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De Coteau, W.E., Thorn, C., Gibson, D.J., Courtemanche, R., Mitra, P., Kubota, Y. and Graybiel, A.M. (2007) Oscillations of local field potentials in the rat dorsal striatum during spontaneous and instructed behaviors. Journal of Neurophysiology, 97, 3800-3805. doi:10.1152/jn.00108.2007

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• TITLE: Effect of propofol on local field potential in rat prefrontal cortex during working memory task

  AUTHORS: Xinyu Xu, Guolin Wang, Wenqian Zhai, Wenwen Bai, Tiaotiao Liu, Xin Tian

  KEYWORDS: Propofol; Working Memory; Local Field Potential; Rat

  JOURNAL NAME: World Journal of Neuroscience, Vol.2 No.3, August 23, 2012

  ABSTRACT: Propofol may produce memory impairment during anesthesia procedure. Local field potentials (LFPs) are used with increasing frequency in recent years to link neural activity to perception and cognition. In this study, effect of propofol on LFPs in rat’s prefrontal cortex during working memory task was evaluated. Young (approximately 3 month) male Sprague-Dawley rats were divided into two group: propofol rats and control rats. Propofol rats received propofol at 0.9 mg/Kg·min intravenously for 2 h. After 12 h, LFPs of all rats were measured simultaneously from multiple electrodes placed in prefrontal cortex while rats were performing a working memory task in Y-maze. LFPs instantaneous phase were obtained by applying Hilbert transform, and cross-correlation coherence of LFPs was calculated. The results indicate that propofol decreased the correct rate and crosscorrelation coherence of LFPs on the first two days (p 0.05). Our results suggest that propofol can impair cross-correlation coherence of LFPs in the first two days, but not long time.