Portal de Periódicos da CAPES

SIMULATING CORTICAL BACKGROUND ACTIVITY AT REST WITH FILTERED NOISE

2008; Imperial College Press; Volume: 07; Issue: 03 Linguagem: Inglês

10.1142/s0219635208001885

1757-448X

Walter J. Freeman, Seán O'Nualláin, José Rodríguez,

Functional Brain Connectivity Studies

Journal of Integrative NeuroscienceVol. 07, No. 03, pp. 337-344 (2008) Short CommunicationNo AccessSIMULATING CORTICAL BACKGROUND ACTIVITY AT REST WITH FILTERED NOISEWALTER J. FREEMAN, SEAN O'NUALLAIN, and JOSÉ RODRIGUEZWALTER J. FREEMANDepartment of Molecular and Cell Biology, Donner 101, University of California at Berkeley, CA 94720-3206, USACorresponding author., SEAN O'NUALLAINDepartment of Molecular and Cell Biology, Donner 230, University of California at Berkeley, CA 94720-3206, USANous Research, Dublin 4, Ireland, and JOSÉ RODRIGUEZDepartment of Mathematics, Memphis University, Memphis TN 38152, USAhttps://doi.org/10.1142/S0219635208001885Cited by:14 PreviousNext AboutSectionsPDF/EPUB ToolsAdd to favoritesDownload CitationsTrack CitationsRecommend to Library ShareShare onFacebookTwitterLinked InRedditEmail AbstractPhase slip and beat phenomena are ubiquitous in many forms of wave superposition. Likewise, it is trivially true that cumulative summation of individual random events gives rise to "brown noise" (1/f2 power spectrum). This paper presents a simulation that relates these phenomena with cortical function. We report that phase interference in the distributed frequencies of oscillation in bandpass-filtered brown noise gives null power spikes like those in the electrocorticograms (ECoG) from test subjects. The null spikes coincide with the onsets of frames in which the spatial amplitude patterns are classifiable with respect to conditioned stimuli. We report similarity in the waveforms and amplitude distributions of null spikes upon filtering brown noise in bands corresponding to the theta, alpha, beta and gamma ranges in experimental and simulated ECoG. We estimate a threshold in null spike minimal amplitudes below which perceptual frames having gamma oscillations may recur at theta rates.Keywords:Brown noiseelectrocorticogram (ECoG)null spikespower spectral densityRayleigh noise References J. M. Barrie, W. J. Freeman and M. Lenhart, J. Neurophysiol. 76, 520 (1996). Crossref, Medline, ISI, Google ScholarW. J. Freeman, Trans. IEEE Biomed. Engin. 21, 350 (1974). Medline, ISI, Google Scholar W. J. Freeman , Mass Action in the Nervous System ( Academic Press , New York , 1975 ) . Google ScholarW. J. Freeman, Clin. Neurophysiol. 116, 1118 (2005), DOI: 10.1016/j.clinph.2004.12.023. Crossref, Medline, ISI, Google ScholarW. J. Freeman, Clin. Neurophysiol. 117, 572 (2006), DOI: 10.1016/j.clinph.2005.10.025. Crossref, Medline, ISI, Google Scholar W. J. Freeman , Neurodynamics of Cognition and Consciousness , eds. L. Perlovsky and R. Kozma ( Springer , Heidelberg , 2007 ) . Crossref, Google ScholarW. J. Freemanet al., Clin. Neurophysiol. 117, 1228 (2006), DOI: 10.1016/j.clinph.2006.03.012. Crossref, Medline, ISI, Google ScholarW. J. Freeman and G. Vitiello, J. Physics A. Math. Theor. 41, 304042 (2008), DOI: 10.1088/1751-8113/41/30/304042. Crossref, ISI, Google Scholar D. B. Percival and A. T. Walden , Spectral Analysis for Physical Applications: Multitaper and Conventional Univariate Techniques ( CUP , Cambridge , 1993 ) . Crossref, Google ScholarM. E. Raichle, Science 314, 1249 (2006), DOI: 10.1126/science. 1134405. Crossref, Medline, ISI, Google Scholar M. Schroeder , Fractals, Chaos, Power Laws ( WH Freeman , San Francisco , 1991 ) . Google Scholar FiguresReferencesRelatedDetailsCited By 14On the brain-mind visual experiencesTania Re and Giuseppe Vitiello1 Jul 2020Entanglement and Phase-Mediated Correlations in Quantum Field Theory. Application to Brain-Mind StatesShantena A. Sabbadini and Giuseppe Vitiello6 August 2019 | Applied Sciences, Vol. 9, No. 15Image Sampling Based on Spectral AnalysisWalter J. Freeman and Rodrigo Quian Quiroga21 September 2012Allocortical ECoG Images Formed by LearningWalter J. Freeman and Rodrigo Quian Quiroga21 September 2012ECoG and EEG Images in Higher CognitionWalter J. Freeman and Rodrigo Quian Quiroga21 September 2012Consciousness is Cheap, Even if Symbols are Expensive; Metabolism and the Brain's Dark EnergySeán O Nualláin and Tom Doris18 October 2011 | Biosemiotics, Vol. 5, No. 2Understanding Perception Through Neural "Codes"W J Freeman1 Jul 2011 | IEEE Transactions on Biomedical Engineering, Vol. 58, No. 7Evidence for a Spatiotemporal Singularity in Percept Formation by Cerebral CortexWalter J. Freeman20 October 2010VORTICES IN BRAIN WAVESWALTER J. FREEMAN and GIUSEPPE VITIELLO25 January 2012 | International Journal of Modern Physics B, Vol. 24, No. 17Phase transitions, cortical gamma, and the selection and read-out of information stored in synapsesJ.J. Wright3 December 2009Vortices in brain activity: Their mechanism and significance for perceptionWalter J. Freeman1 Jul 2009 | Neural Networks, Vol. 22, No. 5-6Dissipative neurodynamics in perception forms cortical patterns that are stabilized by vorticesWalter J Freeman and Giuseppe Vitiello26 June 2009 | Journal of Physics: Conference Series, Vol. 174Cortical mechanisms of memory formation and readoutWalter J. Freeman1 Jun 2009Deep analysis of perception through dynamic structures that emerge in cortical activity from self-regulated noiseWalter J. Freeman4 February 2009 | Cognitive Neurodynamics, Vol. 3, No. 1 Recommended Vol. 07, No. 03 Metrics History Received 4 March 2008 Accepted 3 July 2008 KeywordsBrown noiseelectrocorticogram (ECoG)null spikespower spectral densityRayleigh noisePDF download