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. Author manuscript; available in PMC: 2016 Mar 1.
Published in final edited form as: Brain Cogn. 2015 Jan 14;0:4–9. doi: 10.1016/j.bandc.2014.12.004

Fig. 2.

Fig. 2

P50 sensory gating ratios (left) and amplitude of the evoked P50 waves (right) during non-REM and REM sleep (active sleep in the infant). During REM sleep, the amplitude of the P50 response to the second sound is decreased relative to the amplitude of response to the first sound. This is reflected in a sensory gating ratio significantly less than 1. During non-REM sleep, there is no significant difference in the amplitude of response to the second as compared to the first sound, reflected in a ratio not significantly different from 1.