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. Author manuscript; available in PMC: 2021 Jul 1.
Published in final edited form as: Sleep Med. 2020 Feb 5;71:141–148. doi: 10.1016/j.sleep.2020.01.024

Figure 1:

Figure 1:

Average total activity counts for every 6-minute period over 2 days for 3 female BXD strains n=8 for strains 40 and 31, n=7 for strain 14).

The lights off active period is from 6 PM to 6 AM. Note for BXD40f only (top graph) the repeated peak increases in activity during the last 2 hours of the active cycle from 4 – 6 AM on each day. This one period of time, 2 hours before the end of the active period, has consistently greater activity for the BXD40f compared to all seven other strains evaluated as reported by Earley et. al, Sleep Med, 2019. (Graphs provided by Erica Unger.) The two other strains shown here for comparison are chosen for overall high (strain 14) or low (strain 31) activity, neither shows increased activity at 4– 6 AM.