MRI data acquisition
BEST
The fMRI resting state scan was performed in the morning after both experimental nights on a Philips Achieva 3T whole-body MR-unit equipped with a 32-channel head coil (Philips Medical Systems, Best, The Netherlands). The session started at 09:00 a.m. with a T1-weighted anatomical brain scan and was followed by fMRI acquisition (5- and 10-min duration, respectively). RsFC time series were acquired with a sensitivity-encoded single-shot echo-planar imaging sequence (SENSE-sshEPI). The rsFC protocol used the following acquisition parameters: TE = 35 ms, TR = 3,000 ms, flip angle = 82°, FOV = 220 mm, acquisition matrix = 80 × 80 (in plane voxel size = 2.75 × 2.75 mm