The nonlinear dynamical analysis of the EEG in schizophrenia with temporaland spatial embedding dimension

We applied nonlinear dynamics theory to EEG analysis of schizophrenic patie nts and estimated the correlation dimension with both temporal embedding an d spatial embedding A higher D-2 was found when using a time-delay embeddin g method. Especially at F-7 and Fp(1), a significant Increase showed. We co ncluded that more complex activity occurred in certain lobes of schizophren ic patients. Using the spatial embedding method, a relative lower global co rrelation dimension was obtained. This shows that there might be a diffuse slow wave activity through a schizophrene's global cerebrum. Finally we dis cuss the study from three angles of clinical semiology, spectrum analysis a nd neuropsychology and draw some conclusions about the relationship between the nonlinear analysis of schizophrenia EEG and clinical research. It seem s that the theory of a nonlinear dynamics system is a powerful tool for EEG research and may prove useful in complementing visual analysis of EEG acco mpanied with other study means for brain electrical activity.