ABSTRACT

Is there any evidence for chaos in the dynamical behavior of the human central nervous system? In most instances, evidence supporting this hypothesis is based on examinations of EEG records taken in a variety of conditions (Babloyantz & Destexhe, 1986; Duke & Pritchard, 1991; Dvorak & Holden, 1991; Jansen & Brandt, 1993; Rapp, Bashare, Martherie, Albano, & Mees, 1991; Rapp et al., 1985). The purpose of this chapter is to show that many of the results obtained with EEGs can be obtained with filtered noise. Since EEG signals are filtered, these calculations raise important questions about the validity of published demonstrations of chaotic behavior in the EEG.