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Sleep deprivation began two hours after lights on (02:00) and lasted for 2, 4, or 6 hours (black blocks). The first hour of the recovery period began at 04:00, 06:00, or 08:00, respectively, illustrated by the gray blocks. All results represent evoked responses collected during quiet sleep within this first hour recovery period. In the control condition, animals were freely behaving and responses were measured during a one hour period beginning at 04:00, 06:00, and 08:00.
