Cognitive Processing

, Volume 13, Supplement 1, pp 97–101 | Cite as

Exploring the role of primary and supplementary motor areas in simple motor tasks with fNIRS

  • Sabrina Brigadoi
  • Simone Cutini
  • Fabio Scarpa
  • Pietro Scatturin
  • Roberto Dell’Acqua
Short Report

Abstract

Studies employing functional magnetic resonance imaging (fMRI) have highlighted a covariation between the amplitude of hemodynamic responses recorded in primary and supplementary motor areas (M1 and SMA) and the duration of a motor task. A subset of these studies have hinted to a possible functional dissociation between processing carried out in these areas, with SMA primarily involved in action preparation, while M1 involved in action execution. This proposed functional dissociation was explored in the present study using a different technique—functional near-infrared spectroscopy—which enabled a finer-grained monitoring of the temporal characteristics of the hemodynamic response compared to fMRI. Here, hemodynamic responses in M1 and SMA were recorded in 7 participants during a right-finger-tapping task of short (1 s) or long (3 s) duration. Hemodynamic responses of larger amplitude were recorded from both contralateral M1 and SMA during long-duration than short-duration tapping. Furthermore, the analysis of the temporal profiles of these responses revealed a more sustained and prolonged activity for long-duration versus short-duration tapping in M1, but not in SMA. Rather than functionally dissociable areas, the present results are more compatible with the hypothesis that M1 and SMA subserve different, though strongly interacting, functional subroutines subtended in motor task preparation and execution.

Keywords

Near-infrared spectroscopy fNIRS Motor task M1 SMA 

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Copyright information

© Marta Olivetti Belardinelli and Springer-Verlag 2012

Authors and Affiliations

  • Sabrina Brigadoi
    • 1
  • Simone Cutini
    • 2
  • Fabio Scarpa
    • 1
  • Pietro Scatturin
    • 1
  • Roberto Dell’Acqua
    • 1
    • 3
  1. 1.Department of Developmental PsychologyUniversity of PadovaPadovaItaly
  2. 2.Department of General PsychologyUniversity of PadovaPadovaItaly
  3. 3.Center for Cognitive and Brain ScienceUniversity of PadovaPadovaItaly

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