Lethargy
Lethargy is a clinical sign with many potential causes. Here are a few links that are interesting cases or points of discussion.
West Nile Virus - http://journals.lww.com/em-news/Fulltext/2010/04000/Quick_Consult__Lethargy,_Headache,_Fever,.10.aspx
Elderly & A-Fib? Think dig toxicity - http://www.emergucate.com/2012/08/29/the-daily-educational-pearl-cause-of-lethargy-and-nausea/?utm_source=rss&utm_medium=rss&utm_campaign=the-daily-educational-pearl-cause-of-lethargy-and-nausea
Tick Paralysis - http://lifeinthefastlane.com/ccc/tick-paralysis/