Premotor and occipital theta asymmetries as discriminators of memory- and stimulus-guided tasks

C. Cartier, J. Bittencourt, C. Peressutti, S. Machado, F. Paes, A.T. Sack, L.F. Basile, S. Teixeira, J.I. Salles, A.E. Nardi, M. Cagy, R. Piedade, O. Arias-Carrión, B. Velasques, P. Ribeiro

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4 Citations (Scopus)

Abstract

The saccadic paradigm has been used to investigate specific cortical networks involving visuospatial attention. We examined whether asymmetry in theta and beta band differentiates the role of the hemispheres during the execution of two different prosacadic conditions: a fixed condition, where the stimulus was presented at the same location; and a random condition, where the stimulus was unpredictable. Twelve healthy volunteers (3 male; mean age: 26.25) performed the task while their brain activity pattern was recorded using quantitative electroencephalography. We did not find any significant difference for beta, slow- and fast-alpha frequencies for the pairs of electrodes analyzed. The results for theta band showed a superiority of the left hemisphere in the frontal region when responding to the random condition on the right, which is related to the planning and selection of responses, and also a greater activation of the right hemisphere during the random condition, in the occipital region, related to the identification and recognition of patterns. These results indicate that asymmetries in the premotor area and the occipital cortex differentiate memory- and stimulus-driven tasks. (PsycINFO Database Record (c) 2011 APA, all rights reserved) (journal abstract)
Original languageEnglish
Pages (from-to)103-108
Number of pages6
JournalBrain Research Bulletin
Volume87
Issue number1
DOIs
Publication statusPublished - 4 Jan 2012

Keywords

  • qEEG
  • Saccadic eye movement
  • Lateralization
  • Visuospatial attention
  • Sensorimotor integration
  • POSTERIOR PARIETAL CORTEX
  • VISUOSPATIAL ATTENTION
  • SPATIAL ATTENTION
  • SENSORIMOTOR INTEGRATION
  • WORKING-MEMORY
  • COVERT SHIFTS
  • SACCADES
  • FMRI
  • MOVEMENT
  • MOTOR

Cite this

Cartier, C., Bittencourt, J., Peressutti, C., Machado, S., Paes, F., Sack, A. T., Basile, L. F., Teixeira, S., Salles, J. I., Nardi, A. E., Cagy, M., Piedade, R., Arias-Carrión, O., Velasques, B., & Ribeiro, P. (2012). Premotor and occipital theta asymmetries as discriminators of memory- and stimulus-guided tasks. Brain Research Bulletin, 87(1), 103-108. https://doi.org/10.1016/j.brainresbull.2011.10.013