central ligadas àquela tarefa.
Title in English
The cognitive basis of temporal expectations.
Keywords in English
Electrophysiology
Neurophysiology
Sensory physiology
Abstract in English
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 that mechanisms related to motor preparation can bias the temporal perception of the consequences of this action. Moreover, we found that temporal attention can modulate perceptual and motor stages of stimulus processing. Altogether, our results suggest that temporal expectations can influence different levels of target processing, mainly by controlling cortical excitability of task-relevant regions of the central nervous system.
 
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Publishing Date
2011-08-24
 
WARNING: The material described below relates to works resulting from this thesis or dissertation. The contents of these works are the author's responsibility.
  • CRAVO, AM, et al. Endogenous modulation of low frequency oscillations by temporal expectations. Journal of Neurophysiology [online], 2011, vol. 106, n. 6, p. 2964-2972. [cited 2012-03-01]. Available from : <http://jn.physiology.org/content/early/2011/09/02/jn.00157.2011>
  • CRAVO, AM, et al. Temporal expectation enhances contrast sensitivity by phase entrainment of low-frequency oscillations in visual cortex. The Journal of Neuroscience [online], 2013, vol. 33, n. 9, p. 4002-4010. [cited 2013-02-02]. Available from : <http://www.jneurosci.org/content/33/9/4002.abstract>
  • CRAVO, Andre M., CLAESSENS, Peter M. E., and BALDO, Marcus V. C.. Voluntary action and causality in temporal binding [doi:10.1007/s00221-009-1969-0]. Experimental Brain Research [online], 2009, vol. 199, n. 1, p. 95-99.
  • CRAVO, Andre M., CLAESSENS, Peter M.E., and BALDO, Marcus V.C.. The relation between action, predictability and temporal contiguity in temporal binding [doi:10.1016/j.actpsy.2010.11.005]. Acta Psychologica [online], 2011, vol. 136, n. 1, p. 157-166.
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