Neurotronics.org

Comment: This is a very high-level article, but I thought the conclusion was interesting.

Most of the time the brain works as it ought to: limbs move, memories are retrieved and experiences processed. But occasionally things go awry.

In tip-of-the-tongue experiences, for instance, words suddenly and perplexingly go missing only to reappear seconds or minutes later. Another brain quirk – déjà vu – confirms the fallibility of memory. Now two new studies have shed light on both phenomena.

http://www.newscientist.com/article/dn17263-why-your-brain-just-cant-remember-that-word.html

Abstract on the journal article:
http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6T24-4WCT00D-1&_user=10&_rdoc=1&_fmt=&_orig=search&_sort=d&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=d7a5c254a14c5e5796244d108d768a2d