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. 2009 Mar 1;32(3):399–408. doi: 10.1093/sleep/32.3.399

Figure 3.

Figure 3

Mean amplitude of eye movements 1 min preceding tone presentation (pre-stimulation), during 1 min tone presentation (stimulation) and 1 min following tone presentation (post-stimulation). Error bars denote standard error of the mean. **P < 0.01- Wilcoxon signed rank test comparison to the stimulation condition.