Summary
We present an overview of the investigations on Synchronized Spontaneous Activity (SSA) in the somatosensory and visual modality. The novelty of the stimulation paradigm and of the off-line data analysis, as well as the capability of the neuromagnetic technique to localize and follow in time the generators responsible for the SSA are used to characterize SSA and to study the underlying spontaneous activity. Synchronization of alpha and mu rhythms have been recognized and studied. The possibilities opened by the technique are discussed.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Barone, P., Narici, L., Romani, G.L., Salustri, C., Pizzella, V. and Modena, I., Novel data analysis for Synchronized Spontaneous Activity. Phys. Med. Biol., 1987, 32: 71–76.
Basar, E., EEG-Brain dynamic, Elsevier/North-Holland Biomedical, Amsterdam, 1980.
Basar, E., Synergetics of neuronal population. A survey on experiments. In E. Basar, H. Flohr, H. Haken and A.J. Mandell (Eds.), Synergetics of the brain. Springer-Verlag, Berlin, 1983: 183–200.
Chapman, R.M., Ilmoniemi, R., Barbanera, S. and Romani, G.L., Selective localization of alpha brain activity with neuromagnetic measurements. Electroenceph. Clin. Neurophysiol., 1984, 58: 569–572.
Kuhlman, W.N., Functional topography of the human 5-rhythm. Electroenceph. Clin. Neurophysiol., 1978, 44: 83–93.
Narici, L., Romani, G.L., Salustri, C., Pizzella, V. Modena, I. and Papanicolau A.C., Neuromagnetic evidence of Synchronized Spontaneous Activity in the brain following repetitive sensory stimulation. Inter. J. Neuroscience, 1987a, 32: 831–836.
Narici, L., Romani, G.L., Salustri, C., Pizzella, V., Torrioli, G., Modena, I., Neuromagnetic characterization of the cortical response to median nerve stimulation in the steady state paradigm. Inter. J. Neuroscience, 1987b, 32: 837–843.
Narici, L., Synchronization of brain activity revealed by neuromagnetic measurements, In: K. Atsumi, M. Kotany, S. Ueno, T. Katila, S.J. Williamson (Eds.), Biomagnetism '87, Tokyo Denki University Press, Tokyo, 1988a: 42–49.
Narici, L., Modena, I., Peresson, M., Pizzella, V., Romnani, G.L., Torrioli, G., Time spatial and frequency analysis of evoked field and synchronized spontaneous activity under repetitive sensory stimulation, In: K. Atsumi, M. Kotany, S. Ueno, T. Katila, S.J. Williamson (Eds.), Biomagnetism '87, Tokyo Denki University Press, Tokyo, 1988b: 134–137.
Narici, L., Romani, G.L., Rossini, P.M., Modena I., Synchronized spontaneous brain activity: spatial and frequency content resolved via neuromagnetic measurements. In Proceedings of the 10th Annual International Conference of the IEEE EMBS, 1988c: 987–988.
Narici, L., Pizzella, V., Romani, G.L., Torrioli, G., Traversa, R. and Rossini, P.M., Evoked alpha and mu rhythm in humans: a neuromagnetic study, 1989a, Brain Research, (in press).
Narici, L., Iori, G., Modena, I., Romani, G.L., Torrioli, G., Traversa R. and Rossini, P.M., Neuromagnetic imaging of synchronized mu activity, In: S.J. Williamson (Ed.), Advances in biomagnetism, Plenum Press, New York, N.Y., 1989b, (in press).
Niedermeyer, E., The normal EEG of the waking adults. In E. Niedermeyer and F.H. Lopes da Silva (Eds.), Electroencephalography, basic priciples, clinical applications and related fields 2nd Edition, Urban & Shwartzenberg, Baltimore-Munich, 1987.
Nunez, P.L., Electric fields of the brain: the neurophysics of EEG, Oxford University Press, New York, 1981. Regan, D., Evoked potentials in phychology, sensory physiology and clinical medicine, Chapman and Hall, London, 1972.
Romani, G.L., Leoni, R., Salustri, C. "Multichannel instrumentation for biomagnetism. In: H.D. Hahlbohm, Lubbig H (Eds., SQUID85: Superconducting Quantum Interference Devices and their Application, Walter De Gruyter, Berlin-New York, 1985: 918–932.
Romani, G.L. and Narici, L., Principles and clinical validity of the biomagnetic method. Medical Progress through Technology 1986, 11: 123–159.
Romani G.L. and Rossini P.M., Neuromagnetic functional localization: principles state of the art and perspectives. Brain Topography 1988, 1988, 1: 5–21
Van Der Tweel, L.H. and Verduyn Lunel, H.F.E., Human visual responses to sinusoidally modulated light, Electroenceph. Clin. Neurophysiol., 1965, 18: 587–598.
Williamson, S.J. and Kaufman, L., Analysis of neuromagnetic signals. In: A.S. Gevins and A. Rémond (Eds.), Handbook of electroencephalography and clinical Neurophysiology Revised series vol 1: Methods of analysis of brain electric and magnetic signals, Elsevier, Amsterdam, 1987: 405–448.
Author information
Authors and Affiliations
Additional information
Acknowledgements: We want to thank I. Modena, V. Pizzella, P.M. Rossini, G. Torrioli and R. Traversa for usefull discussions.
Rights and permissions
About this article
Cite this article
Narici, L., Romani, G.L. Neuromagnetic investigation of Synchronized Spontaneous Activity. Brain Topogr 2, 19–30 (1989). https://doi.org/10.1007/BF01128840
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF01128840