[pmarreck]

Brain damage can start around that point... Watch out

[andai]

Source? I expected harm would come much earlier.

[pmarreck]

http://sites.bu.edu/ombs/2014/03/24/new-study-shows/

I'm in the middle of stuff and can't google a more concise source but I recall it being about 4-5 days

[wild_preference]

I hit that figure quite a bit back in my stimulant abuse days.

But your blog post specifically refers to chronic sleep loss.