It doesn't mention in webmd brain damage from sleep deprivation. It mentioned an affect of memory, and more studies needed.
The news articles from business owned papers(question money trail and self interest of study), that studies on shift workers shows brain damage, loss of cells. I'd prefer to see a published med source over something like Forbes or CNN, for this answer.

Here's the webmd article. ..

http://www.m.webmd.com/sleep-disorde...-memory?page=4

Sent from my LGMS323 using Tapatalk