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Neurophysiology

, Volume 40, Issue 5–6, pp 369–376 | Cite as

Modifications of EEG in Humans Performing Cyclic Movements by the Fingers of the Right Arm: Effect of Local Contralateral Cooling

  • V. V. Garkavenko
  • E. P. Man’kovskaya
  • T. G. Omel’chenko
  • A. V. Gorkovenko
  • A. N. Shevko
Article

In a group of 11 volunteers, we examined changes in EEG during voluntary cyclic movements of the fingers of the right arm providing the movement of a flexible ring-like cord. The performance of full rotation of the ring for the first and the second time was considered the first and the second phase of the test, Ph1 and Ph2, respectively. This motor test was realized under different conditions, namely in the absence of additional somatic stimulation (condition 1) and in the course of intense, but non-painful, local cooling of the fingers of the left arm (condition 2). Independently of the conditions of the motor test, the spectral power (SP) of the 2–4-Hz rhythm increased (especially within Ph2), while SPs of the theta2, alpha1, and alpha2 rhythms in the course of Ph1 decreased. Within Ph2 under condition 1, the SP of theta1 oscillations intensified. A drop in the SP of alpha oscillations in the course of Ph1 with respect to the background state was observed only under condition 1 and was clearer in the alpha2 rhythm. Under condition 2, as compared with condition 1, the SP of the theta1 rhythm and values of the theta1/alpha1 and theta1/alpha2 SP ratios decreased within both phases of the test. These shifts probably reflected mobilization of the attention resources in the course of realization of the movements under conditions of additional sensory stimulation. During cooling (condition 2), the indices of interindividual variability of changes in the SPs within the Ph2 of the motor test increased for the alpha rhythms and decreased for delta oscillations, as compared with the respective values within the first phase. These data demonstrate that local cooling of a sub-painful intensity significantly modulates the EEG pattern during realization of local rhythmic movements.

Keywords

EEG frequency EEG components (rhythms) voluntary movements rhythmic movements cold stimulation 

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Copyright information

© Springer Science+Business Media, Inc. 2008

Authors and Affiliations

  • V. V. Garkavenko
    • 1
  • E. P. Man’kovskaya
    • 1
  • T. G. Omel’chenko
    • 1
  • A. V. Gorkovenko
    • 1
  • A. N. Shevko
    • 1
  1. 1.Bogomolets Institute of PhysiologyNational Academy of Sciences of UkraineKyivUkraine

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