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. Author manuscript; available in PMC: 2020 Nov 30.
Published in final edited form as: J Neurosurg. 2019 May 31;132(6):1930–1937. doi: 10.3171/2019.2.JNS183486

FIG. 3.

FIG. 3.

Intraoperative wakefulness tasks assessing a patient’s ability to keep eyes open for 10 seconds (A), count aloud 1–20 by ones as fast as possible (B), press button 1 as many times as possible over 5 seconds (C), and press button 1 when a red indicator box is in the upper half of the screen and button 2 if the red indicator box is in the bottom half of the screen (D).