Biomag 96 pp 781-784 | Cite as

Spatial and Temporal Properties of the Slow Components of the Contingent Magnetic Variation in a Warned Choice Reaction Time Task

  • L. Hultin
  • P. Högstedt
  • V. Pizzella
  • G. L. Romani
  • P. Rossini
  • F. Tecchio
Conference paper

Abstract

Electrically recorded contingent negative variation, eCNV, has been reported as a two-component wave [1]. The early component, the O-wave (orientation-wave), is related to the processing of the warning stimulus (S1) and is sensitive to information that S1 provides with respect to the imperative stimuli (S2). The late component, the E-wave (expectation-wave), is considered to be a manifestation of at least two major processes: motor preparation and stimulus anticipation. The electrical O-wave has a frontocentral distribution, with right hemisphere preponderance, while the E-wave is located precentrally, with a preponderance contralateral to the side of the movement. The CNV is a cognitive process where the neurological responses are constantly changing during an experimental session, due to alterations in the state of alertness of the subject, the process of learning and the reorganization of mental strategy to perform the task. During an initial learning period the amplitudes of the eCNV are decreasing and the potential distribution changes. Recordings of Contingent Magnetic Variation (CMV), the neuromagnetic counterpart of the eCNV, have been reported by several authors [e.g. 2, 3]. The scope of this study was to analyze the presence, distribution, and origin of slow components of CMV in a warned choice reaction time task after the initial learning period has been performed.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. [1]
    Rohrbaugh, J.W., Syndulko, K., and Lindsley, D.B. Brain wave components of the contingent negative variation in humans, Science, 1976, 191: 1055–1057.ADSCrossRefGoogle Scholar
  2. [2]
    Hultin, L., Rossini, P., Romani, G.L., Högstedt, P., Stanzione, P., Tecchio, F., and Pizzella, V. A method for investigation of magnetic fields related to CNV in normal subjects and Parkinson patients, In: Deecke, L., Baumgartner, C., Stroink, G., Williamson, S.J. Biomagnetism: Fundamental research and clinical applications, Elsevier, Amsterdam. 1995.Google Scholar
  3. [3]
    Hultin, L., P. Rossini, G. L. Romani, P. Högstedt, F. Tecchio and V. Pizzella. Neuromagnetic localization of the late component of the contingent negative variation, Electroencephalogr Clin Neurophysiol, Accepted for publication, 1996.Google Scholar
  4. [4]
    Torrioli, G., Casciardi, S., Del Gratta, C., Foglietti, V., Gallagher, W.J., Ketchen, M.B., Kleinsasser, A.W., Pasquarelli, A., Pizzella, V., Romani, G.L., Sandstrom, R.L. (1992) Twenty-eighi-channel hybrid neuromagnetometer. In: Hoke, M., Erné, S.N., Okada, Y.C., Romani, G.L (Eds.), Biomagnetism: Clinical Aspects. Elsevier, Amsterdam.Google Scholar
  5. [5]
    Walter, G., Cooper, R., Aldrige, V. J., and McCallum, W. Contingent negative variation: an electric sign of sensorimotor association and expectancy in the human brain, Nature, 1964, 203: 380–384.ADSCrossRefGoogle Scholar
  6. [6]
    Tecce, J.J. Contingent Negative variation and individual differences: a new approach in brain research, Arch Gen Psychiatry, 1971, 24: 1–16.CrossRefGoogle Scholar
  7. [7]
    Peters, J.F., Billinger, T.W., Knott, J.R. Event related potentials of brain (CNV and P300) in a paired associate learning paradigm, Psychophysiology, 1977, 14: 579–585.CrossRefGoogle Scholar
  8. [8]
    Cooper, R., Osselton, and J.W., Shaw, J.C. EEG Technology, London, Butterworth & Co., 1980.Google Scholar

Copyright information

© Springer Science+Business Media New York 2000

Authors and Affiliations

  • L. Hultin
    • 1
  • P. Högstedt
    • 1
  • V. Pizzella
    • 2
  • G. L. Romani
    • 3
  • P. Rossini
    • 4
    • 5
  • F. Tecchio
    • 2
  1. 1.Department of Applied ElectronicsChalmers University of TechnologyGothenburgSweden
  2. 2.Istituto di Elettronica Stato Solido — C.N.R.RomaItaly
  3. 3.Istituto di Fisica MedicaUniversitá G.D’AnnunzioChietiItaly
  4. 4.Dipartimento di NeurologiaOspedale ”Fatabenefratelli”, Isola, TiberinaRomaItaly
  5. 5.I.R.C.C.S. “S. Lucia,” Via ArdeatinaRomaItaly

Personalised recommendations