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. Author manuscript; available in PMC: 2013 Oct 1.
Published in final edited form as: Biol Psychol. 2012 Jul 31;91(2):283–291. doi: 10.1016/j.biopsycho.2012.06.010

Figure 2.

Figure 2

Time Awake by Photoperiod interaction within morning sessions for AR-referenced data. Higher scores are indicative of more relative left frontal activity. Results indicate that within morning sessions, in periods of less light, those awake fewer than 3 hours show significantly less relative left frontal activity that those awake longer. However in periods of more light the pattern is significantly reversed. Data represent collapsed scores across four frontal regions (F2-F1, F4-F3, F6-F5, & F8-F7).

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