Info on Sleep "deprication"; respect your sleep yo!
Answer by Alex K. Chen:
http://www.plosbiology.org/article/info:doi/10.1371/journal.pbio.0020221 – No Rest for the Weary: Migrating Songbirds Keep Their Wits without Sleep
http://www.sciencemag.org/content/326/5955/1005.abstract – Amyloid-β Dynamics Are Regulated by Orexin and the Sleep-Wake Cycle
6-7 hours of sleep as optimal: (replicated across multiple studies)
In fact, it suggests that 6-7 hours is optimal.
Study is here:
Effects of Provigil: