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Modulations in Low-Frequency EEG Oscillations in the Processing of Tactile Surfaces

  • Francisco Muñoz
  • Manuel Sebastián
  • José Manuel Reales
  • Soledad Ballesteros
Part of the Lecture Notes in Computer Science book series (LNCS, volume 6192)

Abstract

The present study investigated low-oscillatory (theta band, 3-7 Hz) modulations induced by tactile roughness stimulations under two attention-demanding conditions. Four levels of roughness were presented under low-demanding and high-demanding conditions. In both conditions, an oddball paradigm was used to present three target surfaces varying in roughness (low, mid, and high levels of roughness), and a nontarget flat surface. The results showed that centro-parietal theta oscillations are involved in allocating attentional resources when participants have to update new information induced by incoming haptic stimuli. Theta power was higher in the high-demanding task compared to the low-demanding. Furthermore, theta power varied depending on tactile roughness but not in a linear manner. This was interpreted as that theta oscillations were sensitive not only to task difficulty but also to physical properties.

Keywords

tactile roughness perception brain oscillations attentional demands theta band 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2010

Authors and Affiliations

  • Francisco Muñoz
    • 1
  • Manuel Sebastián
    • 1
  • José Manuel Reales
    • 1
  • Soledad Ballesteros
    • 1
  1. 1.UNED, Department of Basic Psychology IIMadridSpain

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