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In the sensory thalamus and periventricular gray/periaqueductal gray(PAVG)nucleus,the synchronization level of multiple frequency band oscillations of local field potentials(LFPs)have been shown to be associated with chronic pain perception and modulation.In this study,a state identification approach was generated for dynamic identify the synchronization state of neural oscillation.In this approach,a pattern extraction model was created to characterize the patterning of the neural oscillations based on wavelet packet transform.