Morning exam test taking strategy... wake up super early?

So I have an exam at 9am on Monday and part of me wants to try to review last bits of information in the 4-5 hours leading up to it. Is there any detriment to my alertness/performance/memory if I go to bed very early the prior day (say 7-8pm) but then wake up at around 3-4am and study until the exam? It would be helpful if anyone has experience - but I definitely don't plan on doing an all nighter. Had 1 bad experience in undergrad and yeah, never again.
Source: Student Doctor Network - Category: Universities & Medical Training Authors: Tags: Medical Students - MD Source Type: forums