FIG. 4.

Bar plots showing mean preoperative performance compared to intraoperative performance on 4 of the 5 wakefulness tasks with error bars indicating ± standard error. The eyes-open task was excluded from this figure because all patients were able to successfully complete it in both testing environments. A: Self-reported arousal ratings were not significantly different in the intraoperative setting. B: Patients required on average 2.1 more seconds (s) to count to 20. C: Patients pressed the indicated button on average 5.3 fewer times. D: Patients experienced on average a 30.1% reduction in performance on the vigilance task. *0.01 ≤ p < 0.05, **0.001 ≤ p < 0.01, ***p < 0.001.