Abstract: ObjectiveTo investigate the changes of non-linear dynamics characteristic of EEG in patient with acute cerebral stroke under eyes closed state. MethodsEEG were recorded in 31 patients with acute cerebral infarction and 22 healthy volunteers under eyes closed state. Correlation dimension (D₂) and Approximate Entropy (ApEn) were calculated for all subjects. ResultsD2 and ApEn of uninjured forehead cortex (FP₁,FP₂)reduced significantly in the group of cerebral infarction as compared with the group of normal control at eyes closed state. ConclusionDynamic analysis based on D₂ and ApEn topographic maps might be helpful in understand the changes of mental functions after stroke, that can be used in the study of mental function.

Key words: non-linear dynamics, electroencephalograph (EEG), state of eyes closed, stroke