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Oscillations are independent of the firing frequency in neonatal animals. (A) Paired recordings from LC neurons in a brain slice from a neonatal rat in control spontaneous frequency (middle traces) and when the excitability was increased by muscarine application (10 μM, traces on left) and decreased by TTX (traces on right, 1 μM). (B) Cross-correlogram of the recordings under these experimental conditions showed no changes in rhythm and synchrony.
