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. Author manuscript; available in PMC: 2014 Dec 1.
Published in final edited form as: Neuroimage. 2013 May 29;83:10.1016/j.neuroimage.2013.05.020. doi: 10.1016/j.neuroimage.2013.05.020

Figure 1. Image-Data Acquisition Time line.

Figure 1

Prep = subject preparation, including placement of sound-attenuating ear plugs, adhesive electrodes, and foam head restraints. Localizer = anatomical localization scan to position the imaging volume. T1 = T1-weighted anatomical scan. T2* = 15 min BOLD image-volume acquisition for ICN analysis. ASL = 2.5 min arterial spin labeled acquisition. The number of epochs of T2* (1-3) and ASL data (3-5) varied across subjects, depending on sleep duration. SS = sleep-stage determination, which was performed between all imaging epochs.