Figure 6

Phase shifts of onsets, offsets, and duration of aMT6s rhythm. A. The time shifts for aMT6s onsets (black triangles) and offsets (red triangles) are contrasted, after averaging the data in 2 h bins showing the mean ± 1 SEM shifts in time, referencing time-of-stimulation to aMT6s onset. The abscissa (Circadian Clock Time) represents our best estimate of the mean clock time at which bright light stimuli occurred, adjusted for each participant's aMT6s onset time, as in Figure 5. The asterisks show mean aMT6s onset and offset times for all 106 participants. B. The change in mean aMT6s duration resulting from unequal shifts in aMT6s onset and offset is plotted, using the same bins and abscissa as above.